自生酸前置压裂液在碳酸盐岩储层中的室内实验评价  

Indoor Experimental Evaluation of Autogenic Acid Fracturing Fluid in Carbonate Reservoir

作　　者：刘威 章江 张超平 伍林 张浩[2] 李沁[2] LIU Wei;ZHANG Jiang;ZHANG Chao-ping;WU Lin;ZHANG Hao;LI Qin(Chuanzhong Oil and Gas Mine,Southwest Oil and Gas Field Branch of Petro China,Suining 629018,China;College of Energy,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]西南油气田分公司川中油气矿,遂宁629018 [2]成都理工大学能源学院,成都610059

出　　处：《科学技术与工程》2020年第3期1051-1056,共6页Science Technology and Engineering

基　　金：中国石油天然气股份有限公司科技项目(ASH097)。

摘　　要：碳酸盐岩储层在酸化压裂过程中存在酸岩反应速率过快,裂缝远端酸蚀导流能力低等问题。针对此类问题,根据自生酸的特性设计一系列室内评价实验,对自生酸前置压裂液的性能进行评价。结果表明:自生酸前置压裂液体系在碳酸盐岩储层中具有独特的优势,能够在裂缝深处进行酸蚀,对深层储层具有良好的改造效果,提高裂缝远端的酸蚀导流能力。并且自生酸压裂液对储层的伤害率为21.79%,能够进行低伤害酸化改造。In the acidizing fracturing of carbonate reservoir,there exits some problems such as too fast acid-rock reaction rates and low flow conductivity in the far end of the acid-corroded fractures.In order to solve these problems,a series of laboratory experiments were designed according to the characteristics of authigenic acid to evaluate the performance of authigenic acid fracturing fluid.Experimental results showed that the authigenic acid fracturing fluid system had unique advantages in the carbonate reservoir,for example,it can acidize and corrode the rock in the depth end of the fractures,which remarkably increased the flow conductivity in the far end of the fractures and enhanced the effects of acid fracturing.Moreover,the authigenic acid fracturing had a low damage rate of 21.79%and presented great potentials in the acid fracturing of carbonate reservoir.

关 键 词：碳酸盐岩 自生酸 前置压裂液 酸蚀 实验评价 

分 类 号：TE377[石油与天然气工程—油气田开发工程]