东濮凹陷北部沙三上亚段页岩油成藏地质条件与有利区优选  

Geological Condition and Favorable Areas of Shale Oil in Upper-submember of Es3 Formation in Northern Dongpu Sag

作　　者：邓恩德 张金川[1] 张鹏[1] 尉菲菲 苏惠[2] 吕艳南[1] 隆帅 

机构地区：[1]中国地质大学(北京)页岩气勘查与评价国土资源部重点实验室,北京100083 [2]中国石化中原油田勘探开发科学研究院,河南濮阳457001

出　　处：《山东科技大学学报（自然科学版）》2015年第3期28-37,共10页Journal of Shandong University of Science and Technology(Natural Science)

基　　金："构造与油气资源"教育部重点实验项目(TPR-2013-04)

摘　　要：通过对东濮凹陷北部沙三上亚段页岩油的沉积环境、地球化学特征、泥页岩展布特征和含油率等进行分析,认为东濮凹陷北部沙三上亚段沉积环境以湖泊相为主,泥页岩整体厚度大,分布范围广;有机质类型以Ⅱ1和Ⅱ2型为主,总有机碳含量平均为0.58%,氯仿沥青"A"含量均值为0.11%,生烃潜量均值为0.49mg/g,镜质组反射率平均值0.85%,有机质进入生烃高峰期;页岩储集空间类型多样,微米级、纳米级孔喉和微裂隙较为发育,脆性矿物含量较高,大部分样品都大于50%,利于页岩油后期的开发生产;氯仿沥青"A"法和热解法测得含油率的均值分别为0.230 2,0.227 8,说明研究区整体具有较好的生油潜力。根据泥页岩展布及其有机地化特征对勘探有利区进行预测,其中Ⅰ类有利区主要位于以盐湖相和深湖-半深湖相沉积为主的濮城和庆祖集地区。The sedimentary environment,geochemical characteristics,shale distribution and oil content of shale oil in the upper-submember of Es3 in northern Dongpu Sag were analyzed in this paper.The results show that the main sedimentary environment of the upper-submember of Es3 in northern Dongpu Sag is lake facies with thick and widely-distributed shale.With an average of 0.58% in TOC,0.11%in chloroform bitumen ＂A＂content,0.49 mg/g in potential hydrocarbon generation amount and 0.85% in Ro,the organic matters II1 and II2are in the peak of hydrocarbon generation.With diverse types of reservoir space and more developed micron,nanometer pore throat and micro fissures,there is a high content of brittle minerals,greater than 50% in most of the samples,which is beneficial to the late development and production of shale oil.With the respective oil rate of 0.230 2 and 0.227 8 measured by chloroform bitumen＂A＂method and pyrolysis method,the research area has good hydrocarbon generating potential.Based on organic shale distribution and geochemical characteristics,the exploration target area forecasting shows that the favorable areas of class I are mainly located in Pucheng and Qingzuji where the main sedimentary environments are saline lake facies and deep-semi deep lake facies.

关 键 词：页岩油 东濮凹陷北部 沙三上亚段 地球化学特征 含油率 有利区 

分 类 号：TE122[石油与天然气工程—油气勘探]