中拐凸起石炭系火山岩油藏特征及成藏模式新认识
|
摘要
针对中拐凸起石炭系南、北油藏高度差异大,试油普遍见水,油水关系复杂,油水过渡带大,油藏类型及主控因素认识不清的现状,对其构造特征、断裂组合关系、储盖组合特征及地层水特征等控藏因素进行了分析。研究认为:中拐凸起石炭系发育两类油藏,古隆主体地震反射杂乱,为受构造、断裂控制的块状油藏,周缘围斜区为层状反射特征,油藏为受不整合面或岩性遮挡的层状油藏。南部古隆形态完整,保存条件好,油藏高度大;北部地层剥蚀严重,古隆更高,分布范围缩小,充注程度不足,油藏高度不大;发育两级断裂,一级走滑断裂疏通油源,二级断裂控制油藏展布特征。南部主要发育火山角砾岩,储层物性好,有利于油气的聚集;北部则以火山熔岩为主,储层物性较南部略差;且南部盖层条件优于北部,对下伏石炭系油藏起到更好的封盖作用。研究区地层水为氯化钙水型,南部热液改造作用不明显,矿化度较低;北部沿断裂热液改造作用明显,矿化度较高;古隆主体热液改造作用弱,矿化度较周缘围斜区低。
The height of the reservoir is different between the south and north in Carboniferous of Zhongguai uplift.Water is commonly seen in oil test,oil-water relationship is complex,transitional zone of oil-water is large,reservoir type and main control factors are not clear.Based on the analysis of reservoir-cap rock association and formation water characteristics of Carboniferous,it is believed that zhongguai uplft developped two types of reservoir:massive reservoir and layered reservior.The form of southern Paleouplift is integral,preserve condition is good,reservoir height is large,the erosion of northern strata is serious,and the distribution range is reduced,filling degree is insufficient.There are two stages of faults:strike-slip fault unchoke oil,the second-order fault controls the distribution features of reservoir.The soutern part maily develop volcanic breccia,in favor of hydrocarbon accumulation,the northern part is mainly volcanic lava,the reservoir property is slightly worse than that in the south,the conditions of caprock in the south are better than those in the north.The formation water in the study area is of calcium chloride type,Hydrothermal transformation is not obvious in the south,Hydrothermal transformation is weak in paleouplift,the salinity is lower than that of the peripheral periclinal area.
The height of the reservoir is different between the south and north in Carboniferous of Zhongguai uplift.Water is commonly seen in oil test,oil-water relationship is complex,transitional zone of oil-water is large,reservoir type and main control factors are not clear.Based on the analysis of reservoir-cap rock association and formation water characteristics of Carboniferous,it is believed that zhongguai uplft developped two types of reservoir:massive reservoir and layered reservior.The form of southern Paleouplift is integral,preserve condition is good,reservoir height is large,the erosion of northern strata is serious,and the distribution range is reduced,filling degree is insufficient.There are two stages of faults:strike-slip fault unchoke oil,the second-order fault controls the distribution features of reservoir.The soutern part maily develop volcanic breccia,in favor of hydrocarbon accumulation,the northern part is mainly volcanic lava,the reservoir property is slightly worse than that in the south,the conditions of caprock in the south are better than those in the north.The formation water in the study area is of calcium chloride type,Hydrothermal transformation is not obvious in the south,Hydrothermal transformation is weak in paleouplift,the salinity is lower than that of the peripheral periclinal area.
引文
[1]王惠民,吴华,靳涛,等.准噶尔盆地西北缘油气富集规律[J].新疆地质,2005,23(3):278-282.
[2]况军.准噶尔盆地古隆起与油气勘探方向[J].新疆石油地质,2005,26(5):502-509.
[3]何登发,张义杰,王绪龙,等.准噶尔盆地大油气田的勘探方向[J].新疆石油地质,2004,25(2):117-124.
[4]邵雨,汪仁富,张越迁,等.准噶尔盆地西北缘走滑构造与油气勘探[J].石油学报,2011,32(6):976-984.
[5]周坤,秦启荣,梁则亮,等.准噶尔西北缘中拐凸起石炭系油气地质特征及勘探潜力[J].科学技术与工程,2013,13(32):9655-9661.
[6]姚卫江,范存辉,党玉芳,等.准噶尔盆地西北缘中拐凸起石炭系火山岩储层特征及主控因素[J].石油天然气学报,2011,9(33):32-36.
[7]李梅,金爱民,楼章华,等.准噶尔盆地地层流体特征与油气运聚成藏[J].石油与天然气地质,2012,33(4):607-615.
[8]任国选,侯读杰,史玉玲,等.准噶尔盆地西北缘红山嘴油田地层水特征与油气藏聚集关系[J].石油与天然气地质,2013,34(2):179-184.
[9]陈小蓉.准噶尔盆地中拐地区地层水特征与油气藏的关系[D].新疆大学,2011:28-29.
[10]查明,张一伟,邱楠生.油气成藏条件及主要控制因素[M].北京:石油工业出版社,2003:152-164.
[11]周霞,李海涛.断裂系统与油气成藏关系研究--以准噶尔盆地车排子地区沙湾组为例[J].石油物探,2011,50(4):417-424.89
[2]况军.准噶尔盆地古隆起与油气勘探方向[J].新疆石油地质,2005,26(5):502-509.
[3]何登发,张义杰,王绪龙,等.准噶尔盆地大油气田的勘探方向[J].新疆石油地质,2004,25(2):117-124.
[4]邵雨,汪仁富,张越迁,等.准噶尔盆地西北缘走滑构造与油气勘探[J].石油学报,2011,32(6):976-984.
[5]周坤,秦启荣,梁则亮,等.准噶尔西北缘中拐凸起石炭系油气地质特征及勘探潜力[J].科学技术与工程,2013,13(32):9655-9661.
[6]姚卫江,范存辉,党玉芳,等.准噶尔盆地西北缘中拐凸起石炭系火山岩储层特征及主控因素[J].石油天然气学报,2011,9(33):32-36.
[7]李梅,金爱民,楼章华,等.准噶尔盆地地层流体特征与油气运聚成藏[J].石油与天然气地质,2012,33(4):607-615.
[8]任国选,侯读杰,史玉玲,等.准噶尔盆地西北缘红山嘴油田地层水特征与油气藏聚集关系[J].石油与天然气地质,2013,34(2):179-184.
[9]陈小蓉.准噶尔盆地中拐地区地层水特征与油气藏的关系[D].新疆大学,2011:28-29.
[10]查明,张一伟,邱楠生.油气成藏条件及主要控制因素[M].北京:石油工业出版社,2003:152-164.
[11]周霞,李海涛.断裂系统与油气成藏关系研究--以准噶尔盆地车排子地区沙湾组为例[J].石油物探,2011,50(4):417-424.89