1. Primitive period
In old China, the oil industry was extremely backward. Most sedimentary basins have not been investigated for petroleum geology, and the oil and gas production is extremely low, with only a few small oil fields such as Yumen and Yanchang. There are few technicians engaged in petroleum geology, and the investigation and study of petroleum hydrogeology is a blank point. After the founding of New China, China's petroleum industry has made rapid progress, and large-scale oil and gas exploration has been carried out in major oil-bearing basins. With the need of oil and gas exploration, planned regional hydrogeological surveys have been carried out in Jiuquan basin, Junggar basin, Qaidam basin, Sichuan basin and Ordos basin, and the relationship between groundwater and oil and gas has been studied. The water data of oil fields are increasing day by day. At the same time, Beijing, Changchun, Chengdu and other geological colleges have opened hydrogeology (including oil fields and water) courses, and invited Soviet experts and scholars to give lectures in China. Textbooks and main reference books are basically translated versions of the Soviet Union, such as Ovi Csnikov; Introduction to hydrogeology (Klimentov); Investigation and exploration of groundwater (kaminsky); Lecture on Hydrogeology (krylov); Oilfield water in natural water system (Surin); Hydrogeology of Oil Mine (Sukharev). In the production and scientific research of oilfield hydrogeology, we mainly follow the technology and methods of the Soviet Union and carry out our work according to the suggestions of Soviet experts. At the beginning of 1955, China officially began to carry out regional comprehensive hydrogeological survey. In the same year, initiated by academician Guan Shicong, a petroleum geologist, the Northwest Geological Bureau of the Ministry of Geology carried out a general survey of groundwater oil in Liupanshan area, which pioneered the hydrochemical oil exploration in China. Subsequently, the Geophysical Exploration Institute of the Ministry of Geology conducted hydrochemical oil exploration tests in Sichuan, Karamay and other areas.
At present, it is mainly to learn from the experience, technology and methods of the former Soviet Union, set out to establish the hydrogeology of China's oil fields, train talents, and cooperate with oil survey and exploration to conduct regional hydrogeology survey.
2. Summarize the research stage
From the end of 1950s to the end of 1970s, with the great breakthrough of oil and gas exploration in eastern China (Songliao Basin and Bohai Bay Basin, etc.). ) and the rapid development of oilfield development, the basic information of oilfield hydrogeology is increasingly rich, and many oilfields (Daqing, Fuyu, Shengli, Dagang, Jizhong, Jianghan, Henan, Changqing, Sichuan, etc. ) are equipped with hydrogeological technical personnel, and organized the establishment of a special oilfield water research department. Starting from the actual needs of oil and gas exploration in this area, on the one hand, they undertake the hydrogeological investigation of oil field water supply, on the other hand, they discuss the hydrogeological conditions of oil and gas occurrence and summarize the basic characteristics of oil field water chemical composition. For example, the comprehensive research team of the Third General Survey and Exploration Brigade of the Petroleum Bureau of the Ministry of Geology set up a hydrogeological group, focusing mainly on Triassic and Jurassic in Ordos Basin, to study the hydrogeological conditions of oil and gas migration, explore the hydrogeological laws of oil and gas enrichment in Sanyan (Yanchang, Yan 'an and Yanchuan) areas, and summarize the hydrogeochemical characteristics of known oil fields (Yongping, Yanchang and Zaoyuan, etc.). ), to carry out hydrochemical oil exploration experiments and explore hydrochemical indicators and methods. Researcher of hydrogeology in Changqing Oilfield (Liu Xiaohan et al. ) The characteristics of lower Jurassic oilfield water and its preservation conditions with oil and gas reservoirs in Ordos Basin are summarized and studied, and the analysis data of lower Jurassic and upper Triassic oilfield water in Lizhuangzi, Majiatan, Dashuikeng, Maling and Huachi oilfields are systematically sorted out. Sichuan Petroleum Administration Bureau (Liu et al. ) A large-scale regional hydrogeological investigation was conducted in Sichuan Basin, and a new viewpoint that formation water migrated from the interior of the basin to the periphery of the basin was put forward, and a conclusion contrary to the traditional understanding was drawn, and the hydrogeological conditions and gas-bearing degree of Triassic, Permian and Carboniferous in eastern Sichuan were predicted. Chengdu Institute of Geology (Sun Shixiong et al.) and Institute of Hydrogeology and Engineering