【摘要】 塔北隆起沙西凸起勘探程度很低,英买油气田的发现是沙西凸起油气勘探的新突破。通过对沙西凸起东北部周缘5口井原油样品进行油-油对比分析,认为沙西凸起东北部斜坡带油气来自北侧库车坳陷烃源岩。综合三维地震、岩心观察、铸体薄片分析、测井曲线特征、EPT高频吸收衰减油气检测等研究,指出沙西突起东北部斜坡带寒武系、震旦系潜山圈闭位于油气运移的通道,即前中生界不整合面(T50)上,古潜山型油气藏成藏条件优越,并具有"一储两封"的成藏模式。更多还原

【Abstract】 Exploration degree is very low in Shaxi uplift of North Tarim swell. The discovery of Yingmai oil and gas field is a new breakthrough of exploration in Shaxi uplift. Oil-oil correlation of crude oil samples from 5 wells in northeast Shaxi uplift indicates that the hydrocarbon in the northeast slope belt of Shaxi uplift is derived from the source rock in north Kuche sag. Comprehensive study of 3D seism, core observation, cast thin-section analysis, well log features and EPT high-frequency absorption decay for hydrocarbon detection indicates that the Cambrian and Sinian buried hill traps in the northeast slope belt of Shaxi uplift lie on oil and gas migration path, i.e. pre-Miocene unconformity surface(T50), where has good conditions of forming buried hill traps, and shows the accumulation pattern of "one reservoir with two seals".更多还原