元坝地区雷口坡组顶部古岩溶测井相与储层特征分析  

THE ELECTROFACIES AND RESERVOIR CHARACTER ANALYSIS OF THE TOP OF LEIKOUPO FORMATION ANCIENT KARST IN YUANBA REGION

作　　者：仝燕[1] 傅恒[1,2] 葛海波[1] 孙先长[3] 阮何文[4] 

机构地区：[1]成都理工大学能源学院,成都610059 [2]成都理工大学油气藏地质及开发工程国家重点实验室,成都610059 [3]成都理工大学材料与化学化工学院,成都610059 [4]青海油田公司采油二厂开发室,海西州816400

出　　处：《物探化探计算技术》2011年第6期616-621,573,共6页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：以构造背景分析为基础,结合古岩溶在钻井和测井上的显示特征,利用常规测井与成像测井组合对比,对古岩溶发育段进行测井相分析,得出古岩溶在测井上的识别标志特征。综合分析认为,古岩溶有效储集空间是由受古岩溶作用产生的溶蚀孔洞和由构造作用产生的裂缝共同构成。通过古岩溶测井识别与古岩溶剖面结构划分与对比,综合钻井地质剖面认为,元坝地区古岩溶剖面在垂向上主要发育地表岩溶带与渗流岩溶带,风化壳时期溶蚀作用强烈,但大部份空间均被后期沉积物所充填,呈现"溶蚀强、充填强"的现象,储集空间类型以孔隙～裂缝型为主。Based on the structural analysis,combining with the ancient karst characteristics displayed in drilling and logging,comparison of conventional logging with FMI logging,the ancient karst section electrofacies are analyzed and the logging recognition feature of ancient karst are concluded.After the comprehensive analysis,it is suggested that the effective reservoir space is consisted of solution caves generated by the karstification and fractures generated by the tectonic movement.Through the ancient karst logging identification and ancient karst profile structure division and correlation combining with drilling geological sections,it is considered that surface karst zone and vadose karst zone are mainly developed in the vertical section of YuanBa region.Karstification was strong during weathering crust period;but most of the space was filled by sediments later,and the karstification shows ' strongly karsting and strongly filling',and the reservoir space is mainly pore-fracture type.

关 键 词：雷口坡 古岩溶 测井 储层 分析 

分 类 号：TE122.21[石油与天然气工程—油气勘探]