低渗透油田油井复合解堵增产液体系的构建与应用  

Construction and Application of Compound System of Plugging Removal and Stimulating Fluid for Low Permeability Oilfield

作　　者：赵晨 ZHAO Chen(CNOOC EnerTech-Drilling and Production Company,Shanghai 200000,China)

机构地区：[1]中海油能源发展股份有限公司,上海200000

出　　处：《化学与生物工程》2022年第2期55-58,共4页Chemistry & Bioengineering

基　　金：国家重大科技专项(2016ZX05028-001)。

摘　　要：针对低渗透油田油井储层污染导致的产能下降问题,室内构建了一套适合低渗透油田油井的复合解堵增产液体系,并对其综合性能进行了评价。室内实验表明,该体系对无机堵塞物和有机堵塞物均具有良好的溶解能力,能够有效解除低渗透油田油井储层污染;该体系具有良好的防膨性能,对目标油田储层段岩屑的防膨率可以达到98%以上;该体系具有良好的缓蚀性能,对N80标准钢片的平均腐蚀速率仅为2.74 g·m^(-2)·h^(-1),低于行业标准;该体系对现场钻井液、完井液和修井液依次污染后的天然岩心具有良好的综合解堵性能。现场应用表明,A井采用该体系施工后,含水率明显下降,日产油量显著提升,达到了良好的解堵增产效果。In terms of the problem that reservoir pollution may lower the productivity in low permeability oilfield,we developed a compound system of plugging removal and stimulating fluid suitable for low permeability oilfield,and evaluated its comprehensive performance.The results of laboratory experiments show that the system has good dissolving capacity on inorganic and organic plugging,and can effectively remove the reservoir pollution in low permeability oilfield;the anti-swelling rate of cuttings in the reservoir section of the target oilfield can reach more than 98%,indicating that the system has good anti-swelling performance;the average corrosion rate of N80 standard steel sheet is only 2.74 g·m^(-2)·h^(-1),which is lower than that of the industrial standard,indicating that the system has good corrosion inhibition performance.In addition,the system has good comprehensive plugging removal performance for the natural core contaminated by drilling fluid,completion fluid,and workover fluid successively.The results of field application show that,after the system has been applied in Well A,the water content decreases obviously,the daily oil production increases significantly,and the good effectiveness in plugging removal and stimulation can be achieved.

关 键 词：低渗透油田 储层污染 解堵增产 

分 类 号：TE39[石油与天然气工程—油气田开发工程] TE358