Breakthrough and potential of natural gas exploration in multi-layer system of Penglai gas area in the north of central Sichuan paleo-uplift

被引：0
|
作者：
Yang Y. [1 ,2 ]
Wen L. [1 ,2 ]
Song Z. [3 ]
Zhang B. [1 ,2 ]
Yan W. [1 ,2 ]
Zhou G. [1 ,2 ]
Tian X. [1 ,2 ]
Zhong Y. [1 ,2 ]
He Y. [1 ,2 ]
Ma K. [1 ,2 ]
Li K. [1 ,2 ]
Yang D. [1 ,2 ]
Sun Y. [1 ,2 ]
Ge B. [3 ]
Yang Z. [3 ]
机构：
[1] PetroChina Southwest Oil and Gas Field Company, Sichuan, Chengdu
[2] Exploration and Development Research Institute, PetroChina Southwest Oil and Gas Field Company, Sichuan, Chengdu
[3] State Key Laboaratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing
来源：
Shiyou Xuebao/Acta Petrolei Sinica | 2022年 / 43卷 / 10期
关键词：
central Sichuan paleo-uplift; natural gas exploration; Penglai gas area; three-dimensional accumulation; ultra-deep layer;
D O I：
10.7623/syxb202210001a
中图分类号：
学科分类号：
摘要：
In recent 3 years, breakthroughs have been made in exploration of Member 2 and 4 of Dengying Formation of Upper Sinian in Sichuan Basin, Member 1 of Canglangpu Formation of Lower Cambrian, and Member 2 of Maokou Formation of Permian in the north slope of the central Sichuan paleo-uplift. After the discovery of Anyue gas area, a new large gas area of trillion cubic meters, namely Penglai gas area, has been formed. Under the joint control of large extensional strike-slip faults, paleo-taphrogenic trough and platform margin zones, multi-layer large-scale source rocks, reservoirs and fault-controlled lithogic traps are vertically developed upwards in Penglai gas area; the good source-reservoir configuration and vertical transport pathways promote the efficient filling of multi-layer oil and gas; the tectonic evolution of "ancient upift and present slope" ensures the efficient accumulation of oil and gas; the development of direct cap rocks and regional cap rocks in the multilayer system provides good conditions for hydrocarbon preservation Thanks to the good spatio-temporal collocation of accumulation elements, the Sinian-Permian system in Penglai gas area has formed a unique three-dimensional accumulation model of deep, ultra-deep, mutli-layer and marine carbonate rocks in the loope area, i. e., "three-dimensional hydrocarbon supply, three-dimensional reservoir formation, three dimensional transportation, early oil and late gas, three-dimensional accumulation". The breakthrough in the natural gas exploration in multi-layer system of Penglai gas area can not only greatly expand the exploration of deep and ultra-deep natural gas in Sichuan Basin, but also prove that after multi-period tectonic movements, the ultra-deep and ultra-old strata at the slope of the ancient uplift still have the potential to form large-scale natural gas accumulation, which is of great significance for guiding the further exploration of ultra-deep natural gas in Sichuan Basin. © 2022 Science Press. All rights reserved.
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页码：1351 / 1368and1394
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