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A kind of deep oil reservoir profile control agent with high salinity resistance and preparation method thereof

A profile control agent, high resistance technology, applied in the field of profile control water plugging agent, can solve the problems of short validity period, poor stability, difficult to popularize and apply on a large scale, and achieve controllable plugging strength and good resistance to high salinity. , the preparation method is simple and effective

Active Publication Date: 2021-03-09
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The chemical profile control and water plugging technology is the key technology to stabilize oil production and control water in the development of water injection reservoirs. However, the chemical plugging control formula system for high salinity reservoirs is still a technical problem to be studied. The existing water plugging and profile control agents are generally There are technical problems such as weak formula system strength, poor stability, and short validity period, making it difficult to achieve large-scale promotion and application

Method used

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  • A kind of deep oil reservoir profile control agent with high salinity resistance and preparation method thereof
  • A kind of deep oil reservoir profile control agent with high salinity resistance and preparation method thereof
  • A kind of deep oil reservoir profile control agent with high salinity resistance and preparation method thereof

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preparation example Construction

[0026] In another specific embodiment of the present invention, a kind of preparation method of profile control agent in the deep part of reservoir resistant to high salinity is provided, and the preparation method may comprise the following steps:

[0027] The pre-slug I, oil-displacement slug II and strengthening slug III were respectively prepared to obtain a profile control agent in deep reservoirs resistant to high salinity. What needs to be explained here is that the profile control agent for deep reservoirs resistant to high salinity in this specific embodiment includes three parts: pre-slug I, oil displacement slug II and strengthening slug III. The three parts of oil slug II and strengthening slug III together constitute the profile control agent in deep reservoirs with high salinity tolerance. Among them, the front slug I, the oil displacement slug II and the strengthening slug III can be used independently or in combination.

[0028] Wherein, pre-slug I is prepared...

Embodiment 1

[0035] This example provides a high-salinity resistant profile control agent in deep reservoirs, whose raw material composition includes pre-slug I, oil-displacement slug II and strengthening slug III with a volume ratio of 5:1:5; in,

[0036] Taking the total weight of the front slug I as 100%, the raw material composition of the front slug I is:

[0037]

[0038] In the preceding slug I, the modulus of the water glass solution used is 3.2.

[0039] Taking the total weight of the oil-displacement slug II as 100%, the raw material composition of the oil-displacement slug II is:

[0040] Foaming agent ZK-25120 0.4%

[0041] Betaine 0.2%

[0042] remaining water.

[0043] Taking the total weight percentage of the reinforced slug III as 100%, the raw material composition of the reinforced slug III is:

[0044]

[0045] The salinity of water used in the pre-slug I, oil-displacement slug II and strengthening slug III in the profile control agent is 4800mg / L.

[0046] Th...

Embodiment 2

[0061] This example provides a high salinity resistant profile control agent in the deep part of the reservoir, and its raw material composition includes pre-slug I, oil-displacing slug II and strengthening slug III with a volume ratio of 4:0.8:5; in,

[0062] Taking the total weight of the front slug I as 100%, the raw material composition of the front slug I is:

[0063]

[0064] In the preceding slug I, the modulus of the water glass solution used is 3.

[0065] Taking the total weight of the oil-displacement slug II as 100%, the raw material composition of the oil-displacement slug II is:

[0066] Foaming agent ZK-25120 0.3%

[0067] Betaine 0.15%

[0068] remaining water.

[0069] Taking the total weight percentage of the reinforced slug III as 100%, the raw material composition of the reinforced slug III is:

[0070]

[0071] The salinity of water used in the pre-slug I, oil-displacement slug II and strengthening slug III in the profile control agent is 4800mg...

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Abstract

The invention provides a high hypersalinity-resistant profile control agent for a deep part of an oil reservoir and a preparation method thereof. The profile control agent comprises a front section plug I, a displacement section plug II and a reinforcement section plug III having a volume ratio of (4-5):(0.8-1):(4-5). The invention also provides a preparation method of the above profile control agent. The profile control agent can be used for deep profile control and water plugging of the high-salinity oil reservoir, the profile control agent has good stability, and the plugging performance can be controlled.

Description

technical field [0001] The invention relates to a profile control and water shutoff agent, in particular to a profile control agent for the deep part of oil reservoirs resistant to high salinity, and belongs to the technical field of petroleum exploitation. Background technique [0002] The chemical profile control and water plugging technology is the key technology to stabilize oil production and control water in the development of water injection reservoirs. However, the chemical plugging control formula system for high salinity reservoirs is still a technical problem to be studied. The existing water plugging and profile control agents are generally There are technical problems such as weak formulation system strength, poor stability, and short validity period, making it difficult to realize large-scale popularization and application. [0003] Therefore, it is necessary to provide a deep-seated reservoir that can effectively block the large pores and water channeling chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/514C09K8/506C09K8/584C09K8/508
CPCC09K8/5045C09K8/506C09K8/5086C09K8/514C09K8/584
Inventor 刘强孙守国王浩龙华李瑞马昌明黄麒钧马凤春郑猛张群吴晓明王磊陈小凯王尧吴享远刘建山郝英敏管紫君
Owner PETROCHINA CO LTD
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