塔河9区奥陶系储层特征与控制因素分析
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摘要
通过对塔河油田9区多口井的钻井、测井、地震等资料的系统分析,结合岩心观察,薄片鉴定及地球化学分析研究,认为塔河9区奥陶系凝析气藏的产气层主要为一间房组,部分为鹰山组,岩石以泥晶灰岩为主,颗粒灰岩次之。储层基质物性较差,储集空间类型主要为溶洞、裂缝,孔隙型发育较少,储集层类型为裂缝-孔洞型、溶洞型及裂缝型3种。储集层的发育受控于局部构造、断裂和裂缝及岩溶作用。岩溶作用对储层的发育至关重要,构造高部位岩溶作用较强烈,储层较发育;平面上,断裂和裂缝系统为多期岩溶作用提供渗流通道,有利储集体主要沿断裂及断裂相切部位呈片状展布;纵向上有利储层主要位于奥陶系一间房组顶面以下0~60 m的砂屑灰岩段,受到正常潜水面的大气水岩溶作用控制。
Through systematic drilling,well logging,seismic data analysis of 9-area in Tahe oilfield,combined with core observation,thin section identification and geochemical analysis,the gas-bearing layers of ordovician condensate gas reservoir of 9-area in Tahe oilfield is mainly from Yijianfang formation,part from Yingshan formation,with mainly micrite and secondly grain limestone.The physical property of reservoir matrix is poor and the main reservoir space types are mainly caves and cracks,the pore-types are less,and there are three reservoir types,namely crack-hole type,cavity type and crack type.The reservoir development is controlled by local structure,faulting,fracture and karstification.Karstification is essential to the reservoir development,and the karstification in structural high position is strong,with developed reservoirs.On the plane,the fracture and fracture systems can provide seepage channels for karstification,the favorable reservoir body presents plate shaped distribution along the fracture and the tangent place of the fracture.Vertically the favorable reservoirs are mainly located in calcarenite section 0~60 m below ordovician Yijianfang formation,and under atmospheric water karstification control of normal phreatic surface.
Through systematic drilling,well logging,seismic data analysis of 9-area in Tahe oilfield,combined with core observation,thin section identification and geochemical analysis,the gas-bearing layers of ordovician condensate gas reservoir of 9-area in Tahe oilfield is mainly from Yijianfang formation,part from Yingshan formation,with mainly micrite and secondly grain limestone.The physical property of reservoir matrix is poor and the main reservoir space types are mainly caves and cracks,the pore-types are less,and there are three reservoir types,namely crack-hole type,cavity type and crack type.The reservoir development is controlled by local structure,faulting,fracture and karstification.Karstification is essential to the reservoir development,and the karstification in structural high position is strong,with developed reservoirs.On the plane,the fracture and fracture systems can provide seepage channels for karstification,the favorable reservoir body presents plate shaped distribution along the fracture and the tangent place of the fracture.Vertically the favorable reservoirs are mainly located in calcarenite section 0~60 m below ordovician Yijianfang formation,and under atmospheric water karstification control of normal phreatic surface.
引文
[1]艾克拜尔·沙迪克,吕媛娥,吕海涛.塔河油田盐体覆盖区奥陶系储层发育特征及主控因素研究[J].新疆地质,2005,23(4):396-400.
[2]杨宁,吕修祥,陈梅涛,等.塔里木盆地轮南、塔河油田碳酸盐岩储层特征研究:以沙107井和轮古40井为例[J].石油实验地质,2008,30(3):247-251.
[3]叶德胜,王根长,林忠民,等.塔里木盆地北部寒武系-奥陶系碳酸盐岩储层特征及油气前景[M].四川成都:四川大学出版社,2000:88-102.
[4]段艳秋.塔河油田托甫台区奥陶系碳酸盐岩储集体地质特征研究[J].石油地质与工程,2011,25(5):13-17.
[5]俞仁连,傅恒.构造运动对塔河油田奥陶系碳酸盐岩的影响[J].天然气勘探与开发,2006,29(2):1-5.
[6]李振宏,贾建恒,冯武军,等.断裂和不整合面对古岩溶的控制作用[J].海相油气地质,2003,8(1-2):87-91.
[2]杨宁,吕修祥,陈梅涛,等.塔里木盆地轮南、塔河油田碳酸盐岩储层特征研究:以沙107井和轮古40井为例[J].石油实验地质,2008,30(3):247-251.
[3]叶德胜,王根长,林忠民,等.塔里木盆地北部寒武系-奥陶系碳酸盐岩储层特征及油气前景[M].四川成都:四川大学出版社,2000:88-102.
[4]段艳秋.塔河油田托甫台区奥陶系碳酸盐岩储集体地质特征研究[J].石油地质与工程,2011,25(5):13-17.
[5]俞仁连,傅恒.构造运动对塔河油田奥陶系碳酸盐岩的影响[J].天然气勘探与开发,2006,29(2):1-5.
[6]李振宏,贾建恒,冯武军,等.断裂和不整合面对古岩溶的控制作用[J].海相油气地质,2003,8(1-2):87-91.
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