基于叠后地震数据的南堡凹陷高南斜坡带三角洲扇体识别及演化特征
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摘要
以南堡凹陷高南斜坡带扇三角洲为研究对象,利用井震结合划分三级及四级层序;利用地震沉积学方法,采用叠后地震技术,对东营组三段地层做薄层瞬时地震属性,进而进行扇体和富砂区识别,并分析其时空演化规律;结合岩石物性资料,预测优质储层发育区域。东三下段发育3个主扇体,凹陷中部、东部扇体持续发育,凹陷西部扇体萎缩;沉积中心整体向西部迁移,河口坝规模呈现了"小-大-小"的发育过程,沿河道呈串珠状分布。东三上段发育4个主扇体,凹陷西部扇体发育,凹陷东部扇体萎缩,凹陷中部扇体经历了"分支-再合并"过程;沉积中心向东部迁移,河口坝前期规模保持稳定,连片分布,后期规模变小,呈串珠状分布。研究区扇体可分为弓形、朵状、长条状、鸟足状4类,河口坝、水下分流河道为优质储层。东三下段有利区带主要发育于研究区中东部地区,存在2个优质区,独立分布;东三上段有利区带主要发育于研究区中西部地区,存在3个优质区,连片分布。
The fan delta of the Gaonan slope belt in the Nanpu Sag was taken as the research object in this study. The three-level sequence and the fourth-order sequence of the third member of the Dongying Formation(Ed_3) were divided by the well-seismic combination analysis. With the seismic sedimentary method, the post-stack seismic technology and the instantaneous seismic properties of the thin layer were used to identify the fan delta and sand-rich areas as well as the temporal and spatial evolution. The high-quality reservoir development areas were predicted through the study of the physical properties of sandstones. Three main fan bodies are developed in the lower part of the third member of the Dongying Formation. The central and eastern fan body displays an inherited development, while the western fan body shrinks. The sedimentary center demonstrates a westward migration, and the estuary dams scale present a development process of "small-large-small", distributed along the channels. Four main fan bodies are developed in the upper part of the third member of the Dongying Formation. The western fan displays an inherited development, while the eastern fan body shrinks. The middle fan body processes with "branch-remerge" characteristics. The sedimentary center exhibitss an eastward migration. The estuary dams remained stable in the early stage, and later became smaller and beaded. The fan body in the study area could be divided into four types: fan-shaped, flower-shaped, long-shaped, and bird-footed. The estuarine dams and underwater distributary channels of two sedimentary microfacies sands are high-quality reservoirs. Two high-quality areas are developed in the lower part of the third member of the Dongying Formation, and the favorable zones are mainly developed in the middle and eastern parts of the study area, displaying an independent distribution feature. Three high-quality areas are developed in the upper part of the third member of the Dongying Formation, and the favorable zones are mainly developed in the middle and eastern parts of the study area, showing a continuous distribution.
The fan delta of the Gaonan slope belt in the Nanpu Sag was taken as the research object in this study. The three-level sequence and the fourth-order sequence of the third member of the Dongying Formation(Ed_3) were divided by the well-seismic combination analysis. With the seismic sedimentary method, the post-stack seismic technology and the instantaneous seismic properties of the thin layer were used to identify the fan delta and sand-rich areas as well as the temporal and spatial evolution. The high-quality reservoir development areas were predicted through the study of the physical properties of sandstones. Three main fan bodies are developed in the lower part of the third member of the Dongying Formation. The central and eastern fan body displays an inherited development, while the western fan body shrinks. The sedimentary center demonstrates a westward migration, and the estuary dams scale present a development process of "small-large-small", distributed along the channels. Four main fan bodies are developed in the upper part of the third member of the Dongying Formation. The western fan displays an inherited development, while the eastern fan body shrinks. The middle fan body processes with "branch-remerge" characteristics. The sedimentary center exhibitss an eastward migration. The estuary dams remained stable in the early stage, and later became smaller and beaded. The fan body in the study area could be divided into four types: fan-shaped, flower-shaped, long-shaped, and bird-footed. The estuarine dams and underwater distributary channels of two sedimentary microfacies sands are high-quality reservoirs. Two high-quality areas are developed in the lower part of the third member of the Dongying Formation, and the favorable zones are mainly developed in the middle and eastern parts of the study area, displaying an independent distribution feature. Three high-quality areas are developed in the upper part of the third member of the Dongying Formation, and the favorable zones are mainly developed in the middle and eastern parts of the study area, showing a continuous distribution.
引文
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[20] 贺锡雷,林凯,张祖豪,等.孔隙度和孔隙结构对储层特性影响的定量比较[J].石油物探,2018,57(2):179-185.
[21] 盛伟琰,杨江涛.南堡凹陷古近系储层特征及形成主控因素研究[J].石化技术,2017,24(3):144.
[22] 吴浩,纪友亮,周勇,等.南堡凹陷南部古近系深层优质储层成因[J/OL].中国矿业大学学报,2019,48(3):1-17.
[23] 刘海青,李艳梅,吴琳娜,等.南堡凹陷高柳地区东营组沉积体系及岩性油气藏成藏模式[J].石油地质与工程,2015,29(1):1-3.
[24] 高岗,董月霞,杨尚儒,等.南堡凹陷天然气成因类型与勘探领域分析[J].中国石油勘探,2017,22(6):16-26.
