中国近海潜在富烃凹陷评价方法与烃源岩识别

摘要

There are still a number of unproved and potential hydrocarbon-rich sags with lower exploration maurity except some proved ones offshore China, and it is necessary to strengthen the evaluation of potential hydrocarbon-rich sags and look for new hydrocarbon-rich sags. An evaluation method of potential hydrocarbon-rich sags is presented here, in which the key is locating rich sags (or subsags) -selecting rich plays-optimizing regional breakthrough targets, and the core in locating rich sags (or subsags) is to identify the effective hydrocarbon source rocks. The approaches of oil source tracking and seismic facies analysis have been used to (qualitatively and quantitatively) identify the source rocks in Liaoxi, Enping and Wushi sags, and the drilling results have indicated that they are hydrocarbon-rich sags and have great exploration potential.%除了已证实的富烃凹陷外,中国近海还有一批勘探程度较低、潜力未被证实的潜在富烃凹陷,因此加强潜在富烃凹陷评价,寻找新的富烃凹陷很有必要.提出了潜在富烃凹陷评价方法,其关键是定富凹(洼)-选富带 优选领域性突破目标,其中定富凹(洼)的核心是识别有效烃源岩.分别应用油源追踪法和地震相分析法进行了辽西凹陷、恩平凹陷和乌石凹陷等潜在富烃凹陷烃源岩识别(包括定性与定量),钻探结果已证实它们均为富烃凹陷,具有很好的油气勘探潜力.