摘要
为了提高对马厂油田油藏连通性的认识,完善注采关系,选取M11-24典型注采井组进行油藏连通性的研究。在"油藏描述,动态验证"的思想指导下,利用测井等地质资料描述油藏的砂体连通性,在精细油藏描述研究成果基础上,分析产液量和吸水量等动态资料和示踪剂资料来动态拟合和验证井组内沙河街组三段下亚段1小层(下文简称EsL(1)3)各砂体的连通性。结果显示研究区EsL(1)3小层砂体可以分为3类:发育稳定的薄层砂体、复合厚砂体和与厚层砂体相邻的薄层砂体。不同类型的砂体对注入水的影响是不同的:发育稳定的薄层砂体内流体受沉积微相控制影响较大,不同微相砂体渗流差异大,但总体前缘水线推进速度较快;厚层复合砂体的夹层会对注入水起到缓冲作用,前缘水线推进速度较慢;而与厚砂体相邻的薄层砂体会受到厚砂体的层间干扰影响,前缘水线推进速度最慢。
In order to improve the understanding of reservoir connectivity in Machang Oilfield and perfect the relationship between water injection and liquid production,M11-24 typical injection-production well group was chosen for studying the reservoir connectivity,Guided by the concepts of'reservoir description and dynamic validation',the well logging data were used to describe the connectivity of reservoir sand bodies.And based on the research results of reservoir description,the dynamic data of water adsorpion and liquid production and the data of tracer were analyzed for dynamically matching and examining the connectivity of reservoir sand bodies in the EsL(1)3 of Shahejie Formation.Results indicate that the EsL(1)3of Shahejie Formation can be divided into three categories:stable thin layer sand bodies,composite thick sand bodies and the thin sandbodies adjacent to them.Different categories of sand bodies have different effects on injection water:sedimentary microfacies have strong control over the injection water in stable thin sand bodies.Different microfacies sand bodies have different permeabilities,but most of them have a high speed of leading edge of waterline.The inter-layers in composite sand bodies have buffering action for injection water.The composite sand bodies have a lower speed of leading edge of waterline than that of stable sand bodies.The thick sand bodies adjacent to the composite sand bodies have a lowest speed of leading edge of waterline,as the composite sand bodies have strong inter-layer interference on it.
出处
《长江大学学报（自科版）（中旬）》
CAS
2015年第3期70-73,77,共5页
Journal of Yangtze University(Nature Science Edition)
基金
国家油气重大专项(2011ZX05033-004)
关键词
油藏连通性
示踪剂
注采井组
马厂油田
reservoir connectivity
tracer
injection-production well group
Machang Oilfield
