塔北哈拉哈塘地区奥陶系碳酸盐岩古地貌及岩溶储层发育特征  

Paleogeomorphology and Karst Reservoir Development of Ordovician Carbonate in Halahatang Area,Northern Tarim Basin

作　　者：张庆玉[1,2] 秦凤蕊[2] 梁彬[2] 淡永[2] 李景瑞[2] 陈利新[3] 

机构地区：[1]中国地质大学(武汉)环境学院,武汉430074 [2]中国地质科学院岩溶地质研究所/国土资源部广西岩溶动力学重点实验室,广西桂林541004 [3]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《地质科技情报》2017年第1期168-175,共8页Geological Science and Technology Information

基　　金：国家自然科学基金项目(41302122);国家重点基础研究973计划项目(2011CB201001);国土资源部公益性行业科研专项(201211082)

摘　　要：为了研究哈拉哈塘地区奥陶系碳酸盐岩岩溶古地貌及岩溶储层发育规律,基于地震、钻井、岩心、薄片分析,采用"残厚与地层古构造趋势面结合"方法对古地貌、古水系进行恢复刻画,划分为3种二级地貌类型,6种三级地貌类型和若干微地貌形态。在岩石化学特征及储层物性研究基础上结合古岩溶缝洞充填方解石碳氧同位素特征,对古岩溶发育及充填期次进行分析。结果表明:后期溶蚀孔、溶洞和溶蚀裂缝是该区主要储集空间;充填方解石δ^(13)C和δ^(18)O值变化范围较大,δ^(13)CPDB值为-4.17‰~1.59‰,平均值为-1.05‰;δ^(18)O_(PDB)值为-15.71‰^-5.17‰,平均值为-11.15‰。并划分为海相沉积充填环境、大气淡水充填环境、浅埋藏沉积充填环境和深部埋藏高温环境4种不同的古岩溶作用期次。In order to research the Ordovician carbonate paleogeomorphology and the development of the karst reservoir,this study is conducted based on the seismic,drilling,core and the thin section analysis,and also uses＂the residual thickness and the formation of ancient structure trend surface＂method to restore the ancient landscape and ancient water system.The paper has divided the study area into three kinds of secondary geomorphic types and 6kinds of triple geomorphic types and number of micro morphology.Based on the carbon and oxygen isotope characteristics of ancient karst seam hole filling calcite,and the carbonate chemical characteristics and reservoir properties,the study analyzes the ancient karst development and filling period of time.The results show that the later dissolution pore,cave and karst fissures are the main reservoir space.The value of δ^13C and δ^18O is large,withδ13C ranging from-4.17‰to 1.59‰,averaged at-1.05 ‰,and δ^18O ranging from-15.71‰to-5.17‰,averaged at-11.15‰.Then,four different stages of ancient karstification are divided：marine sedimentary environment,atmospheric fresh water environment,shallow buried and buried depth of high temperature environment.

关 键 词：岩溶储层 古地貌 碳氧同位素 碳酸盐岩 塔里木盆地 

分 类 号：TE122.221[石油与天然气工程—油气勘探]