川南,川西南地区三叠系嘉陵江组断层圈闭气藏

FAULT TRAP GAS RESERVOIRS OF JIALINGJIANG FORMATION OF TRIASSIC SYS-TEM IN SOUTH AND SOUTHWEST AREAS OF SICHUAN

: Although Jialingjiang Formation of Triassic system in south and southwest ar-eas of Sichuan is tight carbonate deposition leached by early fresh water and its structure is reformed in a later period,the tight carbonate formation can become multiple porous fracture layered reservoirs,and then become fault trap oil and gas reservoirs. Many boring data proves that carbonate of Jialingjiang Formation generally has better barrier condition for oil and gas after faulted. Based on form types and shapes,fault traps in Jialingjiang Formation can be de-vided into six types and their success ratio of exploration reaches 70. 5%.