准噶尔盆地沙帐断褶带二叠系云质岩储层特征及成因分析  

Characteristics and Formation Mechanism for Dolomite Reservoir of Permian PingDiQuan Formation of ShaZhang Fault-fold Belts in Junggar Basin

作　　者：黄芸[1] 梁舒艺 李艳平[1] 赵进雍[1] 

机构地区：[1]中国石油新疆油田公司勘探开发研究院,新疆乌鲁木齐830013 [2]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《新疆地质》2016年第2期224-229,共6页Xinjiang Geology

摘　　要：云质岩储集层在准噶尔盆地为一套成因特殊、富含油气的储集层,属致密油勘探。以准噶尔盆地卡拉麦里山前凹陷沙帐断褶带二叠系平地泉组一段云质岩储层为研究对象,通过对岩石学、成岩作用、储集空间类型、粘土矿物二次鉴定及成因机理分析指出:沙帐断褶带云质岩按产状分为纹层状、均匀分布状、不规则层状、团块状和裂缝充填5种类型;白云岩化岩流体中镁离子主要来自火山玻璃脱玻化;大规模白云岩化母岩为凝灰岩、沉凝灰岩;邻区火山活动及后期火山凝灰质蚀变和成岩交代为云质岩储层形成的主要原因。HB2井在二叠系平地泉组一段云质岩中经酸化压裂获得工业油流,改写了长期以来"平一段只有烃源岩发育层段"的认识,证实沙帐断褶带发育有云质岩储层源储一体的致密油藏类型。Dolomitic rock reservoir is a special origin and rich-hydrocarbon formation in Junggar Basin,which belongsto tight oil.Existing results all focus on Permian Fencheng formation located in northwest margin,and LuCaoGou formationlocated in eastern margin,it is studied little that the Permian PingDiQuan formatin of ShaZhang fault-fold belts innortheastern margin.Attributed by lithology,reservoir space and formation mechanism, the dolomitic rock of the PingDi-Quan Formation is divided into 5 types lamina dolomitic rock,uniform distribution,irregular thin-bed,clumps and crackfilling.Mg2＋ is mainly supplied from volcanic glass devitrification.The original rocks of the dolomitic rock are volcanic material （tuff）,sedimentary tuff.The main formation mechanism isthe procedure of Volcanic glass in the volcanic tuff material easily to take hydrolysis alteration.That well-HB2 obtainingIndustrial oil flow by acid fracturing demonstrated that tight oil of source-reservoir-integration exist in dolomitic rock ofthe PingDiQuan Formation,ShaZhang fault-fold belts in Junggar Basin.

关 键 词：准噶尔盆地 平地泉组 云质岩 凝灰岩 储层特征 成因机理 

分 类 号：P618.13[天文地球—矿床学]