塔东英东区块寒武系白云岩储层特征

Characteristics of Cambrian dolomite reservoir in Yingdong area of the east of Tarim basin

在现有罗西1、米兰1、英东1和英东2等探井的钻井、岩芯、录井、薄片和测井资料的基础上,利用岩芯观察、岩屑观察、薄片鉴定和测井资料处理分析等技术手段,对英东区块寒武系白云岩储层特征进行研究。英东地区寒武系白云岩储层储集空间类型以次生孔隙占绝对优势,以晶间孔、晶间溶孔和溶蚀孔洞为主,其次是裂缝空间。根据储层的主要储集空间的不同,将其归纳为溶蚀孔隙型和溶蚀缝孔洞型两类储层,区内寒武系白云岩溶蚀缝孔洞型为Ⅳ-Ⅱ类储层,溶蚀孔隙型为Ⅳ-Ⅲ类储层,主要集中发育在上寒武统突尔沙克塔格组。

Base on the drilling,drill core,geological logging,thin section and well logging data of Luoxi 1 well,Milan 1 well,Yingdong 1 well and Yingdong 2 well,the basic characteristics and diagenesises of the Cambrian dolomite reservoir are studied through core observation, thin section analysis and well logging data analysis.In the yingdong area,the main reservoir space types of the Cambrian dolomite reservoir.Secondary porosities,such as intercrystalline pore,intracrystalline solution pore,solution pore or cave,and unfilled crack.Depending on the difference of main reservoir space,solution crack-pore-cave reservoir and solution porereservoir were proposed.The Cambrian dolomite solution crack-pore-cave reservoir is Ⅳ-Ⅱtype reservoir, the dolomite solution pore reservoir is Ⅳ-Ⅲ type reservoir,it main distribution in the upper Cambrian series.