Major breakthrough and exploration significance of Well Ketan 1 in Kuqa Depression, Tarim Basin

doi:10.3969/j.issn.1672-7703.2023.02.001

Abstract

Abstract: A major breakthrough has been obtained in the glutenite reservoir in the lower member of the Cretaceous Yagelem Formation in Well Ketan 1 located in Kela 2 trap of Kelasu Structural Belt in Tarim Basin, realizing the idea of “discovering another Kela gas field below Kela Gas Field”, which is of great significance to the exploration of the deep Cretaceous. The in-depth study of hydrocarbon accumulation conditions, reservoir physical properties and structural model in Well Ketan 1 is conducted, which supports to identify the hydrocarbon accumulation assemblage of “hydrocarbon supply by source rock in the Jurassic-Triassic, fractured type sandstone reservoir in Yagelem Formation,and mudstone cap rock in Shushanhe Formation” and establish a new hydrocarbon accumulation pattern of “lower generation and upper storage,vertical transport and stereoscopic accumulation” in Kelasu Structural Belt. The successful drilling of Well Ketan1 confirms that there is superior reservoir-cap rock assemblage below the Cretaceous Bashijiqik Formation in Kelasu Structural Belt, and the hydrocarbon accumulation conditions are more favorable when approaching to the deep source rock. In addition, the fault-anticline traps in Yagelem Formation are developed in rows and belts, which show great resource potential and can form a new strategic replacement area for gas exploration.

CLC Number:

TE112.1

Wang Qinghua, Yang Haijun, Xu Zhenping, Yang Xianzhang, Li Yong, Cai Zhenzhong, Zhou Lu. Major breakthrough and exploration significance of Well Ketan 1 in Kuqa Depression, Tarim Basin[J]. China Petroleum Exploration, 2023, 28(2): 1-10.

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