川东嘉二段（T1j2）储层概念模式

川东嘉二段储层的形成受沉积作用和成岩作用的双重控制,受限海台环境是储层发育的有利相带,早期暴露溶蚀和白云化作用是孔隙层形成的必要条件。提出了反映储层形成机制、演化和分布规律的沉积模式、成岩模式、孔隙层成因模式和储层分布模式。这些多层次概念模式对嘉二段气藏勘探和开发挖潜具积极的指导意义。

CONCEPTUAL NODELS FOR THE RESERVOIRS IN THE SECOND MEMBER OF THE JIALINGJIANG FORMATION IN EASTERN SICHUAN

The formation of the reservoirs in the second member of the Jialingjiang Formation in eastern Sichuan is dually controlled by sedimentation and diagenesis. The results of research indicate that the reservoirs were substantially generated in the restricted submarine plateau environments. The early exposure, corrosion and dolomitization are considered as the essential conditions for the formation of the reservoirs. In this paper, several models including the sedimentary, diagenetic, genetic and distribution models have been put forward to elucidate the formation mechanism, evolution and distribution of the reservoirs.These modles are very useful for the exploration and exploitation of gas pools in the study area.