A formula of a low-pressure gas field old well recovery liquid lock treatment agent and its preparation method

A technology of treating agent and surface treating agent, applied in chemical instruments and methods, drilling composition, etc., can solve the problems of short effective period and influence of rock surface wettability, etc. Tension, the effect of prolonging the effective period

Active Publication Date: 2022-07-05
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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  • A formula of a low-pressure gas field old well recovery liquid lock treatment agent and its preparation method
  • A formula of a low-pressure gas field old well recovery liquid lock treatment agent and its preparation method
  • A formula of a low-pressure gas field old well recovery liquid lock treatment agent and its preparation method

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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 cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with this technology, and are not used to limit the conditions that the present invention can be implemented. Any structural modification, proportional relationship change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and purpose of the present invention.

[0028] At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and clarity, and are not used to limit this specification. The implementable scope of the invention, and the change or adjustment of the relative relationship thereof, shall also be regarded as the implementable scope of the p...

Embodiment 1

[0030] The invention discloses a formula of a treatment agent for re-production and unlocking of an old well in a low-pressure gas field. In terms of weight percentage, it consists of the following components: 0.1-0.4% of a surface treatment agent, 0.05-0.3% of a nanomaterial, 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%, nanomaterial 0.1-0.2%, dispersant 3.5-7%, cleaning agent 11-17%, mutual solvent 20-30%, wetting reversal agent 5-10%, industrial tap water to make up the balance.

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

[0034] Preferably, the surface treatment agent is composed of tetraethylamine perfluorooctanesulfonate and quaternary perfluorooctylamine iodide, wherein tetraethylamine perfluorooctylsulfonate and quaternary perfluorooctylamine iodide The weight ratio is 2:1.

[0035] Preferably, the nanomaterial is nanopolysilicon, and its model is MGS-W.

[0036] Preferably, the dispersant is composed of phenyl trimethicone, polyether-modified polydimethylsiloxane and chlorodifluoromethyltrimethylsilane, wherein pheny...

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Abstract

The invention discloses a formula of a low-pressure gas field old well re-production unlocking treatment agent and a preparation method thereof, which, in terms of weight percentage, are composed of the following components: 0.1-0.4% of a surface treatment agent, 0.05-0.3% of a nanomaterial %, dispersant 3-8%, cleaning agent 10-18%, mutual solvent 18-32%, wetting reversal agent 2-12%, industrial tap water to make up the balance. The liquid unlocking treatment agent of the invention can reduce the liquid surface tension and the oil-water interfacial tension in the near-wellbore zone, reduce the capillary resistance of the liquid, increase the contact angle between the liquid and the rock, and change the wettability of the rock surface. , prolong the effective period of rock surface treatment.

Description

technical field [0001] The invention belongs to the technical field of blockage removal and production enhancement and reservoir protection and transformation of old wells in gas fields, and particularly relates to a formulation of a low-pressure gas field old well reproducing liquid lock treatment agent and a preparation method thereof, which are used to restore the single well productivity of old wells. Background technique [0002] Low-pressure gas fields mainly come from the middle and late stages of gas field production. With the increase of the cumulative recovery degree, the formation energy of the gas field gradually decreases, and the old wells in the gas field show a phenomenon of low pressure. For example, if the cumulative production of some gas wells in the existing gas field is low, and the recovery degree only reaches 50-60% of the controlled reserves of a single well, the wellhead has been in a state of low production and low pressure. Reservoir accumulation ...

Claims

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Application Information

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Patent Type & Authority Patents(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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