摘要
利用岩心、测井、分析化验、吸水剖面、生产动态等资料,结合地质与油藏工程识别方法,分析非洲内陆裂谷M盆地P油田主力产油层Y油组的优势渗流通道,明确层状砂岩油藏在天然水体与人工注水协同开发时优势渗流通道分布规律与分布模式。结果表明:M盆地P油田Y油组优势渗流通道优先发育于以辫状河沉积相为主的YⅥ砂组正韵律砂体底部,厚层致密泥岩隔夹层促进优势渗流通道发育并限制纵向延展。优势渗流通道多与物源呈顺河道方向平行或小角度相交;发育于层间渗透率突进系数高(>1.25)、层间渗透率变异系数较高(>0.4)、层间渗透率级差大(>4.36)砂组的高渗砂岩层。研究区建立3个层次优势渗流通道分布模式,即砂组间水体控制、砂组隔层控制和砂岩层内韵律性控制分布模式。该结果为治理层状砂岩油藏优势渗流通道、提高油藏剩余油采收率、实现稳油控水提供地质参考。
Based on the data of core,well logging,laboratory analysis,water injection profile and production performance,combined with geological and reservoir engineering identification methods,the dominant seepage channels of Y Oil Group,the main oil layer of P Oilfield in M Basin of African inland rift basin,were identified and quantitatively evaluated,and the distribution law and distribution mode of dominant seepage channels in the coordinated development of layered sandstone reservoirs in this area were clarified.The results show that the dominant seepage channel is preferentially developed at the bottom of the positive rhythm sand body in the Y Ⅵ sand group dominated by braided river sedimentary facies.The thick dense mudstone interlayer will promote the development of the dominant seepage channel and limit its longitudinal extension.The dominant seepage channels are mostly parallel to the source and along the river direction or intersect at a small angle;it is developed in the high permeability sandstone layer of the sand group with high interlayer permeability breakthrough coefficient(>1.25),high interlayer permeability coefficient of variation(>0.40) and large interlayer permeability difference(>4.36).The dominant seepage channels in the synergistic development of layered sandstone reservoirs can be divided into three distribution modes:water control between sand groups,interlayer control within sand groups,and rhythmic control within sandstone layers.The results provide a geological reference for controlling the dominant seepage channel of layered sandstone reservoir,improving the recovery of remaining oil and realizing stable oil and water control.
作者
王浩南
吕文雅
冯敏
廖新维
曾联波
吴佳琦
张可
WANG Haonan;LYU Wenya;FENG Min;LIAO Xinwei;ZENG LianBo;WU Jiaqi;ZHANG Ke(State Key Laboratory of Oil and Gas Resources and Exploration,China University of Petroleum(Beijing),Beijing 102249,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;Chengdu Exploration and Development Research Institute,PetroChina Daqing Oilfield Company Limited,Chengdu,Sichuan 610041,China;PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China;Zhenhua Petroleum Holdings Company Limited,Beijing 100032,China)
出处
《东北石油大学学报》
CAS
北大核心
2022年第6期75-87,I0006,共14页
Journal of Northeast Petroleum University
基金
中国石油战略合作科技专项(ZLZX2020-02-02)
中国石油大学(北京)青年拔尖人才科研启动基金项目(2462017YJRC057)。
关键词
优势渗流通道
分布规律
分布模式
协同开发
提高采收率
层状砂岩油藏
dominant seepage channel
distribution law
distribution pattern
collaborative development
enhanced oil recovery
layered sandstone reservoir
