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Accumulation Conditions of Shale‐Gas from the Lower Cambrian Niutitang Formation in Central Guizhou Uplift and Its Periphery
Author(s) -
YANG Changqing,
XU Honglong
Publication year - 2015
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12304_32
Subject(s) - geology , shale gas , oil shale , paleontology , geochemistry
Shale gas is unconventional natural gas existed in shale in the form of absorption, detached state or others. It is typical pattern of ‘self-generation and selfreservoir, situ accumulation’. Shale gas is an abundant resource in China with 25 ×10m recoverable resource. Many sets of Cambrian and Silurian marine shales were developed in the southern marine Paleozoic which formed basic geological condition for generating shale gas. With Jiaoshiba shale gas field in the southeast margin of upper Yangtze region explored in Silurian and commercial gas flow obtained in Cambrian and Silurian in Weiyuan, Sichuan,the southeast of upper Yangtze Rejion including central Guizhou uplift and its periphery has become major area for marine shale gas exploration in China. Central Guizhong uplift and its periphery area including North Guizhou depression, Central Guizhou uplift and South Guizhou depression locates at southeast of Upper Yangtze platform and east of Yadu-Ziyun-Luodian fault zone, which is adjacent to Xuefeng uplift, Wuling depression in the east and Central Guangxi depression in the south and East Yunnan uplift and Southwest Guizhou depression in the west and Sichuan basin in the north. It is a broad structure transition area developed at Upper Yangtze platform and margin of ancient south China mainland belongs to shelf waters of original sea basin.