Geology (Wang Yunpu et al.) have studied the formation, paleohydrogeological conditions and geochemical traces of brine activities in Sichuan Basin. Hydrogeologist in Yumen Oil Mine established vertical profile of hydrochemistry according to hydrochemistry data of drilling holes in Yaerxia, Youshi and laojunmiao oilfields and combined with regional hydrogeology results. Except that the water type changes with age to CaCl2 _ 2 type, other hydrochemical components (salinity, metamorphic coefficient, chlorine-sulfur ratio, etc. ) does not show the orderly phenomenon of increasing (decreasing) with the increase of depth as pointed out by scholars in the former Soviet Union. In Songliao Basin, Daqing Oilfield Scientific Research and Design Institute (Wang Jun, Huang,), etc. ) Summarized the chemical composition characteristics of oilfield water-single NaHCO3 water, mainly composed of Cl and Na subfamilies, with salinity of 1 ~ 12g/L, containing trace components such as I, Br, B and NH4. According to the relationship between salinity and salinity coefficient (rCl/rHCO3+rCO3), it can be divided into three categories: high salinity NaHCO3 water (6 ~ 12g/l), medium salinity NaHCO3 water (3 ~ 6g/l), salinity coefficient 0.5 ~ 10, and low salinity. The changes of physical and chemical properties of oil, gas and water during water injection in Lamadian, Sarthou and Xingshugang oilfields are discussed, and the analysis indexes of physical and chemical properties of oil, gas and water are preliminarily summarized. In the process of water injection, oxidation, dissolution, reservoir temperature, pressure, biochemical action and the loss of light fractions during dehydration are the factors that change the physical and chemical properties of oil, gas and water. Jilin Oilfield Petroleum Research Institute (Yang Zhonghui, etc. ) Using the function formula to predict oil and gas, the discriminant function values of Fuyu, Mu Xin, Honggang, Gansu and Nong 'an areas are calculated, and the soluble organic components (benzene and organic acids) in water are summarized. Research Institute of Petroleum Exploration and Development of Ministry of Petroleum (Li Jimin et al.) summarized the application law of oilfield water characteristic index, with desulfurization coefficient as the main factor, sealing coefficient (rNH4+rH2S/rSO4) to explain the existence of oil and gas, genetic coefficient combined with the change law of salinity, desulfurization coefficient and sodium-chlorine ratio to judge the migration direction of oil, gas and water, and summarized the characteristics of forward and backward oilfield hydrochemical profile and its relationship with oil and gas reservoirs. Exploration Institute of North China Petroleum Exploration Headquarters (Xie Jiasheng, etc. ) The hydrogeological conditions of buried hill and Tertiary in Jizhong Depression and their relationship with hydrocarbon migration, accumulation and preservation, and the chemical composition of groundwater, especially the relationship between organic components in water (benzene and its homologues, phenol, volatile organic acids, naphthenic acid and ammonium) and oil and gas are summarized. The Exploration and Development Research Institute of Henan Petroleum Battle Command (Wang Yixian, et al.) put forward vertical zoning of hydrogeology and hydrochemical types suitable for this area according to the characteristics that the oilfield water in Nanxiang Basin (especially Biyang Depression) is low salinity NaHCO3 water. Exploration and Development Research Institute of Jianghan Petroleum Administration Bureau (Li Jiming, Yu Liansheng) summarized the horizontal and vertical distribution laws of chemical components (including principal components, salinity, iodine, bromine, boron, lithium, etc.). ) The groundwater with high salinity and high sulfate in Paleogene in Qianjiang Depression was studied, and the chemical composition of groundwater and its relationship with oil and gas were discussed. It is considered that oilfield water with salinity above 200g/L is an important raw material for developing salinization industry. Changchun Institute of Geology (,Zhang,), etc. ) The role of deep groundwater (water in the magma crust of the lower crust and upper mantle) in the process of petroleum mineralization is studied, and the hydrogen and oxygen isotopic composition of groundwater in different periods (Quaternary and Upper Tertiary, Lower Tertiary and buried hill) is studied by taking Jizhong Depression as an example. Combined with the characteristics of hydrochemical composition, the source, origin and relationship between groundwater and oil and gas are discussed. Chengdu Institute of Geology (Sun Shixiong, Shen et al. This paper studies the chemical composition characteristics of marine and continental oilfields in China, points out the role and significance of paleohydrogeology analysis in the formation, preservation and destruction of oilfields, discusses the research methods and contents of paleohydrogeology in combination with Jizhong Qianshan Oilfield, and puts forward four paleohydrodynamic zones in Bohai Bay Basin. Institute of Hydrogeology and Engineering Geology (Wang Yunpu,,, Wang et al. ) The characteristics and causes of brine in Sichuan Basin are studied. 