【摘要】 古岩溶为地质历史时期而非现代营力环境下形成的岩溶,深岩溶为不受地表侵蚀基准面控制环境条件下的深埋藏岩溶作用。碳酸盐岩储层储集空间主要有溶蚀孔洞、溶缝等,非均质性明显,空间分布规律复杂,经历了漫长的岩溶作用过程,油气储集规律复杂。油气田碳酸盐岩的内在因素(结构成因类型、物理力学性质等)以及各地质历史时期所处的地质环境构成古岩溶的形成条件与影响控制因素。本文将古岩溶的形成机制及其与油气聚集关系作为研究重点与突破口,系统研究了古岩溶和深岩溶的形成条件、影响控制因素与发育特征,最终实现了预测油气聚集有利发育区目标。更多还原

【Abstract】 Palaeo-karst was formed under an ancient stress condition in geological history, and deep karst was formed in a deep buried condition not controlled by the base level of erosion. The major carbonate reservoir space consists of dissolved pores, fractures and caves with obvious heterogeneous anisotropic characteristics and complex distribution features because of the endless karstic process. The formation conditions and controlling factors are composed of the inner factors of carbonate, such as the type of structure, the physical mechanic property, and the geo-environment in every geological epoch. This paper emphasizes the formation mechanism of palaeo-karst and the relationship between palaeo-karst and oil-gas accumulation, and forecasts the favorable areas of oil-gas accumulation on the basis of a systematic study of the formation conditions, the controlling factors and the developmental characteristics of palaeo-karst and deep karst.更多还原