苏北盆地复杂断块油藏多夹层模式划分及控油规律  

Classification of Multi-interlayers Pattern and Effects on Residual Oil Distribution in Complex Fault-block Reservoir in Subei Basin

作　　者：王智林 刘炳官[1] 尤启东[2] 孔维军[3] 张建宁[3] WANG Zhi-lin;LIU Bing-guan;YOU Qi-dong;KONG Wei-jun;ZHANG Jian-ning(Research Institute of Exploration and Development,Jiangsu Oilfield Company,Yangzhou 225009,China;Management Department of Exploration and Development,Jiangsu Oilfield Company,Yangzhou 225009,China;No.1 Oil Production Plant,Jiangsu Oilfield Company,SINOPEC,Jiangdu 225265,China)

机构地区：[1]中国石化江苏油田分公司勘探开发研究院,扬州225009 [2]中国石化江苏油田分公司勘探开发管理部,扬州225009 [3]中国石化江苏油田分公司采油一厂,江都225265

出　　处：《科学技术与工程》2020年第19期7671-7676,共6页Science Technology and Engineering

基　　金：中国石化集团公司科技攻关项目(P16050);江苏省博士后基金A类资助(1801015A)。

摘　　要：复杂断块油藏含油层系薄,隔夹层发育复杂,因此多夹层控制下的剩余油分布规律对其水驱技术政策的制定意义重大。首先基于典型模型研究了夹层数目(贯通注采井)、夹层发育规模及夹层展布位置对于水驱后储层纵向波及效率及剩余油分布模式的影响。然后依据复杂断块油藏储层特征建立了16种表征注采井间不同夹层数量及展布位置的多夹层驱替模型,并将其归纳为"多驱少"和"少驱多"两种驱替模式。总结了两种驱替模式下夹层对于剩余油分布的控制作用及其差异性。基于多夹层驱替模式划分方法及控油规律,针对典型区块提出补层及新井部署等挖潜对策,取得良好应用效果。研究成果及应用实践可为其他多夹层油藏中高含水期的剩余油挖潜提供借鉴意义。Complex fault-block reservoirs have thin oil-bearing series and complex isolated interlayers. Therefore, the distribution of residual oil under the control of multiple interlayers is significant for the choice of potential exploitation measures in complex fault-block reservoirs by water flooding. Based on the typical model, the effects of the number(when the interlayer is across injection and production wells), size, and location of interlayers on the vertical sweep efficiency and residual oil distribution after water flooding were studied. Then, 16 kinds of multi-interlayer displacement models simulating interlayers of different number and position between injection and production wells were established, consistent with the characteristics of complex fault block reservoirs. Finally, the inter-well multi-interlayer displacement models were classified into two displacement modes of less to more mode and more to less mode. The controlling effect of interlayer on residual oil distribution under two displacement modes and their differences were summarized. Based on the classification method of multi-interlayer displacement mode and its control of residual oil, potential exploration countermeasures such as perforation adding and new well deployment for typical blocks were conducted and higher recovery performance was obtained. The results and its success application provide reference for other multi-layered reservoirs in high water-cut period of residual oil exploration.

关 键 词：多夹层储层 井间夹层驱替模式 剩余油分布 波及效率 挖潜对策 

分 类 号：TE345[石油与天然气工程—油气田开发工程]