1975 and 1976 respectively published several problems in Surin oilfield water theory in Journal of Hydrogeology, Engineering Geology and Geology, and thought that B and A Surin oilfield water theory had certain limitations, which restricted the establishment of oilfield water theory in China. When the Exploration and Development Research Institute of Xinjiang Petroleum Administration (Wang Zhonghou et al.) summarized the chemical composition of Karamay Oilfield, Na2SO4 water with salinity as high as 26 ~ 27g/L was found in Triassic (No.56) oilfield water, which alternated with CaCl2 water or NaHCO3 water in the longitudinal section and was between CaCl2 water and NaHCO3 water in the plane distribution. Different opinions are also put forward on the article "Comment on Three Problems in Sulin Oilfield Water Theory"; Oil team 10 1 (Zhang Jinlai, Liu Chongxi, etc. The hydrogeochemical characteristics of major oil-bearing basins that have been explored and developed in China are systematically sorted out and studied, and the hydrochemical composition of continental oilfields in China is summarized, including salinity, ion ratio, organic components, trace elements and isotopes (hydrogen, oxygen and carbon). The concept of ion combination and several ideas of chemical composition classification of oilfield water are put forward. The simulation test of groundwater evaporation and leaching and the experimental summary of hydrochemical oil exploration method are carried out. The relationship between chemical components of oilfield water is studied by mathematical statistics. The analytical and testing techniques and methods of organic components in oilfield water are developed.
The hard work of the above-mentioned scientific and technological workers has promoted the rapid development of oilfield water research in China, and gradually formed or ushered in a marginal discipline-oil and gas hydrogeology, which is closely combined with petroleum geology and hydrogeology, and began to explore hydrogeological exploration procedures and research methods with the characteristics of China's petroleum geology theory, heading for the road of serving regional oil and gas prospect prediction and evaluation and oilfield exploration and development.
3. Pioneering and innovating development stage
Since the early 1980s, China oil and gas hydrogeology has entered a new stage of rapid development. Rich research results and good application results have been achieved, mainly in the following aspects:
1) The Geological Society of China Petroleum Geology Committee held the "Symposium on Hydrochemistry of China Oilfield" in Hefei on 198 1. Seventy-five representatives from the Ministry of Geology, the Ministry of Petroleum Industry, the Chinese Academy of Sciences and universities submitted 42 academic papers. Guan Shicong, academician of China Academy of Sciences and chairman of Geological Society of China Petroleum Geology and Professional Committee, presided over the meeting, and Zhang Zonghu, academician of China Academy of Sciences and hydrogeologist made a written speech. The contents of the conference papers include: the relationship between hydrogeochemical characteristics of oil fields and oil and gas in major oil-bearing basins in China, the classification of chemical composition of oil field water, the source of oil field water, the shallow hydrogeochemical effect of oil and gas reservoirs, the application of hydrochemical methods in oil exploration, paleohydrogeology analysis and oil and gas prospect evaluation, the role of deep water in the formation of oil and gas minerals, the application of new computer technology in the study of oil field water, the role of hydrodynamic conditions in the formation of oil and gas reservoirs, and analysis and testing techniques. This meeting is the first special oil field water conference in China. Under the guidance of the policy of "letting a hundred flowers blossom and a hundred schools of thought contend", petroleum hydrogeologists gather together to exchange results, discuss freely, express their opinions and speak freely, and the academic atmosphere is extremely active. The meeting reviewed the achievements, exchanged experiences, clarified the direction and strengthened cooperation. It is of far-reaching significance to promote the research of oilfield water in China, improve the overall research level and accelerate the development of oilfield water industry, and has certain influence at home and abroad.
