Accumulation process and pattern of oolitic shoal gas pools in the platform: A case from Member 3 of Lower Triassic Feixianguan Formation in the Heba area, northeastern Sichuan Basin

被引：0
作者：
Li H. [1 ,2 ]
机构：
[1] Exploration and Production Research Institute, SINOPEC, Beijing
[2] Key Laboratory for Marine oil and Gas Exploitation, SINOPEC, Beijing
来源：
Li, Hongtao (liht.syky@sinopec.com) | 1600年 / Science Press卷 / 43期
关键词：
Feixianguan Formation Member 3; Fluid inclusions; Gas source analysis; Heba area; Pool-forming periods; Sichuan Basin; Thermal evolution history;
D O I：
10.11698/PED.2016.05.07
中图分类号：
学科分类号：
摘要：
Combined with the regional sedimentary burial history and trap tectonic evolution history, the gas source, pool-forming periods and accumulation process of the oolitic shoal limestone gas pool in the Lower Triassic Feixianguan Formation Member 3 were researched in the Heba area of northeast Sichuan Basin. The gas source was mainly derived from the underlying Upper Permian Wujiaping Formation (or Longtan Formation) according to the analysis results of carbon isotopic compositions of individual hydrocarbons. The analysis of homogenization temperature for fluid inclusions shows, the gas pool has experienced multi-stage gas generation and migration, which occurred in the Late Jurassic to Early Cretaceous, matched with the generating peak of the Upper Permian source rocks, and represented the main period for hydrocarbon accumulation. The formation process of the Heba area had structural prototype in Indo-Chinese Epoch, and was relatively stable stage in the Jurassic to Early Cretaceous, and was formed like present structure in the Late Cretaceous, and was complicated in the Cenozoic Himalayan period. It is predicted that the sedimentary micro-paleogeomorphology highs, faults or fracture relative development area and the ancient-modern structure development zone are favorable for oolitic shoal limestone gas pools in Northeast Sichuan. © 2016, The Editorial Board of Petroleum Exploration and Development. All right reserved.
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页码：723 / 732
页数：9
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