鄂尔多斯盆地中西部长7段烃源岩及致密油潜力评价

发布时间：2018-04-15 15:23

本文选题：鄂尔多斯盆地 + 延长组　；参考：《新疆石油地质》2017年05期

【摘要】：由于对鄂尔多斯盆地中西部地区延长组长7段烃源岩缺乏深入研究,制约了该区油气勘探的进程。为了阐明其烃源岩生烃条件,在大量资料和前人研究成果的基础上,对该区长7段烃源岩的分布和地球化学特征进行了系统分析,预测了油气有利勘探区,为研究区延长组致密油勘探提供依据。研究表明,长7段沉积期,研究区烃源岩沉积中心位于姬塬、耿湾、环县东部及白豹—纸坊地区,长7段暗色泥岩平均累计厚度大,烃源岩有机质类型好,丰度高,热演化程度较高,已进入生油阶段,属于典型的优质湖相烃源岩,是该区延长组油藏的主力烃源岩。在研究区圈定了6个有利勘探区,分别位于定边以南的油房庄西部地区、姬塬以东地区、铁边城以南地区、铁边城东北部地区、环县东北部地区以及白豹以南地区。
[Abstract]:Due to the lack of in-depth study on the source rocks of member 7 of Yanchang formation in the central and western part of Ordos Basin, the process of oil and gas exploration in this area is restricted.In order to elucidate the hydrocarbon generation conditions of the source rocks, the distribution and geochemical characteristics of the source rocks in the Chang7 member of the area are systematically analyzed on the basis of a great deal of data and previous research results, and the favorable exploration areas for oil and gas are predicted.It provides the basis for the exploration of dense oil in Yanchang formation of the study area.The results show that the sedimentary center of source rocks is located in Jiyuan, Gengwan, Huanxian and Baibao-Zhifang area during the period of Chang 7 formation. The average accumulated thickness of dark mudstone in Chang7 member is large, the organic matter type of source rock is good, and the abundance of source rock is high.The thermal evolution is relatively high and has entered the stage of oil generation. It is a typical high quality lacustrine source rock and is the main source rock of the Yanchang formation reservoir in this area.Six favorable exploration areas were delineated in the study area, which are located in the western area of Youfangzhuang, south of Dingbian, east of Jiyuan, south of Tiebian City, northeast of Tibian City, northeast of Huanxian County and south of Baibao.
【作者单位】：中国石油大学油气资源与工程国家重点实验室;中国石油大学盆地与油藏研究中心;
【基金】：国家自然科学基金(41372143) 高等学校博士学科点专项科研基金(20130007110002)
【分类号】：P618.13

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