Modifier for preventing bittern scaling

A modifier and brine technology, applied in the field of oil field development, can solve the problems of formation scaling, aggravation, plugging and corrosion, etc., and achieve the effects of strong flowback ability, low consumption and cost saving

Active Publication Date: 2016-04-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects existing in the prior art, the present invention provides a modifier for preventing brine scaling, which is mainly used in workover operations in the oil field development process, and utilizes the effects of various chemical components to prevent brine killing fluid from Scaling, which solves the problems of formation scaling, clogging and corrosion aggravation when brine is used as well killing fluid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present embodiment provides a kind of modifying agent that prevents bittern fouling, and its component quality formula is composed of: 10-20 parts of tetrasodium 2-phosphonic acid butane-1,2,4-trihydroxy acid; sodium polyacrylate 5 -10 parts; 2-3 parts of coconut acid diethanolamide; 0.2-0.5 parts of polyether modified silicon; the rest is water (distilled water).

[0028] For example, the component quality formula composition of the modifying agent for preventing bittern scaling is specifically: 20 parts of tetrasodium 2-phosphonic acid butane-1,2,4-trihydroxy acid, 5 parts of sodium polyacrylate, coconut 2 parts of oleic acid diethanolamide, 0.5 parts of polyether modified silicon, 72.5 parts of distilled water. During application, prepare 5 kg of the modifier for preventing brine scaling according to the composition mass formula, mix the modifier for preventing brine scaling into the brine workover fluid according to the ratio of 1%, and use the cement truck with...

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PUM

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Abstract

The invention discloses a modifier for preventing bittern scaling. The modifier comprises the following ingredients (by weight): 10-20 parts of 2-phosphonobutane-1,2,4-tetrasodium trihydroxy, 5-10 parts of sodium polyacrylate, 2-3 parts of coco fatty acid diethanol amide, 0.2-0.5 part of polyether modified silicone and the rest of water. The modifier has a good effect of preventing scaling and has strong flowback performance. By the use of the modifier, construction is simple, and workload is not increased, and cost is saved.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a modifier for preventing bittern scaling. Background technique [0002] In the process of oilfield development, workover operation is an important means to maintain the productivity of production wells and slow down the natural decline. Killing fluid is needed to balance formation pressure during its operation, and brine has a certain application proportion as killing fluid. [0003] The application of brine as a well killing fluid has certain advantages such as clay expansion inhibition and low price. However, it is reflected in its use that it is easy to cause formation scaling and often cause blockage; after entering the formation, it will emulsify with the formation fluid, and in the middle and low permeability layers, it will also form water lock damage, resulting in a decline in formation production; at the same time The higher salinity and the formation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 胡成亮陈建光王兴伟宋玉文韩项勇饶富培李倩杜会尧季庆荣
Owner PETROCHINA CO LTD
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