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Formula and preparation method of low-pressure gas field old well re-production liquid locking removal treatment agent

A treatment agent and surface treatment agent technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of rock surface wettability, short effective period, etc., to achieve excellent performance of reducing the surface tension of the solution, reducing the Effect of lipophilicity and contact angle improvement

Active Publication Date: 2020-12-04
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

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, to provide a formulation and preparation method of an old well in a low-pressure gas field to re-produce and release liquid locks, and to overcome the high salinity caused by the long-term accumulation of liquid in the reservoir in the prior art , The effect of oil-water two-phase emulsified mixture on the wettability of the rock surface near the wellbore, and the short effective period of the rock surface after treatment, etc.

Method used

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  • Formula and preparation method of low-pressure gas field old well re-production liquid locking removal treatment agent
  • Formula and preparation method of low-pressure gas field old well re-production liquid locking removal treatment agent
  • Formula and preparation method of low-pressure gas field old well re-production liquid locking removal treatment agent

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specific Embodiment approach

[0027] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope covered by the technical contents disclosed in the present invention without affecting the functions and objectives of the present invention.

[0028] At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without any su...

Embodiment 1

[0030] The invention discloses a formula of a treatment agent for resuming production of an old well in a low-pressure gas field, which consists of the following components in terms of weight percentage: 0.1-0.4% of a surface treatment agent, 0.05-0.3% of a nano-material, and 3% of a dispersant ~8%, cleaning agent 10~18%, mutual solvent 18~32%, wetting reversal agent 2~12%, industrial tap water to make up the balance.

Embodiment 2

[0032] Preferably, the components are: surface treatment agent 0.15-0.3%, nano-material 0.1-0.2%, dispersant 3.5-7%, cleaning agent 11-17%, mutual solvent 20-30%, wet inversion 5-10% of the agent, and industrial tap water to make up the balance.

[0033] Preferably, the components are: 0.2% surface treatment agent, 0.15% nanomaterial, 5% dispersant, 15% cleaning agent, 25% mutual solvent, 8% wetting reversal agent, and industrial tap water to make up the balance.

[0034] Preferably, the surface treatment agent is composed of perfluorooctane sulfonate tetraethylamine and perfluorooctyl quaternary ammonium iodide, wherein perfluorooctane sulfonate tetraethylamine and perfluorooctyl quaternary ammonium iodide The weight ratio is 2:1.

[0035] Preferably, the nano-material is nano-polysilicon, and its model is MGS-W.

[0036] Preferably, the dispersant is composed of phenyl polytrimethicone, polyether modified polydimethylsiloxane and chlorodifluoromethyl trimethylsilane, where...

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Abstract

The invention discloses a formula and a preparation method of a low-pressure gas field old well re-production liquid locking removal treatment agent. The low-pressure gas field old well re-productionliquid locking removal treatment agent comprises the following components by weight: 0.1-0.4% of a surface treatment agent, 0.05-0.3% of a nanometer material, 3-8% of a dispersant, 10-18% of a cleaning agent, 18-32% of a mutual solvent, 2-12% of a wetting reversal agent, and the balance industrial tap water. The treating agent can reduce liquid surface tension and oil-water interfacial tension ofa near wellbore area, reduce capillary resistance of a liquid, improve the contact angle of the liquid and rock and change rock surface wettability, and the effective period of the treated rock surface is prolonged through the dual adsorption effect of a nano material and a surfactant.

Description

technical field [0001] The invention belongs to the technical field of plugging removal and production increase of old wells in gas fields and reservoir protection and reformation, and specifically relates to a formula and a preparation method of a treatment agent for reproducing old wells in low-pressure gas fields and releasing liquid locks, which are used for restoring the single well productivity of old wells. Background technique [0002] The low-pressure gas field mainly comes from the middle and late stage of gas field production. With the increase of cumulative recovery, the formation energy of the gas field gradually decreases, and the old wells of the gas field show a phenomenon of low pressure. For example, some gas wells in the existing gas field have low accumulative production degree, and after the recovery degree reaches only 50-60% of the controlled reserves of a single well, the wellhead has already appeared in a state of low production and low pressure, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/58C09K8/524
CPCC09K8/584C09K8/58C09K8/524C09K2208/10C09K2208/28C09K2208/12
Inventor 蒋文学李勇胡燕子陈平李志航郑维师金娜王坤苏伟东武月荣黄永章陈迎花张弢谭欢尹虎琛李珊荆建春李丹
Owner BC P INC CHINA NAT PETROLEUM CORP
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