Origin, hydrocarbon accumulation and oil-gas enrichment of fault-karst carbonate reservoirs: A case study of Ordovician carbonate reservoirs in South Tahe area of Halahatang oilfield, Tarim Basin
作者：DING Zhiwen,WANG Rujun,CHEN Fangfang,YANG Jianping,ZHU Zhongqian,YANG Zhimin,SUN Xiaohui,XIAN Bo,LI Erpeng,SHI Tao,ZUO Chao,LI Yang
摘要：Based on comprehensive analysis of tectonic and fault evolution, core, well logging, seismic, drilling, and production data, the reservoir space characteristic, distribution, origin of fault-karst carbonate reservoir in Yueman block of South Tahe area, Halahatang oilfield, Tarim Basin, were studied systematically. And the regular pattern of hydrocarbon accumulation and enrichment was analyzed systematically based on development practice of the reservoirs. The results show that fault-karst carbonate reservoirs are distributed in the form of "body by body" discontinuously, heterogeneously and irregularly, which are controlled by the development of faults. Three formation models of fault-karst carbonate reservoirs, namely, the models controlled by the main deep-large fault, the secondary fault and the secondary internal fault, are built. The hydrocarbon accumulation and enrichment of fault-karst carbonate reservoirs is controlled by the spatiotemporal matching relation between hydrocarbon generation period and fault activity, and the size and segmentation of fault. The study results can effectively guide the well deployment and help the efficient development of fault-karst carbonate reservoirs of South Tahe area, Halahatang oilfield.
发文机构：PetroChina Tarim Oilfield Company
关键词：TarimBasinHalahatangoilfieldSouthTaheareaORDOVICIANfault-karstcarbonatereservoirhydrocarbonaccumulationoil-gasenrichment
分类号： P618.13[天文地球—矿床学]
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