大庆石油地质与开发

2017, v.36;No.179(01) 27-34

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渤中28-1油田奥陶系碳酸盐岩储层特征及主控因素
CHARACTERISTICS AND MAIN CONTROLLING FACTORS FOR THE ORDOVICIAN CARBONATE RESERVOIRS IN BOZHONG 28-1 OILFIELD

赵春明,张建民,李祖兵
ZHAO Chunming,ZHANG Jianmin,LI Zubing

摘要(Abstract):

为了高效开发渤中28-1油田,基于现有的钻井、岩心、岩屑、测井及分析化验资料,分析渤中28-1井区奥陶系碳酸盐岩储层的岩石类型、储集空间类型及物性特征,剖析储层发育的主控因素。研究表明:奥陶系碳酸盐岩主要为白云岩、灰岩、灰质白云岩、白云质灰岩及碎屑岩,以白云岩为主;储集空间主要为粒间孔,粒间溶孔、粒内溶孔、晶间孔、溶沟和裂缝,以裂缝为主;储层基质孔隙度和渗透率值均较低,但裂缝极大改善了渗透率;储层在发育过程中经历了海底成岩、大气淡水成岩、埋藏成岩及晚期表生成岩等成岩环境;沉积相带、成岩环境、白云化作用、溶蚀作用、构造作用等因素控制储层发育和空间分布。
In order to effectively develop Bozhong Oilfield,based on the current drilling,core,cutting,logging and analysis-test data,the rock types,reservoir space type,physical-property characteristics and main controlling development factors of Ordovician carbonate reservoirs were analyzed. The studies show that the rocks are generally composed of dolomite,limestone,dolomite lime,dolomitic limestone and clastic rocks,but the former is the main form; the reservoir space types mainly include the following forms:intergranular pore,intergranular dissolution pore,internal dissolution pore of the particle,intercrystal pore,dissolution channel and fracture,and moreover the latter plays the dominant role; the matrix porosity and permeability of the reservoir are rather lower,but the existence of the fractures greatly improves the permeability of the reservoir; the reservoirs in the development processhave experienced four diagenetic environments including submarine diagenetic,atmospheric-fresh-water diagenetic,buried diagenetic and supergenetic diagenetic environments in the late period; the sedimentary facies-belts,diagenetic environments,dolomitization,dissolution,tectonism and so on are control the reservoir development and spatial distribution.

关键词(KeyWords): 渤中28-1井区;奥陶系;裂缝;溶蚀作用;主控因素
Well Block Bozhong 28-1;Ordovician;fracture/crack;dissolution;major controlling factor

Abstract:

Keywords:

基金项目(Foundation): “十三五”国家科技重大专项“渤海油田高效开发示范工程”(2016ZX05058)

作者(Author): 赵春明,张建民,李祖兵
ZHAO Chunming,ZHANG Jianmin,LI Zubing

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