2) Drawing lessons from the experience of oilfield hydrogeology research at home and abroad and through the practice of oil and gas production, China's oilfield hydrogeology work has entered the road of serving oil and gas production based on petroleum geology and focusing on the actual needs of oil and gas exploration and development. Combined with the overall goal of exploration and development of continental oil and gas fields in eastern China, the hydrogeological characteristics of continental oil fields are emphatically studied, and then the hydrogeological research of marine oil fields is strengthened, and some original research results are obtained. Many papers are published every year. The following are examples of each year:
Ion binding characteristics of China oilfield water (geochemistry, 1978, Liu Chongxi): On the basic characteristics and classification of oilfield water in China (Geological Review, 1979, Zhang Jinlai): A noteworthy geological information-phenol (buried hill, 1980, Xie Jiasheng); Formation of condensate water and hydrocarbon hydrate in natural gas (natural gas industry, 198 1 year, Liu Lun); Comprehensive application of hydrochemistry and its characteristic indexes in oilfield hydrogeological exploration (oil exploration and development, 1982, Liu Jimin); Hydrogeochemical indicators of oil and gas fields and their applications (Petroleum and Natural Geology, 1982, Yang Zhonghui); Hydrogeochemical characteristics of oil fields in Biyang sag and their relationship with oil and gas (Petroleum Experimental Geology, 1983, Wang Yixian); Paleohydrogeological conditions and oil and gas in Taizhou area (petroleum and natural gas geology, 1983, Gong, Jin); Hydrochemical field and its genesis in southern Sichuan Basin (Geoscience, 1984, Wang Yunpu); Evaluation of oil and gas potential by using dissolved gas in formation water (natural gas industry, 1985, Liu); Paleohydrogeological conditions and hydrocarbon accumulation in Jiyang Depression (Petroleum Experimental Geology, 1986, Yang); Looking for hydrogeochemical indicators of oil and gas fields (oil exploration and development, 1987, Liu Chongxi); Geochemical characteristics of organic components of oilfield water in Qianjiang Depression (Petroleum Experimental Geology, 1988, Lin); On groundwater dynamic environment of oil-bearing basin (acta petrolei sinica, 1989, Yang): 3D analysis of salinity data in Zhongyuan Oilfield (Geological Science, 1990, Zhang Guangrui); Discussion on dissolved gas in groundwater and its influence on gas reservoir formation (oil exploration and development, 199 1, Sun Yongxiang); Re-exploring the influence of groundwater on gas reservoir formation (oil exploration and development, 1992, Sun Yongxiang); Study on the distribution characteristics of "fingerprint" compounds in formation water in northern Songliao Basin and their relationship with oil and gas (geochemistry, 1993, Huangfutang); Characteristics and Genesis of Hydrochemical Field in Fuyang Oil Layer (Daqing Petroleum Exploration and Development, 1994, Lou Zhanghua); Classification of organic geochemical characteristics of oilfield water in Tarim Basin and its petroleum geological significance (oil exploration and development, 1995, Li Wei); Hydrochemistry of oil fields in Tarim Basin (geochemistry, 1996, Cai Chunfang); Hydrogeological demonstration of oil and gas migration and accumulation in Xihu sag (China Offshore Oil and Gas, 1997, Wang Yunpu); Hydrogeological control of coalbed methane in Qinshui basin (oil exploration and development; 1998, Chi Weiguo); Hydrodynamic system of oil field and formation of oil and gas reservoirs (Marine Geology and Quaternary Geology, Chen Jianwen,1998); Three-dimensional numerical simulation method of basin hydrodynamics and its application (Petroleum Exploration and Development, 2000, Denglin); Research and application of water-soluble heavy hydrocarbons in Tarim Oilfield (Xinjiang Petroleum Geology, 200 1, Chen); Discussion on the genesis of formation water in Tahe Oilfield and its adjacent areas (Petroleum Experimental Geology, 2002, Cai); Discussion on main control factors and evaluation methods of water-soluble natural gas resources enrichment (Natural Gas Geoscience, Wu Xiaochun, 2003); Determination method and automatic analyzer of carbonate and bicarbonate (Modern Instruments, 2004, Zheng); Influence of hydrodynamic conditions on coalbed methane content-theory of controlling water and gas by coalbed methane retention (natural gas geological science, 2005, Qin et al.)
