摘要
在对燕山地区冀北坳陷和宣龙坳陷中元古界露头剖面实测、钻井岩心观察的基础上,综合岩石薄片、铸体薄片以及扫描电镜等资料进行综合分析后发现,研究区储集层岩性主要为白云岩,其次是灰岩,还有部分硅质岩、砂岩及角砾岩。储集空间由基质内的微观储集空间和相对宏观的缝、洞储集空间两大储集系统组成,其中宏观储集空间包括构造裂缝、层间缝、溶蚀缝、溶蚀洞(孔)、收缩缝和压溶缝6种类型,基质孔隙包括晶间孔、粒间孔、藻窗孔、微溶孔(缝)、微构造缝及微压溶缝6种类型。沉积环境、岩性、成岩作用和构造作用,是影响研究区储集空间的4个主要因素,其中构造作用、古岩溶作用是改善研究区储集条件的重要因素。
On the basis of field measurement and core observation of Mesoproterozoic outcrops in Jibei depression and Xuanlong depres-sion in Yanshan area,through integrated analysis on common thin sections,cast thin sections and SEM data,it is found that the reservoirrocks in the study area are mostly composed of dolomite,secondly of limestone and partially of siliceous rock,sandstone and breccia.Thestorage spaces of the reservoir are mainly composed of 2 storage systems that are micro-storage spaces in the matrix and macro-storage spac-es of fissures and caves,in which the macro-storage spaces include 6 types such as tectonic fissures,interlayer fissures,dissolution fis-sures,dissolved caves（pores）,constricted fissures and pressolution fissures,and the matrix pores are composed of intercrystalline pores,in-tergranular pores,alga-window pores,slightly dissolved pores（fissures）,micro-tectonic fissures and micro-pressolution fissures.The sedi-mentary environment,lithology,diagenesis and tectonism are the main 4 factors influencing the storage spaces in the study area,amongwhich tectonism and palaeo-karstification are the key factors to improve the storage conditions in the study area.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2016年第3期275-280,共6页
Xinjiang Petroleum Geology
基金
国家自然科学基金(41172105)
构造与油气资源教育部重点实验室开放课题(TPR-2015-13)
关键词
燕山地区
中元古界
碳酸盐岩
储集空间
控制因素
Yanshan area
Mesoproterozoic
carbonate rock
reservoir storage space
controlling factor
