泥砂岩薄互层时移测井曲线预测方法
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摘要
为满足泥砂岩薄互层储层时移地震研究需求,实现油藏开发后测井曲线预测,在岩石物理模型理论分析、实际岩心观察和测井数据分辨率分析基础上,提出在薄互层储层测井曲线预测时将砂岩薄层与泥岩薄层分开,并将油藏参数变化限定于砂岩薄层的方案,从而使计算过程符合实际油藏条件.建立了时移测井曲线预测工作流程,并利用实际薄互层油藏开发前测井曲线和开发前后温度、压力和饱和度变化参数,实现了油藏开发后测井曲线预测.实际油藏开发后测井曲线预测结果与油藏参数变化有很好一致性,变化范围合理.
In order to meet the needs of time-lapse seismic research of thin shale-sand inter-bed reservoirs,it is proposed that,in the prediction of logging curve of thin shale-sand inter-bed reservoirs after reservoir development,thin sand layers and shale layers should be studied separately,and it is assumed that the parameters of the reservoirs should change only in the sand layers,which accords with real conditions of the reservoirs.The work flow for the prediction of time-lapse log curve is established.The logging curves of a developed thin shale-sand inter-bed reservoir are predicted by using the log data before reservoir development and the variation of temperature,effective pressure and water saturation before and after reservoir development as inputs.The predicted log curves accord with the variation of the reservoir parameters,and the variation of the reservoir parameters is in reasonable ranges.
In order to meet the needs of time-lapse seismic research of thin shale-sand inter-bed reservoirs,it is proposed that,in the prediction of logging curve of thin shale-sand inter-bed reservoirs after reservoir development,thin sand layers and shale layers should be studied separately,and it is assumed that the parameters of the reservoirs should change only in the sand layers,which accords with real conditions of the reservoirs.The work flow for the prediction of time-lapse log curve is established.The logging curves of a developed thin shale-sand inter-bed reservoir are predicted by using the log data before reservoir development and the variation of temperature,effective pressure and water saturation before and after reservoir development as inputs.The predicted log curves accord with the variation of the reservoir parameters,and the variation of the reservoir parameters is in reasonable ranges.
引文
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[2]桑淑云,姜秀娣,李丽霞.时移地震技术在绥中36-1油田脱气监测中的应用研究[J].中国海上油气,2008,20(4):246-249.SANG Shu-yun,JIANG Xiu-di,LI Li-xia.An applicationof seismic time-lapse technique in monitoring degassifica-tion of SZ36-1 oilfield[J].China Offshore Oil and Gas,2008,20(4):246-249.
[3]Ying Z,Laurence R.Time-lapse well log analysis,fluidsubstitution and AVO[C].SEG International Expositionand 72nd Annual Meeting,2002.
[4]Sung H Y,Seongsik Y.Effects of pressure and fluid satu-ration changes on time-lapse AVO response[C].SEG In-ternational Exposition and 70th Annual Meeting,2000.
[5]Landro M.Discrimination between pressure and fluid satu-ration changes from marine multicomponent time-lapseseismic data[J].Geophysics,2003,66(3):836-844.
[6]Batzle M,Wang Z.Seismic properties of pore fluids[J].Geophysics,1992,57(11):1396-1408.
[7]Mavko G,Mukerji T,Dvorkin J.The Rock Physics Hand-book[M].New York:Cambridge University Press,2009:207-311.
[8]Gassmann F.Elastic waves through a packing of spheres[J].Geophysics,1951,16(4):673-685.
[9]Eberhart-Phillips D,Han D,Zoback D.Empirical relation-ships among seismic velocity,effective pressure,porosityand clay content in sandstone[J].Geophysics,1989,54(1):82-89.
[10]Shapiro S.Elastic piezosensitivity of porous and fracturedrock[J].Geophysics,2003,68(2):482-486.
[11]Vernik L,Hamman J.Stress sensitivity of sandstones and4D applications[J].The Leading Edge,2009,28(1):90-93.
[12]Christopher S.Fluid substitution in laminated sands[J].The Leading Edge,2004,23(5):485-493.
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