中文摘要：

和田河气田、玉北1井油藏的发现证实了和田古隆起作为塔里木盆地三大古隆起之一有着广阔的勘探前景,但研究程度较低。基于地震、钻井、岩心、薄片等资料综合分析,对麦盖提斜坡群古三维区奥陶系碳酸盐岩古地貌、古水系及岩溶储层发育规律进行了研究;结合古岩溶缝洞系统充填方解石碳氧同位素特征,对古岩溶储层发育及充填期次进行了分析。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^δ13C和^δ18 O的变化范围较大,^δ13 CPDB为-10.22‰～3.06‰,平均值为-0.89‰,^δ18 OPDB为-15.53‰～-6.21‰,平均值为-9.72‰;可划分为古风化壳裸露岩溶期、埋藏岩溶期和较晚岩溶作用期3期不同的古岩溶作用期次。

英文摘要：

The discovery of Hetian River gas field and well Yubei 1reservoir,one of the three largest ancient uplift in Tarim Basin,has confirmed that the Hetian paleo-uplift has wider exploration prospect.This paper studies the Ordovician carbonate ancient landscape and the ancient water system before Silurian on the basis of the comprehensive analysis of seismic,drilling,core and rock slice data,and the law of karst reservoir development of Qungu three dimensional area,Maigaiti slope as well.Also the paper analyses the paleokarst reservoir development phase and filling period combined with the calcite carbon and oxygen isotope characteristics of the filled paleokarst seam hole system.The results show that the later dissolution holes,karst caves and karst fissures are the main reservoir space.The calcite carbon and oxygen isotope filled in karst fissures and holes indicates that the value of ^δ13C and ^δ18 O range is larger.The ^δ13C value is-10.22‰-3.06 ‰,averaged at-0.89‰ and ^δ18 O value is-15.53‰--6.21‰,averaged at-9.72‰,reflecting the complexity of the ancient karstification and filling environment.The study shows the area can be divided into three different karstification and filling periods：the ancient weathering crust karst exposure period,the buried karst period and the late karstification.