川东高峰场地区长兴组生物礁地震预测
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摘要
高峰场区块在上二叠世末期位于"开江—梁平"海槽东南消失过渡带,为缓坡沉积环境。长兴组地层厚度在各相带内变化较小,生物礁发育区地层厚度无明显增厚特征,导致该区生物礁预测难度增大。早期地震数据处理针对多个目的层进行,由处理引起的长兴组内部杂乱地震反射假象影响了生物礁预测精度,多口生物礁专探井失误。专门针对长兴组进行了保真保幅的地震数据精细处理,提高了长兴组内部成像效果;分析了该区生物礁地震相并总结了地震响应特征。模型正演分析表明,通过长兴组顶部振幅分析不能精细预测生物礁的边界。结合钻井分析和地震正演结果,针对生物礁杂乱反射特征不明显和长兴组顶部振幅分析的不足,采用分频解释技术,提高了生物礁预测的精度。
In the end of the Permian period,Gaofengchang area is located in the disappeared transition zone of southeastern "Kaijiang-Liangping" trough as the gentle slope sedimentary environment.The thickness of Changxing Formation varies little in each sedimentary facies,so does the almost invariant formation thickness of reef developed area,which increases the difficulty of reef prediction.Early seismic data processing aims at multi-formations,which leads to mixed and disorderly seismic reflection of internal Changxing and eventually affects the accuracy of reef prediction.As a result,several reef exploration wells had failed in the area.Therefore,we carry out fidelity-preservation and amplitude-preservation fine processing on seismic data to improve the internal imaging effect in Changxing Formation.Meanwhile,we analyze the reef sedimentary facies and conclude their seismic responses.Model simulation indicates that the boundary of reef cannot be finely predicted by amplitude analysis at the top of Changxing Formation.Combining drilling analysis with seismic simulation results,aiming at the above deficiencies,the frequency-division interpretation technique is used on seismic data fine processed specifically for Changxing Formation which improves the accuracy of reef prediction.
In the end of the Permian period,Gaofengchang area is located in the disappeared transition zone of southeastern "Kaijiang-Liangping" trough as the gentle slope sedimentary environment.The thickness of Changxing Formation varies little in each sedimentary facies,so does the almost invariant formation thickness of reef developed area,which increases the difficulty of reef prediction.Early seismic data processing aims at multi-formations,which leads to mixed and disorderly seismic reflection of internal Changxing and eventually affects the accuracy of reef prediction.As a result,several reef exploration wells had failed in the area.Therefore,we carry out fidelity-preservation and amplitude-preservation fine processing on seismic data to improve the internal imaging effect in Changxing Formation.Meanwhile,we analyze the reef sedimentary facies and conclude their seismic responses.Model simulation indicates that the boundary of reef cannot be finely predicted by amplitude analysis at the top of Changxing Formation.Combining drilling analysis with seismic simulation results,aiming at the above deficiencies,the frequency-division interpretation technique is used on seismic data fine processed specifically for Changxing Formation which improves the accuracy of reef prediction.
引文
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[12]彭才,张延充,梅燕,等.川中地区飞仙关组高能鲕滩储层地震预测[J].石油物探,2010,49(5):504-508Peng C,Zhang Y C,Mei Y,et al.Seismic predictionon high-energy oolitic-beach reservoir of FeixianguanFormation in central Sichuan Basin[J].GeophysicalProspecting for Petroleum,2010,49(5):504-508
[13]彭才,刘克难,张延充,等.川中地区长兴组生物礁地震沉积学研究[J].天然气地球科学,2011,22(3):1-5Peng C,Liu K N,Zhang Y C,et al.Seismic sedimen-tology of Organic Reef from the Changxing Forma-tion of Central Sichuan[J].Natural Gas Geoscience,2011,22(3):1-5
