Horizontal well sand prevention and water control pipe string and oil production increasing method

A technology for horizontal wells and water control pipes, which is used in earth-moving drilling, wellbore/well components, and production fluids, etc., can solve the problems of rapid water cut rise, high oil production water cut, and high implementation costs, reducing processing costs, The effect of improving oil recovery and improving water control effect

Active Publication Date: 2021-02-02
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a horizontal well sand control water control pipe string and its oil increasing method, which is used to solve the problem of complicated construction, high implementation cost and rapid increase of water content caused by the need for additional equipment or measures in the existing water control methods , high water content in oil production, etc.

Method used

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  • Horizontal well sand prevention and water control pipe string and oil production increasing method
  • Horizontal well sand prevention and water control pipe string and oil production increasing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 provides a sand control and water control pipe string for a horizontal well, and its structure will be described in detail below.

[0032] refer to figure 1 , the horizontal well sand control and water control pipe string includes a reservoir 100, a horizontal well, a sand control pipe assembly 2, and several packers 3.

[0033] Petroleum is stored in the reservoir 100 , and the horizontal well includes a horizontal part and a wellhead part. The wellhead part and the horizontal part are connected together from outside to inside and extend to the horizontal part of the horizontal well to penetrate into the reservoir 100 .

[0034] A number of sequentially connected water plugging test sections 1 are selected in the horizontal part of the horizontal well and the surrounding reservoir 100 .

[0035] The wellhead of the horizontal well is provided with an oil pipeline 10 , and the inlet end of the oil pipeline 10 is docked with the oil outlet end of the inner ...

Embodiment 2

[0049] In order to drain more and more water in the support particle layer 22, on the basis of embodiment 1, embodiment 2 is improved for the support particle layer 22, and the support particle layer 22 of embodiment 2 is improved to a drainage type, The specific structure is as follows:

[0050] refer to figure 2 , the support particle layer 22 is provided with an annular filter 220, and the annular filter 220 separates the support particle layer 22 with an annular part 221 with more oil and less water and an annular part with less oil and water 222, wherein the annular part with more oil and less water 221 is close to the inner pipe 21, and the less-oil-more-water annular portion 222 is closer to the outer pipe 23. A drain blind pipe 223 is horizontally arranged in the less-oil-more-water annular portion 222, and the outlet of the drain blind pipe 223 is provided with Water blocking valve 224.

[0051] When the oil-water mixture is exported to the later stage, since the o...

Embodiment 3

[0053] Embodiment 3 provides a method for increasing oil in a horizontal well, using the sand control and water control pipe string of the horizontal well provided in Embodiment 1, the method includes the following steps:

[0054] Step A: selecting the water plugging experiment section 1 in the horizontal part of the horizontal well and the surrounding reservoir 100;

[0055] Step B: preparing the sand control pipe assembly 2, which specifically includes the following steps:

[0056] Step B1: dividing the water blocking experiment section 1 into multiple water blocking sections;

[0057] According to the principle that well sections with similar permeability are divided into one section, the water plugging test section 1 is divided into the first experimental section, the second experimental section, ..., the nth experimental section, wherein n is a natural number greater than 1;

[0058] Step B2: divide the pipe wall of the outer pipe 23 into a plurality of partitions accord...

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Abstract

The invention discloses a horizontal well sand prevention and water control pipe string and an oil production increasing method. The pipe string comprises a sand prevention pipe assembly and a plurality of packers; the sand prevention pipe assembly comprises an inner pipe, a supporting particle layer and an outer pipe; and a hydrophobic oleophylic laminating propping agent is arranged in the supporting particle layer. The method comprises the steps that a water plugging experimental section is selected from a horizontal part of a horizontal well and a reservoir around the horizontal part; thesand prevention pipe assembly is prepared; the sand prevention pipe assembly is installed, and a plurality of packing sections are arranged; and oil in the reservoir is gradually conveyed out, and theoutput of water is controlled. According to the horizontal well sand prevention and water control pipe string and the oil production increasing method, after an oil layer discharges water, an instrument or a tool does not need to be lowered to independently find and control water, the oil layer can be effectively prevented from producing water and allowing oil to pass through the hydrophobic oleophylic laminating propping agent, the productivity is not affected, manual intervention is not needed, and operation procedures are reduced. The method not only can prevent sand, but also can controlwater and convey oil; and the method is simple and effective and has remarkable economic benefits and social benefits.

Description

technical field [0001] The invention relates to oil and gas sand control and water control technology for a large oil and gas processing system, in particular to a horizontal well sand control and water control pipe string and an oil increasing method thereof. Background technique [0002] During the development of Bohai Oilfield, the water cut rises rapidly after the production well is put into production, and with the increase of liquid production rate, the unevenness of liquid production intensity in the entire horizontal well section increases, which easily leads to the problem of early water coning. With the lengthening of the horizontal section of the horizontal well, the problem of water coning in the edge water and the bottom becomes more prominent, and the water cut of some sand producing wells reaches more than 90% at the initial stage of production, resulting in uneven production of the target reservoir, rapid rise of water cut, and short stable production period. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B43/04E21B43/08E21B33/12
CPCE21B33/12E21B43/00E21B43/04E21B43/082E21B43/086
Inventor 邓金根董星亮刘书杰李中马英文马成云
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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