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Acid surface active agent oil well leaking stoppage technology and its formula

An acidic surface and active agent technology, which is applied in the field of acidic surfactant oil well plugging removal technology and formulation, can solve problems such as oil well production instability, achieve the effects of eliminating lattice expansion, good plugging removal effect, and increased production

Active Publication Date: 2006-11-29
PETROCHINA CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an acidic surfactant oil well unblocking process and formula, and use the acidic surfactant oil well unblocking process to solve the problem of oil well production "instability"

Method used

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Examples

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Embodiment

[0033] Embodiment: Utilize the present invention to use in several wells, all receive obvious effect of increasing oil. Take well Zhao 57-35 as an example for illustration. Well Zhao 57-35 is an oil well that has caused pollution. Prepare 60m for this well 3 , a concentration of 0.5% acidic surfactant solution.

[0034] The acidic surfactant formula is: polyoxyethylene polyoxypropylene propylene glycol ether: 19.8%; polyoxyethylene polyoxypropylene phenamine resin: 22.4%; FC-N01 fluorocarbon surfactant: 0.035%; FC-3B fluorocarbon surface Active agent: 0.05%; hydrochloric acid: 4.3%; nitric acid: 2.7%; water: 50.715%.

[0035] Preparation process: First, the four raw materials of polyoxyethylene polyoxypropylene propylene glycol ether, polyoxyethylene polyoxypropylene phenamine resin, FC-N01 fluorocarbon surfactant, and FC-3B fluorocarbon surfactant are added according to the above ratio. 2000L normal pressure enamel reaction kettle with stirring, heating, cooling and vacuu...

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PUM

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Abstract

The invention relates to a technique used acidity surfactant to remove oil well blocking and its formula and manufacturing method. The feature of the acidity surfactant formula is that its material weight ratio is as follows: polyoxy propylene-polyoxy ethylene glycerin ether 10-40%, polyoxy propylene-polyoxy ethylene phenol amine resin 10-45%, FC-NO1 fluorocarbon surfactant 0.0001%-0.035%, FC-3B fluorocarbon surfactant 0.0001%-0.05%, hydrochloric acid 3-10%, nitric acid 2-10%, and water 30-55%. The feature of the technique is as follows: the made-up 0.4%-0.6% acidity surfactant can be injected from hollow while running; then it can be replaced by 10-20m3 clear water. The invention has good effect and can improve yield.

Description

Technical field [0001] The invention relates to a process for removing plugging of oil wells by using an acidic surfactant, a formula of the acidic surfactant and a preparation method thereof. Background technique [0002] As the production time of oil wells prolongs, oil wells need pump inspection operations. In order to ensure the safety of the pump inspection operation and the smooth progress of the pump inspection work, it is necessary to use CaCl before the pump inspection operation. 2 or CaBr 2 Kill well with aqueous solution or use oilfield sewage to kill well. After the well killing operation caused some oil wells to check the pump, the production was extremely reduced. This is due to CaCL 2 or CaBr 2 The aqueous solution or oilfield sewage pollutes the strata twice during the process of killing the well, causing alkali-sensitive and water-sensitive effects in the stratum. To restore oil well production, the usual measure is acidizing the oil well. However, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/50
Inventor 付亚荣蔡远红马永忠刘建华
Owner PETROCHINA CO LTD
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