三水盆地布心组灰泥灰岩储层特征  

Characteristics of plaster limestone reservoir in Buxin formation of Sanshui basin

作　　者：唐鑫萍[1] TANG Xinping(Exploration&Development Research Institute of Dagang Oilfield Company,PetroChina,Tianjin 300280,China)

机构地区：[1]中国石油大港油田公司勘探开发研究院,天津300280

出　　处：《石油地质与工程》2021年第5期1-6,12,共7页Petroleum Geology and Engineering

基　　金：国家重大科技专项大型油气田及煤层气开发子课题(2016ZX05026003);中国石油天然气集团科技专项“成熟探区精细勘探关键技术”(2019D–0707)联合资助。

摘　　要：为了研究三水盆地古近系布心组灰泥灰岩储层的特征,综合分析了测录井、岩心、薄片、扫描电镜、孔渗分析和微米CT测试等资料。结果表明:灰泥灰岩可分为生物灰泥灰岩、砂屑灰泥灰岩、块状灰泥灰岩三种类型;渗透率一般小于1×10^(-3)μm^(2)、属致密储层,内部发育以裂缝、微米级基质孔隙、少数溶蚀孔组成的微观储集空间;灰岩与富有机质暗色泥岩形成间互沉积,形成互层型源储匹配关系;油气显示为荧光-油斑,显示级别主要由储集空间发育程度决定,具有“物性决定含油气性”的特征;其中生物灰泥灰岩、砂屑灰泥灰岩厚度大、连续性好、物性好、油气显示级别高,为潜在的有利储层。In order to study the characteristics of limestone reservoir of Paleogene Buxin formation in Sanshui basin,the data of logging,core,thin section,scanning electron microscope,porosity and permeability analysis and micro CT testing were comprehensively analyzed.The results show that the plaster limestone can be divided into three types:biological plaster limestone,sandy plaster limestone and massive plaster limestone.The permeability is generally less than 1×10^(-3)μm^(2),and the micro reservoir space is composed of fractures,micro matrix pores and a few dissolution pores.The limestone and organic rich dark mudstone are interbedded,forming the source reservoir matching relationship of interbedded type.The oil and gas display is fluorescence oil spot,and the display level is mainly determined by the development degree of reservoir space,with the feature of"oil and gas bearing property is determined by physical properties".Among them,biological plaster limestone and sandy plaster limestone are the potential favorable reservoirs with large thickness,good continuity,good physical properties and high oil and gas display level.

关 键 词：三水盆地 古近系 灰泥灰岩 物性特征 源储配置关系 

分 类 号：TE112.23[石油与天然气工程—油气勘探]