[14]董春梅,张宪国,林承焰.有关地震沉积学若干问题的探讨[J].石油地球物理勘探,2006,41(4):405-410Dong C M,Zhang X G,Lin C Y.Discussion on sev-eral issues about seismic sedimentology[J].Oil Geo-physical Prospecting,2006,41(4):405-410
[15]刘保国,刘力辉.实用地震沉积学在沉积相分析中的应用[J].石油物探,2008,47(3):266-271Liu B G,Liu L H.Application of applied seismicsedimentology in sedimentary facies analysis[J].Ge-ophysical Prospecting for Petroleum,2008,47(3):266-271
[2]张延充,杨爱国,梅燕,等.泛开江—梁平海槽及勘探有利相带地震预测[J].天然气工业,2009,29(10):28-30Zhang Y C,Yang A G,Mei Y,et al.Kaijiang-Liang-ping Pan-trough and seismic prediction of favorablefaciesbelt[J].Natural Gas Industry,2009,29(10):28-30
[3]黄先平,杨天泉,张红梅,等.四川盆地下二叠统沉积相及其勘探潜力区研究[J].天然气工业,2004,24(1):10-12Huang X P,Yang T Q,Zhang H M,et al.Researchon the sedimentary facoes amd explorarion potentialareas of lower Permian in Sichuan Basin[J].NaturalGas Industry,2004,24(1):10-12
[4]钟怡江,陈洪德,林良彪,等.川东北地区长兴期—飞仙关期沉积体系分析[J].石油物探,2010,49(5):522-530Zhong Y J,Chen H D,Lin L B,et al.Depositionalsystem of Changxing-Feixianguan period in North-eastern Sichuan Basin[J].Geophysical Prospectingfor Petroleum,2010,49(5):522-530
[5]胡伟光,蒲勇,赵卓男,等.川东北元坝地区长兴组生物礁的识别[J].石油物探,2010,49(1):46-53Hu W G,Pu Y,Zhao Z N,et al.Identification of reefreservoir of Changxing formation in Yuanba area ofNortheastern Sichuan Basin[J].Geophysical Pros-pecting for Petroleum,2010,49(1):46-53
[6]殷积峰,李军,谢芬,等.波形分类技术在川东生物礁气藏预测中的应用[J].石油物探,2007,46(1):53-57Yin J F,Li J,Xie F,et al.Application of waveformclassification technique in predicting reef gas pool ineast Sichuan basin[J].Geophysical Prospecting forPetroleum,2007,46(1):53-57
[7]肖秋红,李雷涛,屈大鹏,等.YB地区长兴组礁滩地震相精细刻画[J].石油物探,2012,51(1):98-103Xiao Q H,Li L T,Qu D P,et al.Fine description onthe seismic facies of reef-beach reservoir in Changx-ing formation,YB area[J].Geophysical Prospectingfor Petroleum,2012,51(1):98-103
[8]陈勇.川东北元坝地区长兴组生物礁储层预测研究[J].石油物探,2011,50(2):173-180Chen Y.Prediction on reef reservoir in Changxinggroup of Yuanba area,Northeast Sichuan Basin[J].Geophysical Prospecting for Petroleum,2011,50(2):173-180
[9]龚立,梁波,张红,等.多参数聚类技术在川东北生物礁预测中的应用[J].石油物探,2007,46(4):384-389Gong L,Liang B,Zhang H,et al.Application ofmulti-parameter clustering analysis for reef predic-tion in the northeast Sichuan province[J].Geophys-ical Prospecting for Petroleum,2007,46(4):384-389
[10]赵邦六,杜小弟.生物礁地质特征与地球物理识别[M].北京:石油工业出版社,2009,125-211Zhao B L,Du X D.Reef geology and geophysical rec-ognition[M].Beijing:Petroleum Industry Press,2009,125-211
[11]张延充,彭才,杨雨,等.四川盆地飞仙关组高能鲕滩储层地震层序识别[J].天然气工业,2010,30(3):8-11Zhang Y C,Peng C,Yang Y,et al.Identification ofseismic sequences of high-energy oolitic beach reser-voirs in the Feixianguan Formation in the SichuanBasin[J].Natural Gas Industry,2010,30(3):8-11
[12]彭才,张延充,梅燕,等.川中地区飞仙关组高能鲕滩储层地震预测[J].石油物探,2010,49(5):504-508Peng C,Zhang Y C,Mei Y,et al.Seismic predictionon high-energy oolitic-beach reservoir of FeixianguanFormation in central Sichuan Basin[J].GeophysicalProspecting for Petroleum,2010,49(5):504-508
[13]彭才,刘克难,张延充,等.川中地区长兴组生物礁地震沉积学研究[J].天然气地球科学,2011,22(3):1-5Peng C,Liu K N,Zhang Y C,et al.Seismic sedimen-tology of Organic Reef from the Changxing Forma-tion of Central Sichuan[J].Natural Gas Geoscience,2011,22(3):1-5
[14]董春梅,张宪国,林承焰.有关地震沉积学若干问题的探讨[J].石油地球物理勘探,2006,41(4):405-410Dong C M,Zhang X G,Lin C Y.Discussion on sev-eral issues about seismic sedimentology[J].Oil Geo-physical Prospecting,2006,41(4):405-410
[15]刘保国,刘力辉.实用地震沉积学在沉积相分析中的应用[J].石油物探,2008,47(3):266-271Liu B G,Liu L H.Application of applied seismicsedimentology in sedimentary facies analysis[J].Ge-ophysical Prospecting for Petroleum,2008,47(3):266-271
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