准噶尔车排子地区沙湾组含油砂岩地震正演模拟
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摘要
利用地震资料直接找油气的基础是通过精细岩石物理分析和精确正演模拟揭示储集层岩性、物性和流体与地震反射特征的关系。对车排子地区沙湾组储集层岩石物理参数的统计表明,该区油层、水层和干层之间物性参数存在一定差异,应用实际测井资料进行精细地震正演、流体替换和AVO模拟发现,沙湾组砂岩在含油饱和度大于70%时,表现为强振幅和振幅随炮检距增大而增大的AVO特征,含油饱和度小于40%时,则相反;含油饱和度为40%~70%时,其振幅随炮检距变化而基本不变。应用建立的虚拟测井曲线进行地震正演模拟,结合叠前、叠后地震属性分析,对钻探目标进行评价,实现了砂体含油性预测,预测结果与实钻吻合。图6参11
The fundamentals of finding hydrocarbons with seismic data is to reveal the relations of lithology,petrophysical property,fluid and the seismic reflection features by petrophysical analysis and exact forward modeling.Statistics of petrophysical parameters of the Shawan reservoirs in the Chepaizi region indicates differences of petrophysical parameters between oil layer,water layer and dry layer.The seismic forward modeling,fluid substitution and AVO modeling with actual log data showed that when the Shawan sand oil saturation is more than 70%,high reflection amplitude and the AVO feature of amplitude increasing with offset are reflected;when oil saturation less than 40%,the results are contrary;when oil saturation being 40%-70%,the amplitude is stable with the change of offset.According to these conditions,the drilling targets were appraised with forward modeling of pseudo logging set combining with prestack and poststack seismic attributes analysis.The oil-bearing performance of sand body was predicted and the prediction was consistent with the actual drilling results.
The fundamentals of finding hydrocarbons with seismic data is to reveal the relations of lithology,petrophysical property,fluid and the seismic reflection features by petrophysical analysis and exact forward modeling.Statistics of petrophysical parameters of the Shawan reservoirs in the Chepaizi region indicates differences of petrophysical parameters between oil layer,water layer and dry layer.The seismic forward modeling,fluid substitution and AVO modeling with actual log data showed that when the Shawan sand oil saturation is more than 70%,high reflection amplitude and the AVO feature of amplitude increasing with offset are reflected;when oil saturation less than 40%,the results are contrary;when oil saturation being 40%-70%,the amplitude is stable with the change of offset.According to these conditions,the drilling targets were appraised with forward modeling of pseudo logging set combining with prestack and poststack seismic attributes analysis.The oil-bearing performance of sand body was predicted and the prediction was consistent with the actual drilling results.
引文
[1]向奎,鲍志东,庄文山.准噶尔盆地滩坝砂石油地质特征及勘探意义——以排2井沙湾组为例[J].石油勘探与开发,2008,35(2):195-200.Xiang Kui,Bao Zhidong,Zhuang Wenshan.Petroleum geologyand exploration of beach sandbar in Junggar Basin,NW China:Acase from the Shawan Formation in Well Pai 2[J].PetroleumExploration and Development,2008,35(2):195-200.
[2]马中高,管路平,贺振华,等.利用模型正演优选地震属性进行储层预测[J].石油学报,2003,24(6):35-39.Ma Zhonggao,Guan Luping,He Zhenhua,et al.Reservoircharacterization using seismic attributes optimized with rockphysical modeling[J].Acta Petrolei Sinica,2003,24(6):35-39.
[3]季敏,王尚旭,李生杰,等.物理模型的地震属性预测效果分析[J].石油勘探与开发,2007,34(3):339-341.Ji Min,Wang Shangxu,Li Shengjie,et al.An analysis ofattribute prediction result in seismic physical modeling[J].Petroleum Exploration and Development,2007,34(3):339-341.
[4]叶康礼.Promax AVO正演模型的应用[J].中国海上油气(地质),2000,14(4):274-276.Ye Kangli.An application of AVO forward modeling in Promaxsystem[J].China Offshore Oil and Gas(Geology),2000,14(4):274-276.
[5]张建宁.牛庄洼陷浊积岩砂体储层物性地震预测[J].石油地球物理勘探,2005,40(6):551-555.Zhang Jianning.The seismic prediction of turbidite sand bodiesreservoir physical properties in Niuzhuang sag[J].OilGeophysical Prospecting,2005,40(6):551-555.
