He Xinpeng Peng Liu Qingsheng Street, Guohua Xiao

(Institute of Oil Production Technology, Jianghan Oilfield Company)

Aiming at the technical problem that the original mechanical layered production string can not meet the production needs in the later stage of oilfield development, Jianghan Petroleum Company

According to the characteristics of different reservoirs in different development stages, the Research Institute of Oil Production Technology of Tian Branch Company has developed a description of supporting layered oil production string, hydraulic pressure

Regulating water plugging crossing pipe string, electric switch subdivision water plugging integrated pipe string, high salt casing plugging mixed hydrolysis basin layered oil production pipe.

The damaged wells (low-pressure oil wells) protect the production string. The structure, working principle, technical characteristics and field application of the pipe string are introduced.

Conditions.

Keywords: production string for layered production and high water cut development

In the later stage of oilfield development, the water content of most oil wells increased, such as rivers.

At present, the comprehensive water cut of Han Oilfield is 83.5%, and Bamianhe Oilfield is comprehensive.

The water content reaches 90.3%. In order to improve the development benefit, slicing mining is adopted.

Water control by oil technology has become one of the main measures to stabilize and increase production in oil fields.

One. Due to the complex geological conditions of the reservoir and the deterioration of well conditions, the original

The application of mechanical layered pipe string shows poor adaptability and success rate.

Low problem, therefore, in recent years, Jianghan Oil Production Technology Research Institute according to the oil

According to the characteristics of different reservoirs and different well conditions, the corresponding mechanical stratification is formulated.

After field application, the oil production string can effectively reduce the water cut of the oil well.

Water meets the requirements of research and design.

1 Anchored support layered production string

The relationship between oil layer and water layer adopts the original mechanical layered production string.

Clear two to three layers of heterogeneous oil wells, there is a single specification in the application,

Low technical index and poor working reliability. To this end, in the tube

Support and slip packer are added to the pipe string, and the system is studied and applied.

Other supporting tools are suitable for layered oil production pipes with different casings.

Column.

Structure and technological principle of 1. 1

1. 1. 1 structure

The pipe string is mainly composed of a drop joint, a Y34 1 water seal spacer and a pipe string.

Support, screen plug, etc. Seal the production string, as shown in figure 1

See Figure 2 for the lower production string, and Figure 3 for the upper production string in the sealed middle, and seal it.

The intermediate production string is shown in Figure 4.

The principle of 1. 1.2

Lower the matching water plugging production string to the design position, and connect it with

A hydraulic setting packer is added to the tubing to isolate the annulus of the tubing and realize layered production of the oil layer. At the same time, the matching device matched with the pipe string is stuck.

After that, support the water plugging string on the casing to prevent it from over-exploitation.

It slipped in the process. Continue to increase the hydraulic pressure to 20MPa and open the setting ball.

A block connected to the production layer; Throw a steel ball into the tubing, press it in and straighten it.

Press until the pressure drops suddenly or the casing returns a lot of water, so that it misses and blocks the water pipe string.

The first author and introduction of Xin Peng, male, born in 1965, engineer, lives in Jiang.

Korea Oil Production Institute is engaged in the research of mechanical oil production and downhole tools.

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