塔里木盆地沙雅隆起奥陶系岩溶储层特征
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摘要
研究岩心观察、薄片鉴定、宏观地震断裂识别、微观裂缝测井解释,以及流体包裹体均一温度测温和埋藏史和孔隙度演化史.结果表明:沙雅隆起奥陶系岩溶类型从微观角度分为同生期岩溶、潜山岩溶(渗流期岩溶和潜流期岩溶)、浅埋藏岩溶及深埋藏岩溶.断裂对岩溶储层的发育起主导作用,主要体现在断裂为岩溶作用提供渗滤通道,同时断裂带是裂缝与岩溶发育的密集带.沙雅隆起加里东中期岩溶分为早幕和晚幕,晚幕岩溶表现为一期和二期,不同期次岩溶具有不同的特征.沙雅隆起下古生界顶部剥蚀面上下两段的镜质体反射率-埋藏深度关系直线之间存在明显错位的现象,说明早在石炭纪之前,沙雅隆起地区中下奥陶统有机质的演化程度已处于高成熟阶段.包裹体分析认为沙雅于奇地区奥陶系储层至少存在3次油气注入,依次为燕山晚期、喜山早期和喜山中期.受多期构造运动的影响,沙雅隆起奥陶系岩溶储层的成藏体系经历多期的建立-破坏-重建过程.
Through the analysis of systematic core observation,determination of thin section,indication faults in seismic scale,interpretation of fracture of micro-scale in logging,homogeneous temperature testing of fluid inclusions,and studying of burial history and porosity evolutional history,it can be inferred that the types of reservoir of Ordovician karst in Shaya uplift can be divided into five categories,which are contemporaneous karst,burial hill karst(seepage karst and groundwater flow karst),shallow burial karst,and deep burial karst respectively.Fault plays an important role in the development of karst reservoir,the functions of which are that the filtering pathways of karstification are provided by faults and faulting zones are also the condensed sections of fractures and karst.The middle Caledonian karsts of Shaya uplift can be divided into early and late stages,the latter of which can be subdivided into epoch one and epoch two characterized by different features.The fact that there is a obvious dislocation between the up and down sections in the erosional interface of vitrinite reflectance-burial depth cross plot line in the top of the Lower Palaeozoic strata indicates that the evolutional degree of Lower-Middle Ordovician organisms in Shaya uplift has already been in the ultra-maturation stage before Carboniferous Period.The Ordovician reservoir of Yuqi area is characterized by three hydrocarbon emplacement through the analysis of fluid inclusion,which are the late stage of Yenshan movement,early stage of Himalayan movement,and middletage of Himalayan movement respectively.The system of hydrocarbon accumulation of Ordovician karst reservoir in Shaya uplift has been subjected to multiple establishing,destroying,reconstruction processes due to influence from multiple tectonic movements,the models of hydrocarbon accumulation of the studying area can be classified into gentle slope accumulation model and high point accumulation model on the basis of the relative location of source rock and differentiation of hydrocarbon migration pathways.
Through the analysis of systematic core observation,determination of thin section,indication faults in seismic scale,interpretation of fracture of micro-scale in logging,homogeneous temperature testing of fluid inclusions,and studying of burial history and porosity evolutional history,it can be inferred that the types of reservoir of Ordovician karst in Shaya uplift can be divided into five categories,which are contemporaneous karst,burial hill karst(seepage karst and groundwater flow karst),shallow burial karst,and deep burial karst respectively.Fault plays an important role in the development of karst reservoir,the functions of which are that the filtering pathways of karstification are provided by faults and faulting zones are also the condensed sections of fractures and karst.The middle Caledonian karsts of Shaya uplift can be divided into early and late stages,the latter of which can be subdivided into epoch one and epoch two characterized by different features.The fact that there is a obvious dislocation between the up and down sections in the erosional interface of vitrinite reflectance-burial depth cross plot line in the top of the Lower Palaeozoic strata indicates that the evolutional degree of Lower-Middle Ordovician organisms in Shaya uplift has already been in the ultra-maturation stage before Carboniferous Period.The Ordovician reservoir of Yuqi area is characterized by three hydrocarbon emplacement through the analysis of fluid inclusion,which are the late stage of Yenshan movement,early stage of Himalayan movement,and middletage of Himalayan movement respectively.The system of hydrocarbon accumulation of Ordovician karst reservoir in Shaya uplift has been subjected to multiple establishing,destroying,reconstruction processes due to influence from multiple tectonic movements,the models of hydrocarbon accumulation of the studying area can be classified into gentle slope accumulation model and high point accumulation model on the basis of the relative location of source rock and differentiation of hydrocarbon migration pathways.
