应用地震属性分析研究十屋油田下白垩统营城组沉积体系分布
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摘要
地震均方根振幅与岩石密度呈正相关,因此可以利用地震均方根振幅大小来识别岩性,判别岩相。在十屋工作区选择了16口钻遇营城组的钻井,对与切片对应的15 ms内的营城组岩性、岩相进行统计,分析统计了岩性、岩相与对应几种均方根振幅属性。根据均方根振幅颜色数值的大小,把均方根振幅等时切片上各点分成强、强-中、中-弱和弱4个等级。在均方根振幅等时切片上按照等级来划分区域。以地震响应特征对应的地质意义为依据,对划分区域的岩性、岩相进行预测。将本区岩性划分为砂岩、泥岩,岩相划分为三角洲相、扇三角洲相和湖泊相,并据此制作了研究区营城组沉积微相平面分布图,进而确定了研究区发育的4个沉积体系:西部沉积体系、东部沉积体系、东北部沉积体系和南部沉积体系。通过钻井验证了南部沉积体系的存在。
Seismic RMS amplitude is positively correlated with density of rock.The values of RMS amplitude can be used to identify lithology and lithofacies.The statistics of lithology and lithofacies of Members IV of Yingcheng Formation,which corresponds with the 15 ms time slice,is taken through the selected 16 drilling wells with Yingcheng Formation in Shiwu area.The lithology,lithofacies and RMS amplitude attributes which corresponding with them are analyzed.According to the size of the color's value of RMS amplitude,the points in the RMS amplitude time slice can be classified as four grades: strong,strong-moderate,moderate-weak and weak.Prediction of lithology and lithofacies in the areas is carried out according to the correspondences between geological significance and seismic response characteristics.The lithology in the study area can be divided into sandstone and mudstone.The lithofacies can be divided into delta facies,fan delta facies and lacustrine facies.Four sedimentary systems are mapped in the study area as west sedimentary system,east sedimentary system,northeast sedimentary system and south sedimentary system.The existence of the south sedimentary system is verified by the drilling well.
Seismic RMS amplitude is positively correlated with density of rock.The values of RMS amplitude can be used to identify lithology and lithofacies.The statistics of lithology and lithofacies of Members IV of Yingcheng Formation,which corresponds with the 15 ms time slice,is taken through the selected 16 drilling wells with Yingcheng Formation in Shiwu area.The lithology,lithofacies and RMS amplitude attributes which corresponding with them are analyzed.According to the size of the color's value of RMS amplitude,the points in the RMS amplitude time slice can be classified as four grades: strong,strong-moderate,moderate-weak and weak.Prediction of lithology and lithofacies in the areas is carried out according to the correspondences between geological significance and seismic response characteristics.The lithology in the study area can be divided into sandstone and mudstone.The lithofacies can be divided into delta facies,fan delta facies and lacustrine facies.Four sedimentary systems are mapped in the study area as west sedimentary system,east sedimentary system,northeast sedimentary system and south sedimentary system.The existence of the south sedimentary system is verified by the drilling well.
引文
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[18]李淑玲,孟小红,付立新,等.综合地球物理方法在华南桂中海相残留盆地沉积相预测中的应用[J].地球物理学报,2009,52(10):2619-2626.LI Shu-ling,MENG Xiao-hong,FU Li-xin,et al.Applica-tion of integrative geophysical methods to predicting se-dimentary facies of marine residual basins in middleGuangxi Province,China[J].Chinese Journal of Geo-physics,2009,52(10):2619-2626.
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[21]Brown A R.Pitfalls in 3D seismic interpretation[J].The Leading Edge,2005,24(7):716-717.
[2]唐黎明.松辽盆地十屋断陷沉积特征与油气前景[J].吉林大学学报:地球科学版,2002,32(4):345-348.TANG Li-ming.The sedimentary characteristics and hy-drocarbon[J].Journal of Jilin University:Earth ScienceEdition,2002,32(4):345-348.
[3]王果寿,陈振林,吴金才.松辽盆地南部下白至统地震相及沉积体系[J].江汉石油学院学报,1995,17(4):12-18.WANG Guo-shou,CHEN Zhen-lin,WU Jin-cai.Seismicfacies and depositional systems of Lower Cretaceous insouthern Songliao basin[J].Journal of Jianghan Petrole-um Institute,1995,17(4):12-18.
