浅析中国中西部盆地煤系烃源岩成烃研究

PRELIMINARY RESEARCH OF COAL SOURCE ROCK FORMING HYDROCARBON IN BASIN OF CENTER-WEST CHINA

烃源岩作为石油、天然气的母源 ,在油气地质研究和油气勘探中占有相当重的位置。伴随着传统生油理论“源控论”的发展 ,煤系烃源岩的发展也得到广泛的关注 ,其研究内容也不断拓展。根据煤系烃源岩的有机质丰度及相关指标 ,指出煤系烃源岩可以成烃 ,只是作为未成熟—低成熟的向油气转化阶段 ,同时也能够在一定条件下成为具有工业性价值的煤系地层油气藏。中国西北部地区广泛存在煤系地层 ,同时也发现煤系有机质转化为烃类 ,对比西北部 ,中国中西部的含煤地层 ,存在构造的复杂因素 ,在转化过程中考虑的因素很多 ,因此在研究煤系地层的成烃作用时 ,必须慎重 。

Source rock acts as matrix source rock of petroleum and natural gas, which acts as an important affection at petroleum investigation or exploitation domain. With the development of traditional theoretic of source decision, coal source rock theory gets more focus ions and its contents get enlargement, on basis of organic matter parameters or related parameters of coal source rock. We know coal source rock can form hydrocarbon but only as its line in under-mature or lower-mature stages and then that can form commercial petroleum pool on some special condition. There is much coal source rock in north-west China and also exist some petroleum pools which are formed from coal source rock. But to center-west China's coal stratums, because of many complex infections, during the process of discussing conformation of organic matter in coal source rock. We should focus on more infections parameter and then decide whether the coal source rock can form petroleum pool.