分层调驱中管柱的剪切作用对可动凝胶性能的影响  

Effect of Shear Action on Movable Gel Flooding in Stratified Columns

作　　者：罗斯力 王航臣 王志强 王东升 董毅 王少波 高珊珊 

机构地区：[1]中国石油华北油田分公司第二采油厂,河北霸州065709 [2]长沙理工大学交通运输学院,湖南长沙410114 [3]中国石油华北油田分公司采油工程研究院,河北任丘062552

出　　处：《油田化学》2015年第3期345-349,共5页Oilfield Chemistry

基　　金：中国石油天然气股份有限公司重大科技专项“华北油田上产稳产800万吨关键技术研究与应用”(项目编号2014E-35-07)

摘　　要：针对华北油田留62断块储层埋藏深、温度高的特点,优选出了耐温性能较好的可动凝胶配方体系:1500mg/L聚丙烯酰胺+2000mg/L树脂交联剂+1000mg/L乌洛托品复合促交剂+50mg/L多苯多胺热稳定剂。结合分层调驱工艺。在实验室模拟实验了偏心配水器和堵塞器剪切对可动凝胶溶液交联性能的影响。结果表明,可动凝胶经过偏心配水器后,凝胶溶液黏度保持率为97.76%,交联后凝胶黏度保持率为98.64%,偏心配水器剪切对可动凝胶性能影响较小;堵塞器剪切对可动凝胶性能影响较大,堵塞器开启程度越小,可动凝胶通过时产生的节流压差越大,对可动凝胶的剪切越严重,甚至影响可动凝胶的交联。在利用分注管柱实施可动凝胶调驱时,建议捞出调驱目的层的堵塞器。在留62-72井进行现场试验,可动凝胶调驱后不影响分注的投捞调配,调驱效果较好。According to the characteristics that the reservoir bed of Liu 62 block in Huabei oilfield was deeply buried at high temperature,the formula of movable gel system with good temperature performance was optimized,which consisted of 1500 mg/L polyacrylamide,2000 mg/L resinous cross-linking agent,1000 mg/L hexamine cross-promoting agent and 50 mg/L thermal stabilizing agent.Combined with the hierarchical flooding process,the shear effect of eccentric water distributor and blanking plug on the crosslinking performance of movable gel solution was studied through model experiment in laboratory.The results showed that the viscosity-retention rate of gel solution was 97.76%after passing through the eccentric water distributor,and that was98.64%after cross-linking.The eccentric water distributor shear had little effect on the properties of movable gel.But the blanking plug shear had great influence on the performance of movable gel.The smaller opening degree of plug device,the bigger throttle pressure difference was while the movable gel passed,the more serious shear on the movable gel was,which even affected the crosslinking of movable gel.Therefore,in the use of tubing string of movable gel flooding,it was suggested to fish up the blanking plugs in control-drive objective layers.The field trials in Liu 62-72 wells revealed that the movable gel after control-driving had no influence on the tripping and allocation in separate injection and the control-driving effect was preferable.

关 键 词：高温 可动凝胶 分注管柱 剪切 华北油田 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] O648.17[理学—物理化学]