长岭地区东北部拗陷层油气成藏特征及储层预测
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摘要
本文从长岭凹陷隐蔽油气藏勘探实际出发,以分析该区的油气地质条件、控砂主导因素及油气成藏规律为主线,利用钻井、地震等资料通过地震属性分析、测井约束反演等方法对该区进行了储层预测,寻找有利的储层分布范围,研究砂体在空间展布特征,掌握砂体与断层的配置关系、砂体的尖灭情况,进而识别不同类型隐蔽型圈闭.指出该区隐蔽油气藏主要有三种成藏类型,即构造-岩性复合型、砂岩上倾尖灭型、砂岩透镜体型.远物源缓坡河流-三角洲沉积体系控制该区砂体分布,使得油气富集成藏规律主要表现为多层位含油,各个砂组交互发育;单个油藏面积小,在平面上具有多套砂体形成迭合连片的特征.主要目的层,如青一、二段砂体,以三角洲前缘分支河道发育为主,河道走向北东向.研究区内的断层走向近南东—北西向,与砂体走向垂直.这种断层与砂体配置关系,易形成构造-岩性复合圈闭.
As the south part of Songliao Basin,Changlin depression have abundant resource of oil and gas.At present,Changlin depression have already been developed.The depression have many layers of oil and gas accumulation,which have many different types of accumulations.It is those good geological conditions that was favourable to development of complex accumulation of oil and gas.This paper will report the development regularity of oil and gas accumulation in Changlin Depression,and analyze log and seismic data by seismic attribution and log-restrict inversion to forcast reservoir in the depression,in order to find distribution characteristic of advantageous reservoir and sandstone bodies,and to understand the relationship between sandstone body and faults,vanished character of sandstone body and identify the closure of lithological character.The results show that,characteristic of oil and gas accumulation mainly have three types of closure,such as complex strcuture-lithological closure,upper-dip tail-out closure of sandstone body and len closure of sandstone body.The development regularity of oil and gas accumulation mainly is multi-layer of oil and gas and mutual effect of those sandstone groups.And,single accumulation have too small area,but widely distributed as sheet in the horizontal plane.Multi-sandstone-body in the accumulation have vertical connexity.The main objective-layer,such as sandstone layers in Qing-I and Qing-II formation,have main characteristic of delta front watercourse,which is north-eastern trend.And,faults in this area have nearly south-eastern to north-western strike,which is perpendicular to those sandstone bodies.Those relationship easily result in the development of the complex closure of structure-lithology.
As the south part of Songliao Basin,Changlin depression have abundant resource of oil and gas.At present,Changlin depression have already been developed.The depression have many layers of oil and gas accumulation,which have many different types of accumulations.It is those good geological conditions that was favourable to development of complex accumulation of oil and gas.This paper will report the development regularity of oil and gas accumulation in Changlin Depression,and analyze log and seismic data by seismic attribution and log-restrict inversion to forcast reservoir in the depression,in order to find distribution characteristic of advantageous reservoir and sandstone bodies,and to understand the relationship between sandstone body and faults,vanished character of sandstone body and identify the closure of lithological character.The results show that,characteristic of oil and gas accumulation mainly have three types of closure,such as complex strcuture-lithological closure,upper-dip tail-out closure of sandstone body and len closure of sandstone body.The development regularity of oil and gas accumulation mainly is multi-layer of oil and gas and mutual effect of those sandstone groups.And,single accumulation have too small area,but widely distributed as sheet in the horizontal plane.Multi-sandstone-body in the accumulation have vertical connexity.The main objective-layer,such as sandstone layers in Qing-I and Qing-II formation,have main characteristic of delta front watercourse,which is north-eastern trend.And,faults in this area have nearly south-eastern to north-western strike,which is perpendicular to those sandstone bodies.Those relationship easily result in the development of the complex closure of structure-lithology.
引文
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[10]刘震,赵政璋,赵阳,等.含油气盆地岩性油气藏的形成和分布特征[J].石油学报,2006,27(1):17~23.LIU Zhen,ZHAO Zheng-zhang,ZHAO Yang etc.,Predom-inant characteristics of formation and distribution for lithologicreservoirs in petroliferous basin[J].Acta Petrolei Sinica,2006,27(1):17~23.
[11]程裕淇.中国区域地质概论[M].北京:地质出版社,1994,461~465.CHENG Yu-qi,Conspectus of Chinese regional geology[M].Beijing:Geological Publishing House,1994.461~465.
[12]刘宝柱,魏志平,唐振兴.大情字井地区低孔、低渗型岩性油藏成因探讨[J].特种油气藏,2004,11(1):24~27.LIU Bao-zhu,WEI Zhi-ping,TANG Zhen-xing.Genesisstudy of low porosity,low permeability,lithologic resrvoirs inDaqingzijing area[J].Special oil and gas reservoirs,2004,11(1):24~27.
[13]王西文,刘全新,吕焕通,等.储集层预测技术在岩性油气藏勘探开发中的应用[J].石油勘探与开发,2006,33(2):189~193.WANG Xi-wen,LIU Quan-xin,LU Huan-tong,etc,Appli-cation of reservoir prediction technique in the exploration anddevelopment of lithologic oil-gas reservoirs[J].Petroleum ex-ploration and development,2006,33(2):189~193.
