杜84块蒸汽辅助重力泄油井低物性段酸液体系优选及酸化增渗实验研究  

Optimization of Acid System in Low Property Section of Well Steam Assisted Gravity Drainage in Block Du 84 and Experimental Study on Acidizing and Seepage Enhancement

作　　者：曹广胜[1] 刘艺佳 白玉杰[1] 潘锦 李世宁 CAO Guang-sheng;LIU Yi-jia;BAI Yu-jie;PAN Jin;LI Shi-ning(The Key Laboratory for Improving Oil and Gas Recovery in the Ministry of Education,Daqing 163318,China;Liaohe Oilfield Limited Liability Company Special Oil and Gas Field Development Company,Panjin 124000,China)

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,大庆163318 [2]辽河油田有限责任公司特殊油气田开发公司,盘锦124000

出　　处：《科学技术与工程》2020年第10期3927-3932,共6页Science Technology and Engineering

基　　金：国家重大专项(2016ZX05012002-006)。

摘　　要：为解决低物性段影响蒸汽辅助重力驱油开采超稠油的问题,通过对杜84区块基本情况进行分析,判断研究区具有潜在的酸敏特征,若采用酸化的增产方式时应注意主体酸液的选取。通过溶蚀实验优选酸化液体系配方为4%盐酸+5%氟硼酸+2%硝酸+2%多聚磷酸+2%乙醇+1%黏土稳定剂+1.5%兰826缓蚀剂+1%钙离子稳定剂(三聚磷酸钠:氨基三亚甲基膦酸=1:3)+1.5%乙二醇丁醚,最佳反应时间为24 h。利用所选酸液配方开展酸化增渗实验,实验结果表明:所选酸液体系增渗范围为72.84%~95.16%,充分验证了酸化液配方对于天然岩心有很好的酸化、增渗效果,满足施工要求。To solve the problem that the low-physical-property section affects the production of super-heavy oil by steam-assisted gravity displacement,the basic situation of the Du 84 block was analyzed.Results show that the research area as potentially acid-sensitive.If the acidizing method was used to increase the yield,attention should be paid to the selection of the main acid solution.The formula of acidizing solution system was determined in the dissolution experiment as:4%HCl+5%HBF4+2%HNO3+2%H6P4O13+2%C2H5OH+1%clay stabilizer+1.5%Lan826 corrosion inhibitor+1%calcium ion inhibitor(Na5P3O10;ATMP=1;3)+1.5%2-butoxy ethanol.The optimum reaction time was 24 h.The experiment of acidizing and seepage was carried out by using the selected acid formula.Results show that the range of increased permeability of the selected acid system was 72.84%~95.16%.It was fully verified that the acidizing liquid formula had a good acidizing effect on the natural core and could meet the construction requirements.

关 键 词：蒸汽辅助重力驱 酸化 低物性 采收率提高 

分 类 号：TE135[石油与天然气工程—油气勘探]