渤海湾盆地南堡凹陷东营组东三段烃源岩排烃特征  

Hydrocarbon-expulsion Characteristics of Source Rocks in the 3rd Member of Dongying Formation in the Nanpu Sag,Bohai Bay Basin

作　　者：陈雪 姜福杰[1,2] 赵忠新[3] 王建伟[3] CHEN Xue;JIANG Fu-jie;ZHAO Zhong-xin;WANG Jian-wei(State Key Laboratory of Petroleum Resource&Prospecting,Beijing 102249,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;Petrochina Jidong Oilfield Company,Tangshan 063000,China)

机构地区：[1]油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)地球科学学院,北京102249 [3]中国石油冀东油田分公司,唐山063000

出　　处：《科学技术与工程》2020年第14期5566-5574,共9页Science Technology and Engineering

基　　金：国家科技重大专项(2016ZX05006-006)。

摘　　要：为判定南堡凹陷东三段烃源岩的有效性,利用加权平均的方法,对单井烃源岩有机地球化学指标进行计算。采用单井分析测试数据与地震反演、沉积相、构造埋深等资料“点-面”相互结合、验证的方法,对烃源岩的厚度、有机质丰度、有机质类型和热演化程度进行平面预测与评价。在此基础上,应用生烃潜力法对东三段烃源岩的排烃特征进行分析,厘定烃源岩排烃门限,确定东三段存在有效烃源岩。结果表明,东三段烃源岩的主要排烃期为明化镇组沉积时期,排烃门限对应的镜质体反射率为0.82%,对应深度为3620 m。东三段烃源岩的生烃量和排烃量分别为13.79×10^8 t和5.52×10^8 t。综合而言,东三段烃源岩能够排烃,且在凹陷内属于晚期排烃,具有一定的资源前景。To determine whether the hydrocarbon source rocks in the 3rd Member of Dongying formation in the Nanpu sag are effective,the geochemical indexes of single well source rocks were calculated by using the weighted average method.Using the combinaed verification of single well analytical test data with seismic inversion,sedimentary facies,tectonic burial depth and other data“point-surface”,plane prediction and evaluation of hydrocarbon source rock thickness,organic matter abundance,organic matter type and thermal evolution degree of source rocks were carried out.Based on this,the hydrocarbon expulsion characteristics of source rocks in the 3rd member of Donging formation were analyzed by using the method of hydrocarbon generation potential.The hydrocarbon expulsion threshold of source rocks was determined,and the existence of effective source rocks in the 3rd member of Donging formation was determined.Results show that the main hydrocarbon expulsion period of source rocks in the 3rd member of Dongying formation is the sedimentary period of Minghuazhen formation.The vitrinite reflectance corresponding to the hydrocarbon expulsion threshold is 0.82%and the depth is 3620 m.The hydrocarbon generation and expulsion of the source rocks in the 3rd member of Dongying formation are 13.79×10^8t and 5.52×10^8t respectively.Generally speaking,the source rocks of the 3rd member of Dongying formation can discharge hydrocarbon,and belongs to the late stage of hydrocarbon expulsion,which has a good resource prospect.

关 键 词：南堡凹陷 东三段 烃源岩 排烃特征 资源评价 

分 类 号：TE122[石油与天然气工程—油气勘探]