Phase permeability modifier for oil field fracturing and preparation method thereof

A phase permeability regulator and oil field fracturing technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as unsatisfactory phase permeability adjustment effect, achieve excellent selective water control performance and loose use conditions , the effect of good flowback performance

Active Publication Date: 2019-07-23
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

[0003] The invention provides a phase permeability regulator for oil field fracturing and its preparation method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of unsatisfactory phase permeability adjustment effect in the prior art

Method used

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  • Phase permeability modifier for oil field fracturing and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, the raw material of this oilfield fracturing phase permeability regulator includes 1% to 4% emulsifier, 8% to 10% diesel oil, 0.07% to 0.2% initiator and the remainder of the polymerization monomer and the remaining amount of water, wherein the weight ratio of polymerized monomers to water is 5:2 to 45:7.

Embodiment 2

[0020] Embodiment 2, the raw material of this oil field fracturing phase permeability modifier includes 1% or 4% emulsifier, 8% or 10% diesel oil, 0.07% or 0.2% initiator and the polymerization monomer and the remainder amount of water, wherein the weight ratio of polymerized monomers and water is 5:2 or 45:7.

Embodiment 3

[0021] Example 3, as an optimization of Example 1 and Example 2, the polymerized monomers are acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, N, N-dimethylacrylamide in a weight ratio of 3 to 4 : 6 to 7: a mixture of 2 to 3; or / and, the emulsifier is a mixture of Span 80 and Tween 80 in a weight ratio of 3 to 4:7 to 9; or / and, the diesel oil is No. 0 diesel oil; or / and, the initiator is ammonium persulfate.

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Abstract

The invention relates to the technical field of oilfield fracturing fluid additives, and discloses a phase permeability modifier for oilfield fracturing and a preparation method thereof. The phase permeability modifier for oilfield fracturing is prepared from the following raw materials: an emulsifying agent, diesel oil, an initiator, a polymeric monomer and water. A reservoir or middle and high water cut oilfields with complicated oil-water relationships can realize the effects of reducing the oil well water yield, improving the oil pump capacity and achieving water control and oil increase, so that the productivity of oil is improved; the phase permeability modifier is a long-chain high-molecular polymer, can effectively increase the water-phase permeability, is little in influence on oil-phase permeability, and has high selectivity water control performance; besides, the phase permeability modifier has high back-displacement performance and relatively high adsorption capacity; compared with the prior art, the drag reduction phase permeability modification performance is more excellent, and the oil well yield can be increased by more than 10%; and moreover, the phase permeability modifier is simple in production and loose in using condition, so that the phase permeability modifier can be widely applied to fracturing production increasing technique of oil-water layer reservoir phase permeability fracturing.

Description

technical field [0001] The invention relates to the technical field of oilfield fracturing fluid additives, and relates to a phase permeability modifier for oilfield fracturing and a preparation method thereof. Background technique [0002] Oilfield fracturing is a method of using hydraulic action (injecting fracturing fluid into oil and gas wells to form high pressure) to form cracks in the oil layer, also known as oil layer hydraulic fracturing. Hydraulic fracturing is the most mature reservoir transformation used in various oil and gas fields at present. In the process of developing oil-water reservoirs in the same layer, too high water yield and too little oil yield have always been an urgent problem to be solved. With the development of science and technology and the needs of application, in the development of new fracturing process, Water-controlled fracturing has become a topic of concern in many fields. Permeability modifier is the main additive of permeable fractur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/58C08F220/56C08F222/38C09K8/68
CPCC08F220/58C08F220/585C09K8/68C09K8/882C08F220/56C08F222/385
Inventor 曹华宝蒲松龄张贵仪王志勇张抒夏戴蕾王肃凯
Owner BC P INC CHINA NAT PETROLEUM CORP
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