渤海湾盆地廊固凹陷古近系沙河街组油藏单元精细表征  

Fine characterization of reservoir units of Paleogene Shahejie Formation in Langgu Sag,Bohai Bay Basin

作　　者：胡望水[1,2] 高飞跃 李明[3] 郭志杰 王世超 李相明[1,2] 李圣明 揭琼 HU Wangshui;GAO Feiyue;LI Ming;GUO Zhijie;WANG Shichao;LI Xiangming;LI Shengming;JIE Qiong(College of Earth Sciences,Yangtze University,Wuhan 430100,China;Key Laboratory of Exploration Technologies for Oil and Gas Resources,Ministry of Education,Yangtze University,Wuhan 430100,China;Jianghan Oil Production Plant,Sinopec Jianghan Oilfield Company,Qianjiang 433128,Hubei,China;Department of Development,PetroChina Huabei Oilfield Company,Renqiu 062552,Hebei,China;Research Institute of Exploration and Development,PetroChina Huabei Oilfield Company,Renqiu 062552,Hebei,China;No.4 Oil Production Plant,PetroChina Huabei Oilfield Company,Langfang 065000,Hebei,China)

机构地区：[1]长江大学地球科学学院,武汉430100 [2]长江大学油气资源与勘探技术教育部重点实验室,武汉430100 [3]中国石化江汉油田分公司江汉采油厂,湖北潜江433128 [4]中国石油华北油田公司开发部,河北任丘062552 [5]中国石油华北油田公司勘探开发研究院,河北任丘062552 [6]中国石油华北油田公司第四采油厂,河北廊坊065000

出　　处：《岩性油气藏》2023年第5期92-99,共8页Lithologic Reservoirs

基　　金：国家科技重大专项“渤海湾盆地精细勘探评价关键技术”(编号:2016ZX05006-002)资助。

摘　　要：依据岩心相、测井相、岩屑分析化验等资料,利用点-线-面的油藏单元表征方法,对渤海湾盆地廊固凹陷古近系沙河街组的微构造、主力层油藏单元类型及油水连通关系进行了详细研究。研究结果表明:(1)廊固凹陷古近系沙河街组主要发育构造型油藏单元和“断砂配置”型油藏单元。安11井区Es_(4)^(上)-Ⅰ砂组1小层、2小层、3小层和4小层的油藏单元数量分别为6个、5个,3个和2个;安22井区Es3中-Ⅱ砂组3小层和7小层的油藏单元均为5个,其他小层油藏单元数量不等。(2)安11井区Es_(4)^(上)-Ⅰ砂组油藏单元砂体连通程度和流体连通程度均较高;安22井区Es_(3)^(中)油藏单元类型、空间分布特征均较为复杂,油藏单元砂体连通程度较高、流体连通程度相对较低。(3)在实施油藏单元作为开发单元后,安11井区和安22井区各小层的单井日产原油量均有增加。通过油藏单元的精细表征,不仅能发现勘探开发中的滚动评价目标,而且可为开发过程中动态储量及经济可采储量的标定提供准确的油层厚度、油藏边界及油藏分布范围等。Based on data of core facies,logging facies and rock fragment analysis,the microstructure,reservoir unit types and oil-water connectivity of Paleogene Shahejie Formation in Langgu Sag of Bohai Bay Basin were studied using a point-line-surface representation method.The results show that:(1)The Paleogene Shahejie Formation in Langgu Sag mainly has two types of reservoir units,namley,structural reservoir units and“fault sand configuration”reservoir units.There are six,five,three and two reservoir units in No.1 to No.4 sublayers of Es_(4)-Ⅰ sand group in An 11 well area,respectively.There are five reservoir units in both No.3 and No.7 sublayers of Es_(3)-Ⅱ sand group in An 22 well area,while the number of reservoir units in other sublayers varies.(2)The reservoir units of the upper Es_(4)-Ⅰ sand group in An 11 well area have high connectivity of sand bodies and fluids,while the reservoir units of middle Es3in An 22 well area have complex types,complex distribution,high sand body connectivity and relatively low fluid connectivity.(3)After implementing the reservoir units as development units,the daily crude oil production of each sublayer in An 11 and An 22 well area has increased.Fine characterization of reservoir units is favorable for indentifing the rolling evaluation objectives in exploration and development,and it also can determine accurate reservoir thickness,reservoir boundaries and reservoir distribution range for the calibration of dynamic reserves and economically recoverable reserves during the development process.

关 键 词：微构造 沉积微相 砂体连通程度 构造型油藏单元 “断砂配置”型油藏单元 沙河街组 古近系 廊固凹陷 渤海湾盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]