摘要
Abstract
After the industrial gas flow was obtained in the exploratory well LG1 in the LG area, several other wells were successively drilled around this well. It is urgent to understand the lateral variation of reservoirs, vertical distribution of gas and water layers and the location of gas-water contact. Therefore, the MDT logging was carried out in over 10 exploratory wells and appraisal wells in the LG area to define the relationship among various gas reservoirs of reef and beach facies in the Permian Changxing Formation and that among gas reservoirs of oolitic beach facies in the Triassic Feixianguan Formation. The following results were obtained. For the reservoirs of oolitic beach facies in the Feixianguan Formation, the wells LG1, LG001-1, LG001-3 and LG001-6 share the same pressure system, while the wells LG2, LG3 and LG6 belong to different pressure systems. In contrast, for the reservoirs of reef and beach facies in the Changxing Formation, the wells LG1 and LG2 do not belong to the same pressure system, the wells LG001-1 and LG001-3 share the same pressure system, the wells LG12 and LG28 also share the same pressure system, while both wells LG8 and LG11 have a separate pressure system. These results provide direct basis for single well formation pressure analysis, identification of gas and water layers, pressure system analysis as well as later reserve estimation and development planning.关键词
四川盆地/地层压力/气藏规律/气水界面/测试/晚二叠世/早三叠世/应用Key words
Sichuan Basin/MDT logging technology/formation pressure/gas reservoir/pattern/gas-water contact/test/Late Permian/Early Triassic/application分类
天文与地球科学
