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Efficient cleanup additive for gas well and preparing method of efficient cleanup additive

A drainage aid and gas well technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem that the advantages of formation rock contact angle and surface tension cannot be taken into account, the wetting improvement effect is not obvious, and drainage aids It can reduce the damage of low-permeability gas layer intrusion into water, reduce the variety of raw materials, and reduce the cost.

Inactive Publication Date: 2014-05-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: the existing drainage aids are expensive, the preparation process is complicated, and the advantages of the contact angle and surface tension with the formation rock cannot be taken into account. The improvement effect is not obvious, and the drainage effect is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Configure raw materials according to the following volume percentages:

[0026] Perfluoroalkylbutanamide-propyldimethylamine ammonium chloride-sodium sulfonate solution 2%; analytically pure ethanol solution 5%; methyl propyl dibutyl fatty acid ammonium 2%; water 91%;

[0027] Preparation:

[0028] Add 2% of the main agent perfluoroalkylbutanamide-propyldimethylamine ammonium chloride-sodium sulfonate solution into the reactor, heat it to 80°C and keep it warm, then add 5% ethanol solution, 2% The methyl propyl dibutyl fatty acid ammonium, 91% water, the stirring speed is 500 rpm, mix evenly, at 80 ℃, continue to react for 5 hours, the obtained colorless transparent liquid is the high-efficiency gas well drainage aid .

[0029] Among them, the main agent is purchased from Qingyang Changqing Downhole Oilfield Auxiliary Co., Ltd.

Embodiment 2

[0031] Perfluoroalkylbutanamide-propyldimethylamine ammonium chloride-sodium sulfonate solution 5%; analytically pure ethanol solution 8%; methyl propyl dibutyl fatty acid ammonium 3%; water 84%;

[0032] Preparation:

[0033] Add 5% of the main agent perfluoroalkylbutanamide-propyl dimethylamine ammonium chloride-sodium sulfonate solution to the reactor, heat it to 100°C and keep it warm, then add 8% ethanol solution, 3 % of methyl propyl dibutyl fatty acid ammonium, 84% of water, stirring speed of 800 rpm, mixing evenly, at 100 ℃, continuous reaction for 3 hours, the obtained colorless and transparent liquid is the high-efficiency gas well drainage aid agent.

Embodiment 3

[0035] Perfluoroalkylbutanamide-propyldimethylamine ammonium chloride-sodium sulfonate solution 3%; analytically pure ethanol solution 6%; methyl propyl dibutyl fatty acid ammonium 2%; water 89%;

[0036] Preparation:

[0037] Add 3% of the main agent perfluoroalkylbutanamide-propyldimethylamine ammonium chloride-sodium sulfonate solution into the reactor, heat to 80°C and keep it warm, then add 6% ethanol solution, 2.0% Methyl propyl dibutyl fatty acid ammonium, 89% water, stirring speed 600 rev / min, mix well, keep reacting at 90°C for 4 hours, the obtained colorless transparent liquid is the high-efficiency gas well drainage aid .

[0038] The preparation process of the invention is simple, the material is easy to obtain, and has obvious effects on reducing the damage of water intrusion into low-permeability gas layers. The use of the drainage aid for gas well fracturing reduces the surface tension and increases the contact angle. Use K100 to measure the surface tension of...

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Abstract

The invention discloses an efficient cleanup additive for a gas well and a preparing method of the efficient cleanup additive. The method comprises the following steps: adding 2-5% by volume of a base agent namely perfluoro alkyl butyrylamide-propyl dimethylamine ammonia chloride-sodium sulfonate into a reactor; uniformly mixing, heating, keeping the temperature in the reactor between 80 DEG C and 100 DEG C, and then adding 5-8% by volume of ethanol, 84-91% by volume of water and 2-3% by volume of methyl propyl dibutyl fatty acid ammonium; reacting for 3 to 5 hours while agitating so as to obtain colorless transparent liquid. The preparing technology is simple, the materials are easy to obtain, and the effect of reducing the damage of aggressive water to a hyposmosis gas reservoir is obvious; through the adoption of the cleanup additive for gas well fracturing, the surface tension and extrusion pressure are reduced, and the backflow of operational liquid is facilitated.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to a high-efficiency gas well drainage aid and a preparation method thereof. Background technique [0002] Changqing Oilfield is a typical low-pressure and low-permeability oilfield, so acid fracturing is one of the important measures to increase production and injection. The performance of fracturing fluid is an important factor affecting the success or failure of fracturing construction and the effect of stimulation. The entry of water-based fracturing fluid into the reservoir can cause hydration, expansion, dispersion and migration of clay minerals, and the remaining operating fluid may be absorbed by the formation capillary, causing damage to the formation. The formation pressure is generally not enough to overcome the capillary resistance and cannot discharge the working fluid from the pore channels, so it is necessary to use a drainage aid to reduce the surface and inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/64
CPCC09K8/68
Inventor 吕小明赵振峰李宪文丁里尹晓宏石华强李小玲古永红
Owner PETROCHINA CO LTD
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