摘要
东濮凹陷古近系盐间地层具有较好的页岩油资源潜力,但目前对其岩相类型、含油性及其影响因素尚未进行过系统研究,制约了对页岩油富集规律的认识和勘探工作的顺利开展。文中利用文410和濮156两口新钻井的连续取心资料,通过系统地测试分析,深入研究了盐间细粒沉积岩的岩相类型和含油性特征。结果显示,东濮凹陷盐间主要发育层状黏土岩、层状长英质黏土岩、层状黏土质混合岩、块状碳酸盐岩、纹层状黏土质碳酸盐岩、纹层状碳酸质混合岩、块状长英质混合岩和盐岩等8种细粒沉积岩岩相。其中:纹层状碳酸质混合岩有机质丰度高,发育大量的微裂缝、溶蚀孔和有机孔,含油性好,是页岩油勘探的有利岩相类型;层状黏土质混合岩具有一定的有机质丰度,并且发育少量的层间缝,含油性中等,部分层段具有一定的页岩油勘探潜力;层状黏土岩岩石致密,有机质丰度低,微裂缝、溶蚀孔和有机孔不发育,含油性差。
The paleogene salt-layers in Dongpu Depression has a good shale oil resource potential,but there is no systematic study on the lithofacies types,oil-bearing property and their influencing factors,which restricts the understanding of shale oil enrichment law and the smooth development of exploration work.Based on the continuous well core of W410 and P156 wells,the lithofacies types and oil-bearing characteristics of salt-layer fine grained deposits are analyzed through systematic testing and analysis.The results show that there are mainly eight kinds of fine grained sedimentary lithofacies,including layered clay rock,layered felsic clay rock,layered clay migmatite,massive carbonate rock,laminar clayey carbonate rock,laminar carbonate migmatite,massive felsic migmatite and salt rock.Laminar carbonatite migmatite facies is a favorable lithofacies type for shale oil exploration due to its high abundance of organic matter,a large number of micro-fractures,dissolution pores and organic pores,and good oil-bearing property.The layered clay migmatite has a certain abundance of organic matter and a small amount of interlayer fractures,with medium oil content.Some layers have certain shale oil exploration potential.The layered clay rock is dense,with low organic matter abundance,and poor oil-bearing property due to the undeveloped micro-fractures,dissolution pores and organic pores.
作者
彭君
周勇水
李红磊
王亚明
康华
徐云龙
PENG Jun;ZHOU Yongshui;LI Honglei;WANG Yaming;KANG Hua;XU Yunlong(Exploration and Development Research Institute,Zhongyuan Oilfield Company,SINOPEC,Zhengzhou 450000,China)
出处
《断块油气田》
CAS
CSCD
北大核心
2021年第2期212-218,共7页
Fault-Block Oil & Gas Field
基金
国家科技重大专项课题“东濮凹陷油气富集规律与增储领域”(2016ZX05006-004)。
关键词
细粒沉积岩
岩相类型
页岩含油性
古近系
东濮凹陷
fine-grained sedimentary rocks
lithofacies types
shale oil-bearing
Paleogene
Dongpu Sag
