气候变化领域集成服务门户(CCPortal): New directions in an established gas play: Promising dolomite reservoirs in the middle triassic leikoupo formation of the Sichuan Basin, China

CCPortal

DOI	10.1306/05111816502
	New directions in an established gas play: Promising dolomite reservoirs in the middle triassic leikoupo formation of the Sichuan Basin, China
	He D.; Ma Y.; Li Y.; Wu S.
发表日期	2019
ISSN	0149-1423
卷号	103 期号:1
英文摘要	The discovery of carbonate gas fields in the Middle Triassic Leikoupo Formation of the SichuanBasin has a complex history. In recent years, a series of structural fields have been discovered in the western Sichuan Basin. Their discovery confirms the immense exploration potential of the Leikoupo Formation. In this study, we analyze the characteristics of Leikoupo Formation exploration plays using exploration wells and test data, aiming to provide a reference for further discoveries. The Leikoupo Formation represents the uppermost unit in the Sichuan marine carbonate platform succession. During its deposition, the whole basin was characterized by a restricted and evaporitic platform. Two classes of reservoirs developed. One is pore-fracture reservoirs, in marginal platform and intraplatform shoals, and another is fracture-vug reservoirs in the karstic weathering crust of the formation-capping unconformity. Three hydrocarbon accumulation models were established for the Leikoupo Formation based on the spatial and temporal relationship among the source, reservoir, and cap rocks. Two types of exploration plays are present in the Leikoupo Formation, that is, shoal (including intraplatform shoal and marginal platform shoal) dolomite plays and karstic dolomite weathering crust plays (including intraplatform shoal karst and marginal platform shoal karst). The western Sichuan depression in the karstic slope belt presents immense exploration potential because of a proximal hydrocarbon supply, charging via an extensive fracturenetwork, shoals and karstic reservoir, a good seal rock of terrestrial mudstone, and potential composite hydrocarbon accumulations in stratigraphic traps,making it a promising area for future exploration. © 2019. The American Association of Petroleum Geologists.
语种	英语
scopus关键词	Discovery wells; Fracture; Gas industry; Hydrocarbons; Stratigraphy; Weathering; Dolomite reservoirs; Exploration potential; Fracture reservoirs; Hydrocarbon accumulation; Marine carbonates; Structural fields; Temporal relationships; Western Sichuan basin; Petroleum prospecting; cap rock; carbonate platform; chemical weathering; composite; dolomite; gas field; gas well; hydrocarbon exploration; source rock; Triassic; China; Sichuan Basin
来源期刊	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/125088
作者单位	Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism, China University of Geosciences, Ministry of Education, Haidian District, Beijing, China; China Petrochemical Corporation, Chaoyangmen, Chaoyang District, Beijing, China
推荐引用方式 GB/T 7714	He D.,Ma Y.,Li Y.,et al. New directions in an established gas play: Promising dolomite reservoirs in the middle triassic leikoupo formation of the Sichuan Basin, China[J],2019,103(1).
APA	He D.,Ma Y.,Li Y.,&Wu S..(2019).New directions in an established gas play: Promising dolomite reservoirs in the middle triassic leikoupo formation of the Sichuan Basin, China.AAPG Bulletin,103(1).
MLA	He D.,et al."New directions in an established gas play: Promising dolomite reservoirs in the middle triassic leikoupo formation of the Sichuan Basin, China".AAPG Bulletin 103.1(2019).