The above representative papers are excerpted from a large number of basic research on oilfield hydrogeology covering major oil-bearing basins in China, which reflects the research status and level in China from one side. It is worth mentioning that oil production units, scientific research institutions and universities have not only increased the intensity of oilfield hydrogeology research, but also formed a research group that combines production with research and cooperates with many units to tackle key problems. Organized by Academician Zhai Guangming, the Ministry of Petroleum Industry systematically summarized the hydrogeological characteristics of various oilfields in China. Oil field hydrogeology research has been included in the national key scientific and technological projects, such as "Discussion on the control of Permian hydrogeology conditions on oil and gas migration and accumulation in Sichuan Basin during the Seventh Five-Year Plan" (Yang Jiaqi of Sichuan Petroleum Administration Bureau, etc.). ); Study on the Relationship between Hydrogeology and Oil and Gas Accumulation in Tarim Basin during the Ninth Five-Year Plan (Li Wei, Petroleum Exploration and Development Research Institute, etc. ); And "Study on the Relationship between Hydrochemical Field, Hydrodynamic Field and Oil and Gas Enrichment of Upper Triassic in Western Sichuan" (Wu, Natural Gas Institute of Langfang Branch of PetroChina, etc. ). Projects supported by the National Natural Science Foundation, such as "Cenozoic evolution of deep groundwater system and groundwater salinity" (Shen, China Geo University); "Origin and Mixed Evidence of Paleozoic Oilfield Water in Tarim Basin" (Cai Chunfang, Institute of Geology and Geophysics, China Academy of Sciences). Ph.D. students in hydrogeology in colleges and universities also study oilfield hydrogeology, such as "Characteristics of hydrochemical composition in Linyi Basin and its research significance" (199 1 year, Zhang Zuochen, China Geo University); "Study on Hydrochemical Field and Hydrodynamic Field of Petroleum Migration and Accumulation in Biyang Depression" (1992, Li Guanghe, China Geo University). There are only 83 undergraduates in Jianghan Petroleum Institute, and 5 of them take oilfield water research as their graduation thesis. Some oilfields also include oilfield hydrogeology in the major basic research topics of this system, such as "Oil-gas-water research and oil source re-discussion in Area 8 of Karamay Oilfield" and "Hydrochemistry research of Carboniferous oilfield in northwest margin of Junggar Basin" (Wang Zhonghou, Exploration and Development Research Institute of Xinjiang Petroleum Administration, 198 1 year, 1985); Hydrogen and Oxygen Isotope Composition and Genesis of Groundwater in Jizhong Depression (Changchun Institute of Geology, Sun Shan et al., 198 1 year); Hydrogeological Conditions and Oil and Gas Distribution in Jizhong Depression (North China Petroleum Exploration and Development Design and Research Institute, Zhao Baozhong et al.,1984); Hydrochemical Characteristics of Oilfield Water in Jiyang Depression and Its Relationship with Oil and Gas Accumulation, and Study on Hydrogeological Conditions of Heavy Oil Formation in Dongying Depression (Institute of Geological Sciences, Shengli Petroleum Administration, Ren et al.,1989); "Study on Hydrochemistry of Oilfield in Ying-Qiong Basin" (Institute of Geology, Nanhai Western Petroleum Company, CNOOC,1989); Relationship between hydrocarbon migration and accumulation in sedimentary basins and regional groundwater flow (China Geo University, Wang Ming et al., 199 1 year); Study on Paleohydrogeology and Inorganic Complex in Biyang Depression (Henan Petroleum Administration Bureau, Saturday, 199 1 year) and Study on the Relationship between Groundwater Dynamic Characteristics and Oil and Gas Reservoir in Fuyang Oil Layer in Northern Songliao Basin (Exploration and Development Research Institute of Daqing Petroleum Administration Bureau, 199 1 year); "Analysis of Fluid History and Reservoir Formation in Dongying Depression" (Exploration Department of Shengli Petroleum Administration Bureau, etc. , 200 1); Comprehensive Evaluation of Oil-bearing Property of Formation Water Analysis Data in Beier Fault Depression (Exploration and Development Research Institute of Daqing Petroleum Administration, 2005); Study on the Relationship between Groundwater Characteristics and Oil and Gas in Wuerxun Depression (Exploration and Development Research Institute of Daqing Petroleum Administration, 2006); Study on the Relationship between Groundwater and Oil and Gas in East Sichuan Basin (China Petroleum Exploration and Development Research Institute, Li Wei et al., 2002-2005). Wang Yunpu and Wang proposed the concept of hydrogeologic period to distinguish it from hydrogeologic cycle by absorbing the reasonable part of previous paleohydrogeologic research results. "Period" is an integral part of the hydrogeological development history of sedimentary basins and a geological period reflecting the specific geochemical environment in which groundwater was formed. According to crustal tectonic movement, hydrodynamic conditions and geophysical and geochemical fields, it can be divided into three stages: sedimentary hydrogeology stage, leaching hydrogeology stage, buried closed hydrogeology stage and tectonic hydrothermal hydrogeology stage. Taking Jizhong depression and Sichuan basin as examples, this paper discusses its significance and has high application value.