引文
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[4]王琪,史基安,陈国俊,等.塔里木盆地西部碳酸盐岩成岩环境特征及其对储层物性的控制作用[J].沉积学报,2001,19(4):548-555.
[5]林社卿,陈文礼,曹新焰,等.塔里木盆地早海西期两起重要的古岩溶事件[J].大庆石油学院学报,2004,28(2):21-24.
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[10]Ozkan H,Hasan S,Nohut M.Nature of a regional dogleg pattern in mature profiles from these basin,northwestern Turkey:Anewly discovered unconformity or a thermal anomaly[J].AAPG Bulletin,2005,89(10):1373-1396.
[11]Harris P M.Delineating and quantifying depositional facies patterns in carbonate reservoirs:insight from modern analogs[J].AAPGBulletin,2010,94(1):61-86.
[12]Georgia P P,Shawna W M.Early disgenesis of inner-shelf phoshorite and iron-silicate minerals,lower creataceous of the orpheusgraben,southeastern Canada:Implications for the origin of chlorite rims[J].AAPG Bulletin,2008,92(9):1153-1168.
[13]朱东亚,金之钧,胡文瑄,等.塔里木盆地深部流体对碳酸盐岩储层的影响[J].地质论评,2008,54(3):348-357.
[14]张仲培,王毅,云金表,等.塔里木盆地台盆区海西期地质事件及其油气成藏效应[J].大庆石油学院学报,2007,31(4):1-7.
[15]王俊明,肖建玲,周宗良,等.碳酸盐岩潜山储层垂向分带及油气藏流体分布规律[J].新疆地质,2003,21(2):210-213.
[16]周新源,吕修祥,金之钧,等.塔里木盆地构造活动枢纽部位碳酸盐岩油气聚集[J].西安石油大学学报:自然科学版,2004,19(4):19-23.
[17]Esteban M,Taberner C.Secondary porosity development during late burial in carbonate reservoirs as a result of mixing and/or cool-ing of brines[J].Journal of Geochemical Exploration,2003,78(3):355-359.
[18]Morad S,Khalid A R,Ketzer L F,et al.The impact of disgenesis on the heterogeneity of sandstone reservoirs:A review of the roleof depositional facies and sequence stratigraphy[J].AAPG Bulletin,2010,94(8):1267-1309.
[19]顾战宇,杨斌.塔河油田八区奥陶系碳酸盐岩缝洞储层测井识别研究[J].矿物岩石,2010,30(3):89-95.
[20]鲁新便,吴铭东,王静.塔河油田下奥陶统碳酸盐岩储层对比及储层剖面模型[J].新疆地质,2002,20(3):196-200.
[21]云露,蒋华山.塔里木盆地北部沙雅隆起含油气系统及勘探靶区选择[J].石油实验地质,2002,24(6):507-511.
[22]阎相宾.塔河油田奥陶系碳酸盐岩储层特征[J].石油与天然气地质,2002,23(3):262-265.
[2]李忠,黄锶静,刘嘉庆,等.塔里木盆地塔河奥陶系碳酸盐岩储层埋藏成岩和构造-热流体作用及其有效性[J].沉积学报,2010,28(5):969-977.
