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: CHEN Fangfang DING Zhiwen LI Erpeng LI Yang SHI Tao SUN Xiaohui WANG Rujun XIAN Bo YANG Jianping YANG Zhimin ZHU Zhongqian ZUO Chao
• 来源期刊: 石油勘探与开发:英文版
• 学科: 地球科学
• 关键词: Tarim Basin Halahatang oilfield South Tahe area ORDOVICIAN fault-karst carbonate reservoir hydrocarbon accumulation oil-gas enrichment
• 年，卷（期）: 2020,（2）
• 页码范围: 306-317
• 页数: 12页
• 分类号: P618.13

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.