塔中西部鹰山组岩溶储层类型及识别方法

Types and Identification Methods of Karst Reservoirs in Yingshan Formation in Western Tarim Basin

为分析塔里木盆地塔中西部奥陶系鹰山组岩溶储层类型,通过岩心、电镜薄片、野外露头和成像测井等资料,在镜下薄片观察识别出了晶间孔、粒间孔、粒内溶孔、微裂缝等储集类型,在岩心和野外发现了构造裂缝、缝合线、溶洞、针状和层状溶孔等触及类型。通过成像测井结合岩心解释出了四类基本储层,分别是裂缝型、裂缝-孔洞型、孔洞型以及溶孔型。综合利用野外露头、岩心、成像测井和和钻井过程响应,能有效识别岩溶缝洞发育特征。

In order to analyze the types of karst reservoirs in Yingshan formation of Ordovician in central and Western Tarim basin,the reservoir types such as intergranular pore,intergranular pore,intragranular solution pore and micro-fracture were identified by means of core,electron microscopic slice,outcrop and imaging logging data.Structural fracture,suture line and micro-fracture,karst caves,needle-like and layered karst caves were found in core and field.Four types of basic reservoirs were interpreted by imaging logging combined with core,including fracture type,fracture-hole type,hole type and dissolution pore type.Combining field outcrop,core,imaging logging and drilling process response,karst fracture and cave development characteristics can be effectively identified.