[3]胡金祥,单玄龙,李宗杰,等.沙西凸起东北部斜坡带成藏条件与成藏模式[J].特种油气藏,2008,15(3):20-25.
[4]王琪,史基安,陈国俊,等.塔里木盆地西部碳酸盐岩成岩环境特征及其对储层物性的控制作用[J].沉积学报,2001,19(4):548-555.
[5]林社卿,陈文礼,曹新焰,等.塔里木盆地早海西期两起重要的古岩溶事件[J].大庆石油学院学报,2004,28(2):21-24.
[6]蔡春芳,梅博文,马停,等.塔里木盆地流体-岩石相互作用研究[M].北京:地质出版社,1997:4-55.
[7]蔡春芳,梅博文,马停,等.塔里木盆地不整合面附近成岩改造体系烃-水-岩相互作用[J].科学通报,1995,40(24):2253-2256.
[8]Robert G L.Paleocave carbonate reservoirs:origins,burial-depth modifications,spatial complexity,and reservoir implications[J].AAPG,1999,83(11):1795-1831.
[9]蒋炳南,康玉柱.新疆塔里木盆地油气分布规律及勘探靶区评价研究[M].乌鲁木齐:新疆科技卫生出版社,2001:1-60.
[10]Ozkan H,Hasan S,Nohut M.Nature of a regional dogleg pattern in mature profiles from these basin,northwestern Turkey:Anewly discovered unconformity or a thermal anomaly[J].AAPG Bulletin,2005,89(10):1373-1396.
[11]Harris P M.Delineating and quantifying depositional facies patterns in carbonate reservoirs:insight from modern analogs[J].AAPGBulletin,2010,94(1):61-86.
[12]Georgia P P,Shawna W M.Early disgenesis of inner-shelf phoshorite and iron-silicate minerals,lower creataceous of the orpheusgraben,southeastern Canada:Implications for the origin of chlorite rims[J].AAPG Bulletin,2008,92(9):1153-1168.
[13]朱东亚,金之钧,胡文瑄,等.塔里木盆地深部流体对碳酸盐岩储层的影响[J].地质论评,2008,54(3):348-357.
[14]张仲培,王毅,云金表,等.塔里木盆地台盆区海西期地质事件及其油气成藏效应[J].大庆石油学院学报,2007,31(4):1-7.
[15]王俊明,肖建玲,周宗良,等.碳酸盐岩潜山储层垂向分带及油气藏流体分布规律[J].新疆地质,2003,21(2):210-213.
[16]周新源,吕修祥,金之钧,等.塔里木盆地构造活动枢纽部位碳酸盐岩油气聚集[J].西安石油大学学报:自然科学版,2004,19(4):19-23.
[17]Esteban M,Taberner C.Secondary porosity development during late burial in carbonate reservoirs as a result of mixing and/or cool-ing of brines[J].Journal of Geochemical Exploration,2003,78(3):355-359.
[18]Morad S,Khalid A R,Ketzer L F,et al.The impact of disgenesis on the heterogeneity of sandstone reservoirs:A review of the roleof depositional facies and sequence stratigraphy[J].AAPG Bulletin,2010,94(8):1267-1309.
[19]顾战宇,杨斌.塔河油田八区奥陶系碳酸盐岩缝洞储层测井识别研究[J].矿物岩石,2010,30(3):89-95.
[20]鲁新便,吴铭东,王静.塔河油田下奥陶统碳酸盐岩储层对比及储层剖面模型[J].新疆地质,2002,20(3):196-200.
[21]云露,蒋华山.塔里木盆地北部沙雅隆起含油气系统及勘探靶区选择[J].石油实验地质,2002,24(6):507-511.
[22]阎相宾.塔河油田奥陶系碳酸盐岩储层特征[J].石油与天然气地质,2002,23(3):262-265.
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