[4]袁红军,刘民,王振升,等.十屋断陷小宽断裂带的走滑特征研究及其勘探前景分析[J].石油物探,2009,48(6):596-600.YUAN Hong-jun,LIU Min,WANG Zhen-sheng,et al.Study on strike-slip structural features of Xiaokuan faultedzone in Shiwu fault depression and analysis on its explora-tion perspective[J].Geophysical Prospecting for Petrole-um,2009,48(6):596-600.
[5]Fatti J L,Smith G C,Vail P J,et al.Detection of gas insandstone reservoirs using AVO analysis[J].Geophy-sics,1994,59(9):1362-1367.
[6]Wang Y H.Approximations Zoeppritz equations and theiruse in AVO analysis[J].Geophysics,1999,64:1920-1927.
[7]Laurain R,Vinje V,Strand C.Simulated migration am-plitude for improving amplitude estimates in seismic illu-mination studies[J].The Leading Edge,2004,23(3):240-245.
[8]郭华军,李庆成.地震属性技术的历史、现状及发展趋势[J].物探与化探,2008,32(1):19-22.GUO Hua-jun,LI Qing-cheng.The discussion of earth-quake attribute technology’s history,present situationand development tendency[J].Geophysical and Geo-chemical Exploration,2008,32(1):19-22.
[9]Chopra S,Marfurt K J.Seismic attributes:a historicalperspective[J].Geophysics,2005,70(5):3-28.
[10]Brown A R.Seismic attribute and their classification[J].The Leading Edge,1996,15(10):1090.
[11]黄绪德.地震勘探直接找油气在国外的最新发展[J].勘探地球物理进展,2004,27(3):218-227.HUANG Xu-de.Direct hydrocarbon detection via seis-mic prospecting:a review of overseas advances[J].Progress in Exploration Geophysics,2004,27(3):218-227.
[12]吴媚,符力耘,李维新.高分辨率非线性储层物性参数反演方法和应用[J].地球物理学报,2008,51(2):546-557.WU Mei,FU Li-yun,LI Wei-xin.A high-resolutionnonlinear inversion method of reservoir parameters andits application to oil/gas exploration[J].Chinese Jour-nal of Geophysics,2008,51(2):546-557.
[13]姚陈,蔡明刚,王赟.各向同性薄层反射理论地震图[J].地球物理学报,2010,53(1):164-170.YAO Chen,CAI Ming-gang,WANG Yun.Syntheticseismograms of reflection from isotropic thin layer[J].Chinese Journal of Geophysics,2010,53(1):164-170.
[14]Prskalo S.Application of relations between seismic am-plitude,velocity and lithology in geological interpretationof seismic data[J].Journal of Hungarian Geoma-the-matics,2004,2:51-68.
[15]Chen Q,Sidney S.Seismic attribute technology for res-ervoir forecasting and monitoring[J].The LeadingEdge,1997,16(5):445-456.
[16]王咸彬,顾石庆.地震属性的应用与认识[J].石油物探,2004,43(增刊):25-27.WANG Xian-bin,GU Shi-qing.Application and recog-nition in seismic attribute[J].Geophysical Prospectingfor Petroleum,2004,43(Sup.):25-27.
[17]李坦,殷小舟.地震属性的地质意义分析[J].复杂油气藏,2009(3):445-450.LI Tan,YIN Xiao-zhou.Analysis on the geological sig-nificance of seismic attributes[J].Complex Hydrocar-bon Reservoirs,2009(3):445-450.
[18]李淑玲,孟小红,付立新,等.综合地球物理方法在华南桂中海相残留盆地沉积相预测中的应用[J].地球物理学报,2009,52(10):2619-2626.LI Shu-ling,MENG Xiao-hong,FU Li-xin,et al.Applica-tion of integrative geophysical methods to predicting se-dimentary facies of marine residual basins in middleGuangxi Province,China[J].Chinese Journal of Geo-physics,2009,52(10):2619-2626.
[19]Gardner G H F,Gardner L W,Gregory A R.Formationvelocity and density:the diagnostic basics for strati-graphic traps[J].Geophysics,1999,39(6):770-780.
[20]Barnes A E.Redundant and useless seismic attributes[J].Geophysics,2007,72(3):33-38.
[21]Brown A R.Pitfalls in 3D seismic interpretation[J].The Leading Edge,2005,24(7):716-717.
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