中文摘要：

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^13C和δ^18O值变化范围较大,δ^13CPDB值为-4.17‰-1.59‰,平均值为-1.05‰;δ^18OPDB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。

英文摘要：

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.