摘要
南堡凹陷X油田东一段发育浅水辫状河三角洲前缘沉积,储层砂体空间展布认识程度较低。综合应用岩心观察、测井解释及分析化验等资料,结合研究区沉积背景及地理环境,建立研究区浅水辫状河三角洲前缘储层砂体层次划分体系及空间结构模式。研究表明:①研究区单一砂体界面识别标志,纵向上主要依据泥质夹层、钙质夹层和含砾砂岩层,侧向上通过砂体顶面高程差异、厚度差异及曲线形态差异等;②根据砂体接触关系,总结出侧向叠置式、垂向叠置式、分离式及水平搭接式4种砂体空间结构类型;③对砂体半定量统计分析发现,研究区砂体类型以水下分流河道为主,平面上多呈交织条带状,局部呈斑块状,砂体组合样式以侧向叠置为主,占比63.6%。根据研究成果开展优化注水、产液结构调整,有效指导开发生产。
Shallow braided river delta front deposition is developed in the first member of Dongyi formation of X oilfield in Nanpu sag,and the spatial distribution of reservoir sand bodies is poorly understood.Based on core observation,logging interpretation and laboratory analysis,combined with the sedimentary background and geographical environment of the study area,the hierarchical division system and spatial structure model of reservoir sand bodies were established.The results show that:①as for the identification mark of single sand body interface,it is mainly based on argillaceous intercalation,calcareous intercalation and gravel bearing sandstone layer in vertical direction,and laterally,it passes through the sand body top surface elevation difference,thickness difference and curve shape difference,etc.②According to the contact relation of sand bodies,four spatial structure types are summarized,namely,lateral overlap,vertical overlap,separated and horizontal overlap;③The semi-quantitative statistical analysis of sand bodies shows that they are mainly distributed by underwater distributary channel,and most are interwoven strip in plane,and parts are patchy.The combination style is mainly lateral superposition accounting for 63.6%.Therefore,the water injection and liquid production structure adjustment have been carried out,which could provide guidance for production.
作者
冯晗
薛成
段健
张旭光
李晓革
曲丽丽
FENG Han;XUE Cheng;DUAN Jian;ZHANG Xuguang;LI Xiaoge;QU Lili(Exploration&Development Department of Jidong Oilfield Company,PetroChina,Tangshan,Hebei 063000,China;Nanpu Operating Block of Jidong Oilfield Company,PetroChina,Tangshan,Hebei 063200,China)
出处
《石油地质与工程》
CAS
2023年第1期10-15,共6页
Petroleum Geology and Engineering
基金
国家油气重大专项“高含水油田提高采收率新技术”(2016ZX05010)。
关键词
水下分流河道
单砂体
接触关系
储层结构
underwater distributary channel
single sand body
contact relationship
reservoir structure
