“堵水+调剖”工艺参数优化和油藏适应性评价——以渤海SZ36-1油田为例  

Optimization of technological parameters and evaluation of reservoir adaptation by water plugging and profile control:a case from Bohai SZ36-1 oilfield

作　　者：张保康[1] 徐国瑞[1] 铁磊磊[1] 苏鑫[2] 卢祥国[2] 闫冬[2] ZHANG Baokang;XU Guorui;TIE Leilei;SU Xin;LU Xiangguo;YAN Dong(China Oilfield Services Limited of Tianjin Branch,Tianjin 300452,China;Key Laboratory of Enhanced Oil Recovery of Education Ministry,Northeast Petroleum University,Daqing 163318,Heilongjiang China)

机构地区：[1]中海油田服务股份有限公司,天津300452 [2]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《岩性油气藏》2017年第5期155-161,共7页Lithologic Reservoirs

基　　金：国家自然科学基金项目"抗盐型聚合物油藏适应性及其改进方法基础研究"(编号:51574086);"十三五"国家重大科技专项"渤海双高油田多级窜逸堵调驱一体化技术研究及示范"(编号:2016ZX05058-003-010)联合资助

摘　　要：渤海SZ36-1油田具有原油黏度较高、单井注水量较大和储层胶结疏松、非均质性强、渗透率较高等特点,注水开发引起高渗透层岩石结构破坏、突进现象严重,亟待采取液流转向措施。以注入压力、含水率和采收率为评价指标,开展了"堵水+调剖"联合作业增油降水效果及其影响因素的实验研究。结果表明:堵水剂优化组成为"4%淀粉+4%丙烯酰胺+0.036%交联剂+0.012%引发剂+0.002%无水亚硫酸钠",堵水剂段塞优化组合为"0.05 PV前置段塞(淀粉4%)+0.025~0.075 PV堵水剂+保护段塞0.025 PV(淀粉4%)+顶替段塞0.05~0.10 PV(聚合物溶液,C_P=1 500 mg/L)",调剖剂溶液的组成和段塞组合为"0.05~0.10 PV调剖剂(Cr^(3+)聚合物凝胶,C_P=3 500 mg/L)"。随着储层非均质性和原油黏度的增大,采收率增幅增加,这表明"调剖+堵水"联合作业措施具有较强的油藏适应性。SZ36-1oilfield in Bohai has the characteristics of high crude oil viscosity,single well water injection quantity,and the reservoir is characterized by loose cementation,strong heterogeneity and high permeability.The water injection development resulted in breakthrough phenomenon and damaged reservoir structure,which urgently needs to be taken fluid diversion measures.Taking injection pressure,water cut and oil recovery as evaluation indexes,the effect of water shutoff and profile control joint operation on increasing oil and decreasing water and its influencing factors were studied by experiment.The results show that water shutoff agent optimization composition of4%+4%starch acrylamide+0.036%crosslinking agent+0.012%initiator+0.002%anhydrous sodium sulfite,plugging agent slug optimization combination0.05PV segment prefix plug(4%starch)+0.025PV to0.075PV plugging agent and protective slug0.025PV(4%starch)+replace segment plug0.05PV(polymer solution,CP=1500mg/L),optimization of profile control agent composition and slug combination0.05PV to0.10PV profile control agent(Cr3+polymer gel,CP=3500mg/L).With the increase of reservoir heterogeneityand oil viscosity,the growth rate of oil recovery increases.The joint operation of profile control and water plugging has strong reservoir adaptability.

关 键 词：堵水调剖 参数优化 油藏适应性 物理模拟 渤海SZ36-1油田 

分 类 号：TE357[石油与天然气工程—油气田开发工程]