吴起-志丹地区长7优质烃源岩特征及分布研究

综合利用岩心、测井曲线、烃源岩总有机碳含量、烃源岩热解、烃源岩镜质体反射率等资料,研究了吴起-志丹地区长7层烃源岩主要特征,综合评价了其生烃潜力,建立了该地区长7优质烃源岩评价标准,刻画了优质烃源岩的分布范围,研究结果表明,吴起-志丹地区长7层烃源岩有机质丰度和生烃转化率较高,具有良好的生烃潜力,干酪根主要为Ⅱ1型,周长北部地区为Ⅱ2型,生烃母质为腐泥-腐殖型。优质烃源岩主要分布在西南樊学和南部的马营区域。

Study on distribution regularities of high-quality source rocks in Chang-7 reservoirs of Wuqi-Zhidan region

By fully use of core data,well logging curve,total organic carbon content of source rocks,hydrocarbon source rock pyrolysis,hydrocarbon source rocks of vitrinite reflectance data,etc.,the study on distribution regularities of high-quality source rocks in Chang-7 reservoirs of WuqiZhidan region has been carried out.And the hydrocarbon generation potential has been evaluated. The evaluation standard of high-quality source rocks has been established and the distribution range of preferable source rocks has been made clear.The study results indicate the source rocks in Chang-7 reservoirs have high organic matter abundance and high hydrocarbon generation conversion rate.Therefore,it has a good hydrocarbon generation potential and the preferable source rocks are mainly distributed in Fanxue area in the southwest and Maying area in the south.