确定烃源岩有效排烃总有机碳阈值的方法及应用

发布时间：2018-01-21 10:07

本文关键词： 总有机碳阈值生烃量残留烃量饱和吸附排烃源岩油气生成　出处：《石油实验地质》2017年03期 　论文类型：期刊论文

【摘要】：针对油气地质学中排烃源岩难以识别的问题,依据生排烃原理,利用常规烃源岩有机碳和热解(Rock-Eval)分析测试参数,建立了判别排烃源岩的实用方法。该方法主要基于生烃量参数[I_(HC)=S_1/w(TOC)]和沥青转化率[w(A)/w(TOC)],判别排烃源岩的总有机碳阈值,高于该值的烃源岩即为排烃源岩。根据分析测试资料,对准噶尔盆地和三塘湖盆地二叠系芦草沟组、酒泉盆地营尔凹陷和青西凹陷白垩系下沟组以及鄂尔多斯盆地上三叠统延长组长7段的排烃源岩进行判别,判别效果较好,应用该方法时要求烃源岩的母质特征与热演化程度接近。由于气态烃易散失,所以采用的参数主要反映烃源岩中生成的液态烃量。该方法对于油源岩的判别更为有效。
[Abstract]:In view of the difficulty of identifying hydrocarbon expulsion source rocks in oil and gas geology, according to the principle of hydrocarbon generation and expulsion, the test parameters are analyzed by using conventional organic carbon and pyrolysis Rock-Eval. A practical method for judging hydrocarbon expulsion source rock is established, which is mainly based on hydrocarbon generation parameters. [I / W / S / S / S / T / C] and bitumen conversion. [According to the total organic carbon threshold of the source rock, the source rock above this value is the hydrocarbon expulsion source rock. The source rocks of Lucaogou formation of Permian in Junggar basin and Santanghu basin, Yinger sag of Jiuquan basin and Xiagou formation of Cretaceous in Qingxi depression and Yanchang 7 member of Upper Triassic in Ordos Basin are distinguished. The discriminant effect is good. The application of this method requires that the source rock's parent material characteristics are close to the thermal evolution degree, and that the gaseous hydrocarbon is easy to be lost. Therefore, the parameters used mainly reflect the amount of liquid hydrocarbon generated in the source rock, and the method is more effective in judging the source rock.
【作者单位】：中国石油大学(北京)油气资源与探测国家重点实验室;中国石油玉门油田青西作业区;中国石油华北油田分公司地球物理勘探研究院;
【基金】：中国石油股份公司科技重大专项(2012E330) 中国石油第四次油气资源评价(2013E-050209)资助
【分类号】：P618.13
【正文快照】： 甘肃玉门735200;3.中国石油华北油田分公司地球物理勘探研究院,河北任丘062552)烃源岩指能生成并排出油气的岩石,有烃类排出是烃源岩的重要表现[1-3]。油气生成与排出并存的烃源岩即有效烃源岩,可从定性和定量两方面确定。定性方法从概念角度判别烃源岩是否有效,包括有机质丰

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