鄂尔多斯盆地东缘煤的二次生烃作用与煤层气的富集

SECONDARY HYDROCARBON GENERATION OF COAL AND ACCUMULATION OF COALBED METHANE IN THE EAST MARGIN OF THE ORDOS BASIN

汤达祯 王激流 张君峰 黄文辉

TANG Da-zhen WANG Ji-liu ZHANG Jun-feng HUANG Wen-hui

中国地质大学能源系, 北京 100083 2. 中国石油天然气股份有限公司勘探与生产分公司, 北京 100027

China Uniunity of Geosciences, Beijing 100083, China 2. Exploration and Production Branch, China Peroleum Limited Company, Beijing 100027, China

构造-地热-煤变质演化配置研究表明.在燕山期岩浆异常热影响区块,鄂尔多斯盆地东缘古生代保的煤层气发生量显著.主产气时段集中.二次生烃作用不仅制约着生烃强度,同时决定了煤层气优越的富集和保存条件。

The studies of the allocation of tectonics, geotherm and coal metamorphic evolution indicated that to the Late Paleozoic coals in the east margin of the Ordos Basin, the production rate of coalbed methane is observably high and the time of gas generation is relatively centralized within the sections affected by abnormal geotherm of the Yanshan Period magma. The secondary hydrocarbon generation controlled the intensity of gas generation and determined the superior conditions of accumulation and conservation of coalbed methane as well.

国家自然科学基金(49972053);地质行业科技发展基金(HY979834);石油科技中青年创新基金(98-1)

https://doi.org/10.11781/sysydz200002140