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塔河油田碳酸盐岩储集层主要为岩溶作用、多期构造叠加及构造变形作用形成的缝洞型储集层,裂缝具有连通有效储存空间的桥梁作用。区分构造裂缝与非构造裂缝,结合塔河油田构造特征,并对碳酸盐岩储层裂缝特征、分类及其成因进行了分析。研究表明:构造裂缝为塔河油田岩溶储层发育提供了流体运移通道,为油气的运移,特别是垂向运移提供了条件;非构造裂缝的存在改善了储层储渗性能,扩大了储层泄油面积。构造裂缝和非构造裂缝的存在作为储层的有利影响因素,对其进行深入研究可以为碳酸盐岩储层开发提供有益参考,并可增加储层预测产量。
The carbonate reservoir in Tahe Oilfield is mainly a fractured-cave reservoir formed by karstification, multi-period tectonic superimposition and tectonic deformation, and the fractures have the function of a bridge communicating with effective storage space. Distinguishing structural fractures from non-structural fractures, combined with the structural characteristics of the Tahe oilfield, and analyzing the characteristics, classification and causes of fractures in carbonate reservoirs. The results show that tectonic fractures provide fluid migration channels for the development of karst reservoirs in Tahe Oilfield and provide conditions for the migration of oil and gas, especially for vertical migration. The existence of non-structural fractures improves reservoir permeability and expands Drainage area of the reservoir. The existence of tectonic fractures and non-structural fractures is a favorable influencing factor for reservoir. In-depth study of them can provide useful reference for the development of carbonate reservoirs and increase the predicted production of reservoirs.