深层稠油油藏微生物吞吐技术研究与应用  

Research and Application of the Technology for Microbial Huff and Puff in DeepHeavy Oil Reservoir

作　　者：杜勇[1] 段志刚[1] DU Yong;DUAN Zhigang(Shengli Oilfield Branch Company,Sinopec,Dongying,Shandong 257237,P R of China)

机构地区：[1]中国石化胜利油田分公司,山东东营257237

出　　处：《油田化学》2018年第3期499-502,共4页Oilfield Chemistry

基　　金：国家高技术研究发展计划(863)"微生物采油关键技术"(项目编号2013AA064401)

摘　　要：针对深层稠油油藏桩139块部分井注汽压力高、且二次DC冷采效果不好的低液低产现状,开展了微生物吞吐采油技术研究与应用。根据试验井所处的油藏特征和原油性质,优选了微生物复合吞吐体系主要成分,并按设计的注入段塞应用于桩西油田和太平油田。结果表明,采用激活剂II(0.4%糖蜜+0.2%玉米浆干粉+0.2%糊精+0.2%NaNO3+0.02%(NH4)2HPO4)、含地芽孢杆菌属的外源菌液和0.1%槐糖脂类生物表面活性剂配制的微生物复合吞吐体系,在pH值为5的条件下,乳化原油效果好,产气量较大。在矿场以6 m3/h注入主段塞200 m3的微生物复合吞吐体系后,原油黏度降幅50.1%,增油有效期166 d,累计增油915 t,投入产出比1∶9.07,经济效益明显提高。Aiming at the problem of low liquid and low yield in Zhuang 139 block wells in deep heavy oil reservoir,which did not get good results of the second cycle of DC as a result of high pressure of steam injection,the technology for microbial huff and puff in deep heavy oil reservoir was studied. According to the reservoir characteristics and crude oil properties of test well,the main components of microbial complex huff and puff system were optimized,which was applied to Zhuangxi oilfield and Taiping oilfield by designed injection slug. The results showed that by using microbial compound system that consisted of activator II（0.4%molasses＋0.2% corn pulp dry powder＋0.2% dextrin＋0.2% NaNO3＋0.02%（NH4）2 HPO4）,inoculating microbes containing bacillus polymyxa. and 0.1% surface active agent of Sophora japonica lipid biologic surfactant,the effect of emulsified crude oil was good and gas production was great under the pH value of 6. The viscosity of crude oil reduced by 50.1%,the oil increase period was 166 d,the cumulative oil increased 915 t,the input-output ratio was 1∶9.07,and the economic benefit was obviously improved after microbial compound system was injected in field with 6 m3/h injection speed and 200 m3 main slug.

关 键 词：稠油油藏 微生物 激活剂 外源菌 表面活性剂 

分 类 号：TE357.9[石油与天然气工程—油气田开发工程]