[6]曹辉.关于地震属性应用的几点认识[J].勘探地球物理进展,2002,25(5):18-22.Cao Hui.Discussion on the application of seismic attributes[J].Progress in Exploration Geophysics,2002,25(5):18-22.
[7]刘文岭,牛彦良,李刚,等.多信息储层预测地震属性提取与有效性分析方法[J].石油物探,2002,41(1):100-106.Liu Wenling,Niu Yanliang,Li Gang,et al.Seisic attributeextraction and effectiveness analysis of multi-attribute reservoirprediction[J].Geophysical Prospecting for Petroleum,2002,41(1):100-106.
[8]乐友喜,王永刚,张军华.由地震属性向储层参数转换的综合效果分析[J].石油物探,2002,41(2):202-206.Yue Youxi,Wang Yonggang,Zhang Junhua.A comprehensiveeffect analysis of conversion from seismic attributes to reservoirparameters[J].Geophysical Prospecting for Petroleum,2002,41(2):202-206.
[9]杨绍国,周熙襄.AVO属性叠加剖面的正演模型及应用[J].石油地球物理勘探,1995,30(6):772-774.Yang Shaoguo,Zhou Xixiang.Forward modeling for AVOcharacteristic stack section and application[J].Oil GeophysicalProspecting,1995,30(6):772-774.
[10]Carcione J M.Amplitude variations with offset of pressure-sealreflections[J].Geophysics,2001,66(1):283-293.
[11]Castagna J P,Swan H W.Framework for AVO gradient andintercept interpretation[J].Geophysics,1998,63(3):948-956.
[2]马中高,管路平,贺振华,等.利用模型正演优选地震属性进行储层预测[J].石油学报,2003,24(6):35-39.Ma Zhonggao,Guan Luping,He Zhenhua,et al.Reservoircharacterization using seismic attributes optimized with rockphysical modeling[J].Acta Petrolei Sinica,2003,24(6):35-39.
[3]季敏,王尚旭,李生杰,等.物理模型的地震属性预测效果分析[J].石油勘探与开发,2007,34(3):339-341.Ji Min,Wang Shangxu,Li Shengjie,et al.An analysis ofattribute prediction result in seismic physical modeling[J].Petroleum Exploration and Development,2007,34(3):339-341.
[4]叶康礼.Promax AVO正演模型的应用[J].中国海上油气(地质),2000,14(4):274-276.Ye Kangli.An application of AVO forward modeling in Promaxsystem[J].China Offshore Oil and Gas(Geology),2000,14(4):274-276.
[5]张建宁.牛庄洼陷浊积岩砂体储层物性地震预测[J].石油地球物理勘探,2005,40(6):551-555.Zhang Jianning.The seismic prediction of turbidite sand bodiesreservoir physical properties in Niuzhuang sag[J].OilGeophysical Prospecting,2005,40(6):551-555.
[6]曹辉.关于地震属性应用的几点认识[J].勘探地球物理进展,2002,25(5):18-22.Cao Hui.Discussion on the application of seismic attributes[J].Progress in Exploration Geophysics,2002,25(5):18-22.
[7]刘文岭,牛彦良,李刚,等.多信息储层预测地震属性提取与有效性分析方法[J].石油物探,2002,41(1):100-106.Liu Wenling,Niu Yanliang,Li Gang,et al.Seisic attributeextraction and effectiveness analysis of multi-attribute reservoirprediction[J].Geophysical Prospecting for Petroleum,2002,41(1):100-106.
[8]乐友喜,王永刚,张军华.由地震属性向储层参数转换的综合效果分析[J].石油物探,2002,41(2):202-206.Yue Youxi,Wang Yonggang,Zhang Junhua.A comprehensiveeffect analysis of conversion from seismic attributes to reservoirparameters[J].Geophysical Prospecting for Petroleum,2002,41(2):202-206.
[9]杨绍国,周熙襄.AVO属性叠加剖面的正演模型及应用[J].石油地球物理勘探,1995,30(6):772-774.Yang Shaoguo,Zhou Xixiang.Forward modeling for AVOcharacteristic stack section and application[J].Oil GeophysicalProspecting,1995,30(6):772-774.
[10]Carcione J M.Amplitude variations with offset of pressure-sealreflections[J].Geophysics,2001,66(1):283-293.
[11]Castagna J P,Swan H W.Framework for AVO gradient andintercept interpretation[J].Geophysics,1998,63(3):948-956.
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