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Continuous mixing type water plugging technique

A process method and mixing technology, applied in chemical instruments and methods, earthwork drilling and production, wellbore/well components, etc., can solve the problems of increased manpower and equipment burden, poor plugging effect, short validity period, etc., and achieve good The effect of applying the foreground

Active Publication Date: 2013-02-13
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the technical problems of poor plugging effect and short validity period caused by injecting plugging agent with large displacement in the conventional water plugging technology, and also solves the long construction period and increased Manpower and equipment burden, especially the technical problems of residual liquid treatment after construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The invention discloses a continuous mixing type water shutoff process, comprising the following steps:

[0023] a. Take 2-10 parts of the main plugging agent and 100 parts of clean water to form a main plugging agent solution and inject it into the formation, wherein 100 parts of clean water does not include the clean water used in step b below;

[0024] b. Use clean water to replace all the main plugging agent solution in the wellbore into the oil well reservoir;

[0025] c. Shut the well and wait for condensation. The main plugging agent solution will form a high viscoelastic gel after reacting for 3-24 hours at a temperature of 30-90°C, blocking the water flow channels of micro-fractures and matrix in the reservoir, and realizing water flooding Effective plugging of oil wells;

[0026] d. Well pumping, according to the oil field pumping standard procedure, the oil well is pumped and put into production.

[0027] In this embodiment, the main plugging agent used may...

Embodiment 2

[0029] The invention discloses a continuous mixing type water shutoff process, comprising the following steps:

[0030] a. Take 2-10 parts of the main plugging agent and 100 parts of clean water to form a main plugging agent solution and inject it into the formation, wherein 100 parts of clean water does not include the clean water used in step b below;

[0031] b. Use clean water to replace all the main plugging agent solution in the wellbore into the oil well reservoir;

[0032] c. Shut the well and wait for condensation. The main plugging agent solution will form a high viscoelastic gel after reacting for 3-24 hours at a temperature of 30-90°C, blocking the water flow channels of micro-fractures and matrix in the reservoir, and realizing water flooding Effective plugging of oil wells;

[0033] d. Open the well for pumping, put into production directly after verifying the effect of water shutoff or take other measures to increase production.

[0034] The main blocking agen...

Embodiment approach

[0037] As the best implementation mode of the present invention, it comprises the following steps:

[0038] a. Take 2-10 parts of the main plugging agent and 100 parts of clean water to form a main plugging agent solution and inject it into the formation, wherein 100 parts of clean water does not include the clean water used in step b below;

[0039] b. Use clean water to replace all the main plugging agent solution in the wellbore into the oil well reservoir;

[0040] c. Shut the well and wait for condensation. The main plugging agent solution will form a high viscoelastic gel after reacting for 3-24 hours at a temperature of 30-90°C, blocking the water flow channels of micro-fractures and matrix in the reservoir, and realizing water flooding Effective plugging of oil wells;

[0041] d. Open the well for pumping, put into production directly after verifying the effect of water shutoff or take other measures to increase production.

[0042] The main blocking agent is a mixtu...

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Abstract

The invention discloses a continuous mixing type water plugging technique, which comprises the following steps of: a, taking and mixing 2-10 parts of main-body plugging agent and 100 parts of clear water so as to form a main-body plugging agent liquid, and then injecting the main-body plugging agent liquid into a stratum; b, enabling the main-body plugging agent liquid in a shaft to enter into a reservoir stratum of an oil well by using clear water in an overhead mode; c, closing the well to wait for coagulation, namely, the main-body plugging agent liquid is formed into high-viscosity elastic gel after being reacted for 3-24 hours at a temperature of 30-90 DEG C, and the high-viscosity elastic gel blocks micro fractures and water passageways for matrixes in the reservoir stratum, thereby realizing the effectively blocking on the water-logging oil well; and d, opening the well and carrying out pumping, carrying out pumping on the oil well according to standard oil well pumping procedures and putting the oil well into operation. Compared with the prior art, the technique disclosed by the invention solves the technical problem that in the conventional water plugging technologies, due to the injection of a large mount of plugging agents, phenomena such as poor blocking effect and short period of validity are easy to cause; meanwhile, the technique also solves the technical problem that the existing single injection type water plugging process is long in construction period, so that the manpower and equipment burdens, especially the treatment of residual liquid after the construction is completed, are increased.

Description

[0001] technical field [0002] The invention relates to the technical field of petroleum exploitation, in particular to an oil well water control, oil stabilization and production increase transformation process, in particular to a continuous mixing type water shutoff process. Background technique [0003] In the development process of low-permeability oilfields, due to the long-term advanced water injection development and the influence of formation fractures (natural micro-fractures and artificial fracturing fractures), the formation heterogeneity is extremely serious, so that the injected water often flows along high-permeability fractures, while This low-efficiency water injection not only affects the degree of crude oil recovery, but also increases the cost of oil recovery due to energy consumption, treatment of produced fluid, and corrosion of pipelines. In order to block the high-permeability water layer, various plugging methods are disclosed in the prior art, among...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13C09K8/44
Inventor 任雁鹏王玉功李勇王忍峰王小文汪小宇葛海江唐冬珠蒋文学荆建春
Owner BC P INC CHINA NAT PETROLEUM CORP
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