[14]蔡先华,谭胜章.松辽盆地南部长岭断陷火成岩分布及成藏规律[J].石油物探,2002,41(3):363~366.CAI Xian-hua and TAN Sheng-zhang.Pattern of igneous rockdistribution and hydrocarbon accumulation in changling faultdepression of the south part of Songliao Basin[J].Geophysi-cal Prospecting for petroleum,2002,41(3):363~366.
[2]牛嘉玉,李秋芬,鲁卫华,等.关于“隐蔽油气藏”概念的若干思考[J].石油学报,2005,26(2):122~126.Niu J Y,Li Q F,Lu W H,et al.Discussion on propositionand definition of subtle oil-gas reservoir[J].Acta Petrolei Sini-ca,2005,26(2):122~126.
[3]李建忠,杨涛,王立武,等.松辽南部大情字井地区断裂构造特征及其控油作用.石油勘探与开发,2004,31(1):18~20.Li J Z,Yang T,Wang L W,et al.The fault structure and itscontrolling role to hydrocarbon accumulation in Daqingzijing ar-ea,Southern Songliao Basin[J].Petroleum exploration and de-velopment,2004,31(1):18~20.
[4]杨立英,李瑞磊,张江涛,等.松辽盆地南部十屋断陷构造特征研究[J].地球物理学进展,2005,20(3):775~779.Yang L Y,Li R L,Zhang J T,et al.Study of structure char-acter with seismic data in Shiwu Fault Depression in south ofSongliao basin[J].Progress in Geophysics(in Chinese),2005,20(3):775~779.
[5]李明侯连华邹才能,等.岩性地层油气藏地球物理勘探技术与应用[M].北京:石油工业出版社.2005.LI Ming,HOU Lian-hua,ZOU Cai-neng et al.,Geophysicalprocpect technique of Lithological-formation acummulation ofoil-gas and application[M].Beijing,Petroleum IndustryPress,2005.
[6]王锡文,秦广胜,刘向东,等.叠前偏移技术在中原复杂断块区的应用[J].地球物理学进展,2005,20(4):1092~1098.Wang X W,Qin G S,Liu X D,et al.The application of pre-stack migration technique in complex Fault-blocks ofZhongyuan oilfield[J].Progress in Geophysics(in Chinese),2005,20(4):1092~1098.
[7]樊卫花,杨长春,孙传文,刘文卿.三维地震资料叠前时间偏移应用研究[J].地球物理学进展,2007,22(3):836~842.Fan W H,Yang C C,Sun C W,Liu W Q.Application of pres-tack time migration for three dimensional seismic data[J].Pro-gress in Geophysics(in Chinese),2007,22(3):836~842.
[8]苑书金.叠前地震反演技术的进展及其在岩性油气藏勘探中的应用[J].地球物理学进展,2007,22(3):879~868.Yuan S J.Progress of pre-stack inversion and application inexploration of the lithological reservoirs[J].Progress in Geo-physics(in Chinese),2007,22(3):879~886.
[9]胡艳飞,于平,孔庆莹等,松辽盆地北安地区断陷期构造特征的地震学证据及其油气意义[J].地球物理学进展,2007,22(5):1455~1459.Hu Y F,Yu P,Kong Q Y,Wang S Y.Seismic evidence of faul-ted tectonic features and it's petroleum significance in area ofBeian of Songliao Basin[J].Progress in Geophysics(in Chi-nese),2007,22(5):1455~1459.
[10]刘震,赵政璋,赵阳,等.含油气盆地岩性油气藏的形成和分布特征[J].石油学报,2006,27(1):17~23.LIU Zhen,ZHAO Zheng-zhang,ZHAO Yang etc.,Predom-inant characteristics of formation and distribution for lithologicreservoirs in petroliferous basin[J].Acta Petrolei Sinica,2006,27(1):17~23.
[11]程裕淇.中国区域地质概论[M].北京:地质出版社,1994,461~465.CHENG Yu-qi,Conspectus of Chinese regional geology[M].Beijing:Geological Publishing House,1994.461~465.
[12]刘宝柱,魏志平,唐振兴.大情字井地区低孔、低渗型岩性油藏成因探讨[J].特种油气藏,2004,11(1):24~27.LIU Bao-zhu,WEI Zhi-ping,TANG Zhen-xing.Genesisstudy of low porosity,low permeability,lithologic resrvoirs inDaqingzijing area[J].Special oil and gas reservoirs,2004,11(1):24~27.
[13]王西文,刘全新,吕焕通,等.储集层预测技术在岩性油气藏勘探开发中的应用[J].石油勘探与开发,2006,33(2):189~193.WANG Xi-wen,LIU Quan-xin,LU Huan-tong,etc,Appli-cation of reservoir prediction technique in the exploration anddevelopment of lithologic oil-gas reservoirs[J].Petroleum ex-ploration and development,2006,33(2):189~193.
[14]蔡先华,谭胜章.松辽盆地南部长岭断陷火成岩分布及成藏规律[J].石油物探,2002,41(3):363~366.CAI Xian-hua and TAN Sheng-zhang.Pattern of igneous rockdistribution and hydrocarbon accumulation in changling faultdepression of the south part of Songliao Basin[J].Geophysi-cal Prospecting for petroleum,2002,41(3):363~366.
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