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Oil and gas source and accumulation of Zhongqiu 1 trap in Qiulitage structural belt, Tarim Basin, NW China
Petroleum Exploration and Development ( IF 7.5 ) Pub Date : 2020-06-18 , DOI: 10.1016/s1876-3804(20)60072-6
Jian LI , Jin LI , Zengye XIE , Chao WANG , Haizu ZHANG , Mancang LIU , Dejiang LI , Wei MA , Danfeng MAO , Xu ZENG

Abstract

Well Zhongqiu 1 obtained highly productive oil-gas stream in the footwall of Zhongqiu structure, marking the strategic breakthrough of Qiulitag structural belt in the Tarim Basin. However, the oil and gas sources in Zhongqiu structural belt and the reservoir formation process in Zhongqiu 1 trap remain unclear, so study on these issues may provide important basis for the next step of oil and gas exploration and deployment in Qiulitage structural belt. In this study, a systematic correlation of oil and gas source in Well Zhongqiu 1 has been carried out. The oil in Well Zhongqiu 1 is derived from Triassic lacustrine mudstone, while the gas is a typical coal-derived gas and mainly from Jurassic coal measures. The oil charging in Well Zhongqiu 1 mainly took place during the sedimentary period from Jidike Formation to Kangcun Formation in Neogene, and the oil was mainly contributed by Triassic source rock; large-scale natural gas charging occurred in the sedimentary period of Kuqa Formation in Neogene, and the coal-derived gas generated in the late Jurassic caused large-scale gas invasion to the early Triassic crude oil reservoirs. The Zhongqiu 1 trap was formed earlier than or at the same period as the hydrocarbon generation and expulsion period of Triassic-Jurassic source rocks. Active faults provided paths for hydrocarbon migration. The source rocks-faults-traps matched well in time and space. Traps in the footwall of the Zhongqiu structural fault have similar reservoir-forming conditions with the Zhongqiu 1 trap, so they are favorable targets in the next step of exploration.



中文翻译:

塔里木盆地秋里塔格构造带中丘1圈闭的油气源与成藏

摘要

中丘1井在中丘构造下盘获得了高产的油气流,标志着塔里木盆地秋利塔格构造带的战略性突破。然而,中丘构造带的油气来源和中丘一圈闭的成藏过程尚不清楚,因此对这些问题的研究可能为下一步丘里塔格构造带的油气勘探与开发提供重要依据。在这项研究中,已经对中丘1井的油气源进行了系统的对比。Zhongqiu 1井的油来自三叠纪湖相泥岩,而该气体是典型的煤成气,主要来自侏罗纪煤系。中丘1井的注油主要发生在新近纪的基迪克组至康村组的沉积时期,石油主要来自三叠纪烃源岩。在新近纪的库车组沉积期发生了大规模的天然气充注,侏罗纪晚期产生的煤成气导致大规模的天然气侵入三叠纪早期的油藏。中丘一圈闭的形成早于三叠纪—侏罗系烃源岩生烃和排烃期。活动断层为油气运移提供了路径。源岩断层陷阱在时间和空间上匹配良好。中丘构造断裂下盘下的圈闭与中丘1圈闭具有相似的成藏条件,因此是下一步勘探的有利目标。在新近纪的库车组沉积期发生了大规模的天然气充注,侏罗纪晚期产生的煤成气导致大规模的天然气侵入三叠纪早期的油藏。中丘一圈闭的形成早于三叠纪—侏罗系烃源岩生烃和排烃期。活动断层为油气运移提供了路径。源岩断层陷阱在时间和空间上匹配良好。中丘构造断裂下盘下的圈闭与中丘1圈闭具有相似的成藏条件,因此是下一步勘探的有利目标。在新近纪的库车组沉积期发生了大规模的天然气充注,侏罗纪晚期产生的煤成气导致大规模的天然气侵入三叠纪早期的油藏。中丘一圈闭的形成早于三叠纪—侏罗系烃源岩生烃和排烃期。活动断层为油气运移提供了路径。源岩断层陷阱在时间和空间上匹配良好。中丘构造断裂下盘下的圈闭与中丘1圈闭具有相似的成藏条件,因此是下一步勘探的有利目标。中丘一圈闭的形成早于三叠纪—侏罗系烃源岩生烃和排烃期。活动断层为油气运移提供了路径。源岩断层陷阱在时间和空间上匹配良好。中丘构造断裂下盘下的圈闭与中丘1圈闭具有相似的成藏条件,因此是下一步勘探的有利目标。中丘一圈闭的形成早于三叠纪—侏罗系烃源岩生烃和排烃期。活动断层为油气运移提供了路径。源岩断层陷阱在时间和空间上匹配良好。中丘构造断裂下盘下的圈闭与中丘1圈闭具有相似的成藏条件,因此是下一步勘探的有利目标。

更新日期:2020-06-18
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