[25] 卿颖,张敬艺,汪浩源,等.南堡凹陷高南斜坡古近系岩性油藏勘探实践[J].特种油气藏,2013,20(6):48-51.
[26] 刚文哲,于聪,高岗,等.渤海湾盆地南堡凹陷滩海地区原油来源及勘探潜力分析[J].石油天然气学报,2011,33(11):1-8.
[2] 吴靖,姜在兴,王欣.湖相细粒沉积岩三-四级层序地层划分方法与特征:以渤海湾盆地东营凹陷古近系沙四上亚段为例[J].天然气地球科学,2018,29(2):199-210.
[3] Verma S,Bhattacharya S,Lujan B,et al.Delineation of early Jurassic aged sand dunes and paleo-wind direction in southwestern Wyoming using seismic attributes,inversion,and petrophysical modeling[J].Journal of Natural Gas Science and Engineering,2018,60(4):1-10.
[4] 李达,陶倩倩,隋波,等.地震沉积学技术在文昌A油田储层预测中的应用[J].地质科技情报,2015,34(5):172-179.
[5] Chen Si,Wang Hua,Zhou Lihong,et al.Recognition and depiction of special geologic bodies of Member 3 of Dongying Formation in littoral Slope Zone,Qikou Sag[J].Journal of Central South University of Technology (English Edition),2011,18(4): 898-908.
[6] 罗登贵,刘江平,金聪,等.活断层的地震响应特征与瞬时地震属性[J].地球科学,2017,42(3):462-470.
[7] 李俞锋,蒲仁海,贾学成,等.全局性地震切片的拾取及其应用[J].地质科技情报,2018,37(1):212-217.
[8] Yue Dali,Li Wei,Wang Wurong,et al.Fused spectral-decomposition seismic attributes and forward seismic modelling to predict sand bodies in meandering fluvial reservoirs[J].Marine and Petroleum Geology,2019,99(1):27-44.
[9] Ao Yile,Li Hongqi,Zhu LiPing,et al.Identifying channel sand-body from multiple seismic attributes with an improved random forest algorithm[J].Journal of Petroleum Science and Engineering,2019,173(1):781-792.
[10] 吕公河,于常青,董宁.叠后地震属性分析在油气田勘探开发中的应用[J].地球物理学进展,2006(1):161-166.
[11] 符志国,李忠,赵尧,等.薄砂岩储层多波叠后地震反射特征分析及应用[J].石油地球物理勘探,2017,52(5):1016-1024,881.
[12] 刘洋.基于相控神经网络的地震多属性储层厚度预测[J].成都理工大学学报:自然科学版,2018,45(2):221-228.
[13] 张军华,王庆峰,张晓辉,等.薄层和薄互层叠后地震解释关键技术综述[J].石油物探,2017,56(4):459-471,482.
[14] 赵迎冬,张永超,王全利,等.南堡凹陷物源体系发育特征与优质储层形成[J].地质科技情报,2018,37(1):128-134.
[15] Zhang Jianguo,Jiang Zaixing,Elizabeth G,et al.A double-cycle lake basin formed in extensional to transtensional setting: The Paleogene Nanpu Sag,Bohai Bay Basin,China [J].Sedimentary Geology,2017,349(6):15-32.
[16] 王观宏.南堡凹陷东营组堆积期构造活动的"双强效应"及其对沉积的控制[D].武汉:中国地质大学(武汉),2016.
[17] Jin Siding,Cao Haiyang,Wang Hua,et al.The Paleogene multi-phase tectono-sedimentary evolution of the syn-rift stage in the Nanpu Sag,Bohai Bay Basin,East China[J].Energy Exploration & Exploitation,2018,36(6),1519-1545.
[18] 王观宏,甘华军,赵忠新,等.南堡凹陷高柳断层活动特征及其对沉积的控制[J].东北石油大学学报,2018,42(2):51-61,120.
[19] Yuan Guanghui,Cao Yingchang,Zhang Yonghao,et al.Diagenesis and reservoir quality of sandstones with ancient “deep” incursion of meteoric freshwater:An example in the Nanpu Sag,Bohai Bay Basin,East China[J].Marine and Petroleum Geology,2017,82(3):444-464.
[20] 贺锡雷,林凯,张祖豪,等.孔隙度和孔隙结构对储层特性影响的定量比较[J].石油物探,2018,57(2):179-185.
[21] 盛伟琰,杨江涛.南堡凹陷古近系储层特征及形成主控因素研究[J].石化技术,2017,24(3):144.
[22] 吴浩,纪友亮,周勇,等.南堡凹陷南部古近系深层优质储层成因[J/OL].中国矿业大学学报,2019,48(3):1-17.
[23] 刘海青,李艳梅,吴琳娜,等.南堡凹陷高柳地区东营组沉积体系及岩性油气藏成藏模式[J].石油地质与工程,2015,29(1):1-3.
[24] 高岗,董月霞,杨尚儒,等.南堡凹陷天然气成因类型与勘探领域分析[J].中国石油勘探,2017,22(6):16-26.
[25] 卿颖,张敬艺,汪浩源,等.南堡凹陷高南斜坡古近系岩性油藏勘探实践[J].特种油气藏,2013,20(6):48-51.
[26] 刚文哲,于聪,高岗,等.渤海湾盆地南堡凹陷滩海地区原油来源及勘探潜力分析[J].石油天然气学报,2011,33(11):1-8.
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