冀中坳陷Y9井区奥陶系潜山储层特征及控制因素  

RESERVOIR CHARACTERISTICS AND CONTROLLING FACTORS FOR ORDOVICIAN BURIED-HILL IN WELL BLOCK Y9 OF JIZHONG DEPRESSION

作　　者：薛辉 窦连彬 吕亚辉 郭朝志 肖博雅 彭志琴 

机构地区：[1]中国石油华北油田公司地球物理勘探研究院,河北任丘062552

出　　处：《大庆石油地质与开发》2017年第5期41-46,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份有限公司重大科技专项"华北油田上产稳产800万吨关键技术研究与应用"(2014E-35)

摘　　要：为明确Y9井区奥陶系潜山下一步勘探开发方向,利用岩心观察、薄片鉴定、物性数据分析等技术方法,结合测井、地震等解释成果,对冀中坳陷Y9井区奥陶系潜山储层特征及控制因素进行研究。结果表明:Y9井区奥陶系潜山储层岩性主要为灰岩,其次为白云岩,储层物性较差,储集空间以次生成因的晶间孔、粒间(内)溶孔为主,且发育构造缝、构造—溶蚀缝和溶洞,属低孔、低渗的裂缝—孔隙型、孔隙—裂缝型储层;储层发育受沉积、成岩、岩溶、构造等4个方面作用影响,灰云坪、云坪微相中储层最发育,白云石化、溶蚀作用大大改善了储层的最终物性,奥陶系潜山顶部和断层发育带附近岩溶作用发育,多形成优质储层,构造作用产生构造裂缝,改善了储层渗滤能力。In order to make certain of the further exploration and development of Ordovician buried-hill in Well Block Y9,by means of the cores observation,rock thin section identification,physical property analyses and so on,combined with the well logging and seismic interpretation results,the reservoir characteristics and controlling factors of this block were researched. The achievements show that the main reservoir lithologies are limestone,the dolomite rocks were less,the physical properties are rather poorer,the reservoir accumulating space is mainly the secondary interquartz pores,intragranular and intergranular dissolved pores,and moreover the structural fractures,structural-dissolved fractures and vugs are also developed,the reservoir types are shown as follows： low-porosity and low-permeability fracture-pore and pore-fracture ones; the controlling factors include the sedimentation,diagenesis,karstification and tectonization,the reservoir are mostly developed in the microfacieses of the limestone-dolo-mite flat and dolomite flat,the dolomitization and dissolution can greatly improve the last physical properties of the reservoirs,the karstifications are greatly developed in the upper of Ordovician buried-hill and around the fault belts,thus the high-quality reservoirs are always developed there,the tectonization can generate the structural fractures,so the communication and infiltration abilities of the reservoirs can be improved a great deal.

关 键 词：冀中坳陷 奥陶系 潜山 储层特征 控制因素 

分 类 号：TE122.2[石油与天然气工程—油气勘探]