CAJ | 학술논문

明确致密储层微观孔隙结构特征，对致密气藏有效开发有着重要的现实意义。通过应用扫描电镜、铸体薄片、高压压汞等实验技术，对长岭登娄库组气藏4口取心井76块样品开展化验分析，明确了其储层微观结构特征。研究表明，长岭气田登娄库组气藏储层成岩作用强，孔隙类型以粒间溶孔和粒内溶孔为主；孔隙度主要分布在0.3～10.4％，渗透率主要分布在0.0025～10.5mD；孔喉细小，孔喉半径基本都在1μm以下，根据压汞曲线形态将储层划分为4类，其中Ⅰ、Ⅱ类储层含气性较好。喉道细小且连通性差是导致储层致密的主要原因。
명학치밀저층미관공극결구특정，대치밀기장유효개발유착중요적현실의의。통과응용소묘전경、주체박편、고압압홍등실험기술，대장령등루고조기장4구취심정76괴양품개전화험분석，명학료기저층미관결구특정。연구표명，장령기전등루고조기장저층성암작용강，공극류형이립간용공화립내용공위주；공극도주요분포재0.3～10.4％，삼투솔주요분포재0.0025～10.5mD；공후세소，공후반경기본도재1μm이하，근거압홍곡선형태장저층화분위4류，기중Ⅰ、Ⅱ류저층함기성교호。후도세소차련통성차시도치저층치밀적주요원인。
It is important to conform the structure characteristics of the microscopic pore structure of reservoir for development of tight gas reservoir. The 76 pieces of samples were taken from four coring wells in the gas reservoir of Denglouku Formation in Changling for testing and analyzing by means of scanning electro-microscope, casing body slice and high pressure Hg injection technologies. The research in this paper shows that the gas reservoir of Denglouku Formation has the characteristics of strong diagenesis;the type of the pores are mainly inter-particle and intra-granular dissolved ones. The permeability are mainly in the range of 0.0025-10.5mD. the radius of the pore throats are below 1μm. The reservoirs are classified in four groups by mercury injection curve in which group I and II ones are good at gas bearing. The main reasons that results in tight revoir are narrow throat and poor connection.