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塔里木盆地大型碳酸盐岩台地形成与构造演化过程中,发育了台缘礁、台内滩与深层白云岩等巨厚的碳酸盐岩建造,经过多期构造运动形成了种类繁多、规模巨大的岩溶缝洞系统,是台盆区海相碳酸盐岩油气勘探开发的重要领域.基于野外露头与井下地质、岩样分析、地球物理预测及岩溶地质刻画,静态特征与生产动态等多学科动静态一体化研究,阐明了洞穴、溶蚀孔洞、裂缝等储集空间发育特征及大型岩溶缝洞系统的形成机理;创建了与不整合暴露、断裂破碎相关的岩溶叠合复合发育模式;揭示了不整合面相关岩溶横向广泛分布、断层相关岩溶纵向局部拓展及其三维展布规律;提出叠合复合岩溶缝洞系统是油气复式成藏的关键,亦是复式油气聚集区立体勘探开发的基础,叠合复合岩溶模式的建立有效指导了塔中隆起碳酸盐岩凝析气田的重大发现与高效开发.
During the formation and tectonic evolution of the large-scale carbonate platform in the Tarim Basin, carbonate rocks such as Taiyuan Reef, Taitung Beach and deep dolomite were developed. After a large number of tectonic movements, a large variety of large-scale carbonate rocks Of the karst cave system is an important area for marine carbonate rock exploration and development in the basin basin.Based on the field outcrop and downhole geology, rock sample analysis, geophysical prediction and karst geological characterization, static characteristics and production dynamics and other disciplines The study of dynamic and static integration shows that the developmental characteristics of reservoir space such as caves, dissolved pores and fractures, and the formation mechanism of large-scale karst cave systems have been elucidated. The karst superimposed composite development model related to unconformity exposure and fracture fragmentation has been established. The karst horizontal distribution related to the unconformities, the vertical extension of the karst associated with the faults and the three-dimensional distribution rule of the karst are proposed. It is suggested that the superimposed complex karst fracture-cave system is the key to the hydrocarbon accumulation in the oil and gas pools and the basis for the three- The establishment of superimposed complex karst model has effectively guided the great discovery and efficient development of the carbonate gas condensate field in the Tazhong uplift.