Geochemists and petroleum geologists also attach great importance to oilfield hydrogeology and conduct meaningful research. For example, Professor Mei Bowen wrote in Translation Collection of Reservoir Geochemistry (1992) that organic acids and CO2 in oilfield water are the main factors controlling the dissolution and precipitation process of minerals in oil reservoirs. Analyzing and testing their concentration and composition is not only of great significance for predicting secondary pores, but also provides hydrogeochemical basis for taking new technical measures to avoid reservoir damage and scaling. Professor Lin Renzi pointed out in Progress and Application of Reservoir Geochemistry (1995) that with the compression and dehydration of source rocks, a large number of organic acids in source rocks are squeezed out of the reservoir, forming metal organic acid complexes that are usually soluble in water. Therefore, the study of organic acids in oilfield water can predict the occurrence and range of pore development process by geochemical trends on the basis of understanding the formation mechanism of secondary pores. Reservoir Geochemistry, edited by Professor Wang Tieguan, also involves hydrogeochemistry of oil fields. Because oil contains many kinds of compounds, there is a phenomenon of differential distribution among oil, water and mineral matrix. Under the condition of no phase change, the composition of reservoir crude oil is a function of hydrocarbon expulsion composition plus the distribution of water phase and solid phase in migration path. Therefore, we can carefully evaluate the selected compounds such as organic acids, phenols and other compounds in reservoir oil and formation water. On the other hand, the composition of fluids (water, gas and oil) is usually heterogeneous. Weak heterogeneity can be detected by sensitive natural isotope tracer, and reservoir separability can be evaluated by the change of formation water. Researcher Cai Chunfang mainly takes Tarim Basin as the research object, discusses the water-rock interaction in the process of buried diagenesis, and traces the migration and accumulation path of oil and gas according to the chemical composition of oilfield water combined with the change of fluid potential.
Geological fluid analysis is a frontier subject of international geoscience research. Fluids (oil, natural gas and groundwater) are stored in pores and fractures of rocks in sedimentary basins, in which water is the main part. In the field of oil and gas geology, the multi-stage migration, accumulation, diffusion and preservation of oil and gas are all carried out with the participation of groundwater. Analyzing the hydrogeological conditions of sedimentary basins is an effective way to study the law of oil and gas accumulation. Oil and gas prospectors and hydrogeologists in China are working together to carry out research.
Laboratory analysis is an important technical means of oilfield hydrogeology research, and oilfield water analysis and testing laboratories have been established in various oilfields in China. In recent twenty years, with the progress of science and technology, modern analytical and testing instruments and equipment have been constantly updated, and the analytical and testing techniques and methods of oilfield water have been greatly improved and improved, and they are developing in the direction of serialization, standardization and quantification, and a set of relatively perfect analytical and testing methods for oilfield water chemical components have been established, including: sample collection and preservation methods; Field test of unstable components -pH, EH, water temperature, dissolved oxygen, resistivity, hydrogen sulfide, carbon dioxide, etc. Sample pretreatment technology (extraction, enrichment, purification, acidification, etc. ); Analysis of related parameters of rock samples (porosity, permeability, residual salt, etc. ); Analysis methods of organic components in oilfield water (soluble gaseous hydrocarbons, phenolic homologues and aromatic compounds, alkane components, organic acids, etc.). ) has been developed. The isotope analysis technology of hydrogen, oxygen, carbon and strontium in water is introduced. Plasma chromatography analysis of rapid analysis and test of trace elements in oilfield water: the identification and analysis technology of three-dimensional fluorescence and synchronous fluorescence was pioneered. Modern detection instruments such as chromatography (gas phase, liquid phase, color quality, etc.). ), spectrum, infrared, mass spectrometry, etc. Used for chemical analysis of oilfield water. The sensitivity of analysis and the reliability of data are improved. Various oilfields have successively established experimental manuals and regulations for oilfield water analysis, and unified analysis methods. Daqing Oilfield Exploration and Development Research Institute (Huang, Jiang Zongle, etc. , 1995) systematically summarizes the analysis and application of oilfield