塔里木盆地塔中南坡奥陶系礁滩储层特征和控制因素  

Characteristics and controls of Ordovician reef flat reservoirs in the southern Tazhong slope of Tarim basin

作　　者：程翠[1] 何希鹏[1] 陆亚秋[1] 

机构地区：[1]中国石化江汉油田分公司勘探开发研究院,湖北潜江433124

出　　处：《石油地质与工程》2009年第5期21-24,共4页Petroleum Geology and Engineering

基　　金：中国石化江汉油田分公司"塔中江汉探区奥陶系油气成藏条件及勘探目标优选"项目资助

摘　　要：基于塔中南坡中2井钻探资料,对奥陶系碳酸盐岩储层特征进行了系统研究,明确了储层发育特征和控制因素。中、下奥陶统以台地相碳酸盐岩沉积为主;上奥陶统良里塔格组为台缘礁滩相沉积。储集空间以裂缝和溶蚀孔、洞为主,储层物性受沉积、成岩和构造作用控制,生物礁相储层物性明显优于滩相储层。奥陶系碳酸盐岩经历了两期溶蚀作用,对储层物性具有较好的改善作用,多期构造作用致使良里塔格组裂缝型储层发育。Based on a systematic study of the Ordovician carbonate reservoirs using drilling data of Well Zhong 2 in the Southern Tazhong Slope, characteristics and controls of the reservoirs are understood. The Middle and Lower Ordovician sections are composed of carbonate deposits of platform facies; and Upper Ordovician Lianglitage Formation, platform-edge reef flat facies. The reservoir spaces are dominated by fractures as well as dissolution pores and vugs. The petrophysic properties of the reservoirs are controlled with deposition,diagenisis and tectonism. The biohermal reservoirs have petrophysic properties much better than reef flat ones. The Ordovician carbonates have been subjected to two periods of dissolution, improving the petrophysic properties of the reservoirs. Episodes of tectonic events resulted in well-devel-oped fracture-type reservoirs of the Lianglige Formation.

关 键 词：礁滩相 储层 奥陶系 塔中隆起 塔里木盆地 

分 类 号：TE112.23[石油与天然气工程—油气勘探]