贝尔凹陷贝西斜坡南屯组层序特征及其油气成藏模式研究
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摘要
运用层序地层学指导油气藏勘探,是目前油气勘探的热门课题和重要的发展方向之一。以层序地层学理论为指导,综合运用地震、测井、岩心等资料,采用井—震对比综合分析,波阻抗反演来验证的方法,在贝尔凹陷贝西斜坡南屯组中共识别出2个主要由扇三角洲—湖泊体系组成的三级层序:层序Ⅰ相当于南一段,层序Ⅱ相当于南二段。每个层序发育完整,分别由低水位体系域、水进体系域和高水位体系域组成。针对研究区目的层段所划分层序发育的特点,在层序地层单元划分和对比基础上,对不同类型层序格架内的沉积特征和层序地层模式进行了总结,并建立了相应的油气成藏模式。
Reservoir prediction based on sequence stratigraphy is one of popular and significant research subjects in hydrocarbon exploration. Based on the theory of sequence stratigraphy,comprehensively used the seismic,well logging,core and materials,comprehensively analyzed by well-seismic correlation,and verified by acoustic impedance,two third-order sequences which are mainly composed of fan delta-lacustrine sedimentary system can be identified in Nantun group of Beier depression:sequence Ⅰequal to K1n1,sequence Ⅱ equal to K1n2. Every sequence develops well and all consist of lowstand system tracts (LST),transgressive system tracts(TST) and highstand system tracts (HST). According to the development characteristics of sequence in the formation in the region of interest,based on the identification and correlation of sequence stratigraphic units,characteristics of sediment and sequence stratigraphic model of different sequence framework are summarized,and the hydrocarbon accumulation model is established.
Reservoir prediction based on sequence stratigraphy is one of popular and significant research subjects in hydrocarbon exploration. Based on the theory of sequence stratigraphy,comprehensively used the seismic,well logging,core and materials,comprehensively analyzed by well-seismic correlation,and verified by acoustic impedance,two third-order sequences which are mainly composed of fan delta-lacustrine sedimentary system can be identified in Nantun group of Beier depression:sequence Ⅰequal to K1n1,sequence Ⅱ equal to K1n2. Every sequence develops well and all consist of lowstand system tracts (LST),transgressive system tracts(TST) and highstand system tracts (HST). According to the development characteristics of sequence in the formation in the region of interest,based on the identification and correlation of sequence stratigraphic units,characteristics of sediment and sequence stratigraphic model of different sequence framework are summarized,and the hydrocarbon accumulation model is established.
引文
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8郝石生,贺志勇,高耀武,等.恢复地层剥蚀厚度的最优化方法[J].沉积学报,1988,6(4):93-99[Hao Shisheng,He Zhiwu,Gao Yaowu,et al.The optimal method for estimating the removed thickness of sedi-ment using homogenization temperature of fluid inclusions[J].Acta Sedimentologica Sinica,1988,6(4):93-99]
9孙素青,沈渭洲.大民屯凹陷沙河街组四段、三段层序特征及其与油气成藏条件之间的关系[J].地球学报,2006,27(1):57-62[Sui Suqing,Shen Weizhou.Sequence stratigraphic characteristics of No.3and No.4Members of Shahejie Formation in Damintun Sag and relation to petroleum exploration[J].Acta Geoscientia Sinica,2006,27(1):57-62]
10吴坚,张塞,闫桂花,等.波阻抗反演技术在区域层序地层研究中的应用[J].石油地球物理勘探,2002,37:58-60[Wu Jian,Zhang Sai,Yan Guihua,et al.Application of wave impedance inversion in sequence stratigraphy[J].Oil Geophysical Prospecting,2002,37:58-60]
11黄传炎,王华,肖敦清,等.板桥凹陷断裂陡坡带沙一段层序样式和沉积体系特征及其成藏模式研究[J].沉积学报,2007,25(3):386-390[Huang Chuanyan,Wang Hua,XiaoDunqing,et al.Sequence patterns,characteristics of depositional systems and model of reser-voirs of fault steep slope belt of the First Member of Shahejie Forma-tion in Banqiao Sag[J].Acta Sedimentologica Sinica,2007,25(3):386-390]
2Vail P R.Seismic stratigraphy applications to hydrocarbon exploration[J].AAPG Memoir,1977,26:63-97
3刘招君,程日辉,易海永.层序地层学的概念、进展与争论[J].世界地质,1994,13(3):56-68[Liu Zhaojun,Cheng Rihui,Yi Haiyong.Concept,development and debate on sequence stratigraphy[J].World Geology,1994,13(3):56-68]
4李继红,魏魁生,厉太亮,等.非海相沉积层序的成因和构型特征[J].沉积学报,2002,20(3):409-415[Li Jihong,Wei Kuisheng,Li Tailiang,et al.Genetic&architectural characteristics of non-marine depositional sequence[J].Acta Sedimentologica Sinica,2002,20(3):409-415]
5瞿辉,赵文智.层序格架在油气勘探中的作用[J].石油勘探与开发,2000,27(5):40-43[Zai Hui,Zhao Wenzhi.The application of se-quence framework to oil and gas exploration[J].Petroleum Exploration and Development,2000,27(5):40-43]
6张万选,张厚福,刘震.陆相地震地层学[M].山东东营:石油大学出版社,1993[Zhang Wanxuan,Zhang Houfu,Liu Zhen.Continental Seismic Stratigraphy[M].Dongying Shandong:Petroleum University Press,1993]
7汲生珍,刘震.波阻抗反演技术在层序地层与沉积分析中的应用[J].石油勘探与开发,2005,32(6):66-68[Ji Shengzheng,Liu Zhen.Application of wave impedance inversion in sequence stratigra-phy and sedimentary analyses[J].Petroleum Exploration and Develop-ment,2005,32(6):66-68]
8郝石生,贺志勇,高耀武,等.恢复地层剥蚀厚度的最优化方法[J].沉积学报,1988,6(4):93-99[Hao Shisheng,He Zhiwu,Gao Yaowu,et al.The optimal method for estimating the removed thickness of sedi-ment using homogenization temperature of fluid inclusions[J].Acta Sedimentologica Sinica,1988,6(4):93-99]
9孙素青,沈渭洲.大民屯凹陷沙河街组四段、三段层序特征及其与油气成藏条件之间的关系[J].地球学报,2006,27(1):57-62[Sui Suqing,Shen Weizhou.Sequence stratigraphic characteristics of No.3and No.4Members of Shahejie Formation in Damintun Sag and relation to petroleum exploration[J].Acta Geoscientia Sinica,2006,27(1):57-62]
10吴坚,张塞,闫桂花,等.波阻抗反演技术在区域层序地层研究中的应用[J].石油地球物理勘探,2002,37:58-60[Wu Jian,Zhang Sai,Yan Guihua,et al.Application of wave impedance inversion in sequence stratigraphy[J].Oil Geophysical Prospecting,2002,37:58-60]
11黄传炎,王华,肖敦清,等.板桥凹陷断裂陡坡带沙一段层序样式和沉积体系特征及其成藏模式研究[J].沉积学报,2007,25(3):386-390[Huang Chuanyan,Wang Hua,XiaoDunqing,et al.Sequence patterns,characteristics of depositional systems and model of reser-voirs of fault steep slope belt of the First Member of Shahejie Forma-tion in Banqiao Sag[J].Acta Sedimentologica Sinica,2007,25(3):386-390]
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