water. Many innovative papers have been published by oilfield water analysis and laboratory technicians, such as: Analysis Method of Water Asphalt and Its Petroleum Geological Significance (Petroleum Experimental Geology, Wu Deyun,1982); Degassing method of gaseous hydrocarbons in water (Petroleum Experimental Geology, Cui Xiurong,1982); Determination of aromatic hydrocarbons in formation water by ultraviolet absorption spectrum and fluorescence spectrum (Petroleum Experimental Geology, Wu Dajun,1982); Chromatographic analysis method of benzene series in formation water and its petroleum geological significance (Petroleum Experimental Geology, Cai Yingbao,1982); Separation and identification of phenolic compounds in water by TLC (Petroleum Experimental Geology, Wu Dajun,1983); Determination of calcium ion and chloride ion in oilfield water by potentiometric volumetric method (foreign oilfield engineering, Huang, Jiang Zongle, 1989)
After 1980s, hydrogeologists in China Oilfield systematically summarized the characteristics of oilfield hydrogeology, hydrogeologic exploration methods and their functions in oil and gas exploration, and published the following monographs:
1987, Institute of Hydrogeology and Engineering Geology, Ministry of Geology and Mineral Resources, North China Petroleum Exploration and Development Research Institute, Ministry of Petroleum Industry, Petroleum Geology Comprehensive Brigade +00 1 team. Paleohydrogeology and hydrogeochemistry of oil fields. Beijing: Science Press.
1988, Liu Chongxi, Sun Shixiong. Theories and methods of hydrogeochemical petroleum exploration. Beijing: Geological Publishing House.
199 1 year, Liu, Yan. Principles of oilfield hydrogeology. Beijing: Petroleum Industry Press.
199 1 year, de Shi Xiang. Oilfield hydrogeology. Xi 'an: Northwest University Press.
Yang 1993. Hydrogeology of oil and gas fields. Beijing: Petroleum University Press.
1994, Gao Xixing. Oilfield water in China oil-bearing basin. Beijing: Petroleum Industry Press.
1995, Lou zhanghua, Gao Ruiqi, Cai Xiyuan, etc. Analysis of fluid history in Songliao basin. Supplement to petroleum experimental geology.
1997, Cai Chunfang, Mei Bowen, etc. Study on fluid-rock interaction in tarim basin. Beijing: Geological Publishing House.
1998, Huang, Jiang Zongle, etc. Analysis and application of oilfield water. Beijing: Petroleum Industry Press.
1999, Huangfutang. Oil, gas and water geochemistry in Songliao basin. Beijing: Petroleum Industry Press.
1999, translated by Jia et al. Selected papers on oil field rocks and water geochemistry. Beijing: Petroleum Industry Press.
Since the end of the 20th century, the research on petroleum hydrogeology in China has entered a new period with young and middle-aged scientific and technological workers as the main body, who are undertaking arduous production and scientific research tasks to meet the challenges of the new century. The emergence of these young people who are full of vigor and vitality, brave in practice and good at exploration and innovation, as well as the research results of the close combination of production and theory and practice, show the gratifying situation of talents in the field of petroleum hydrogeology in China. In recent years, some hydrogeological research results that solve practical problems in oil and gas prospect prediction and exploration and development have shown a certain level. It indicates that the hydrogeological work in China Oilfield will enter a new period with its own characteristics and serve oil and gas production.
To sum up, China's oilfield hydrogeology work has stepped out of the stage of "learning from foreign countries, following foreign countries and repeating foreign countries". Under the guidance of continental petroleum theory, its research field has been continuously broadened and deepened, from land to sea, from land to sea, from oil to natural gas (including coal-derived gas and biogas), and also involves deep groundwater. The overall research level has been greatly improved, and it has entered the conditions for solving China Oilfield.
It can be seen from the present situation of the above-mentioned oilfield hydrogeology research that the research emphasis of each country is different. Generally speaking, European and American countries attach great importance to the study of hydrodynamic conditions of oil and gas migration and accumulation, and the start or depth of research is much earlier than the study of chemical composition of oil field water; The former Soviet Union was the first country to systematically study the chemical composition of oilfield water and put forward the theory and method of paleohydrogeology research. Starting with studying the characteristics of hydrochemical composition and hydrochemical oil exploration technology in continental oil fields, China has taken the road of combining hydrodynamics with hydrochemistry and studying ancient and modern hydrogeological conditions on the basis of absorbing advanced foreign theories and experiences.