基于模型正演的测井曲线重构技术在储层表征中的应用
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摘要
利用基于模型正演的测井曲线重构技术,采用同位协同克里金序贯高斯模拟方法将储层物性、测井响应、地震属性间的关系相结合进行随机建模,是稀井网条件下储层属性建模的有效办法,应用此方法建立了莺歌海盆地某气田莺歌海组二段Ⅱ下气组储层孔隙度模型。结果表明:测井正演重构曲线能有效地解决浅层气藏声波曲线畸变问题,建立较好的井震关系;用井约束反演波阻抗作为第二变量进行同位协同模拟,降低了随机模拟结果的不确定性。模拟结果符合地质认识,可以定量表征气藏内部的分隔关系,与实际生产测试结果相吻合。
The technique is an effective method for reservoir attribute modeling under the condition of wide spacing.The relations among reservoir physical properties,log responses,seismic attributes are integrated for stochastic modeling using log reconstruction based on forward modeling and collocated cokriging sequential Gauss stimulation technique.Using this method,the porosity model of gas reservoirs of lower II gas group in Second member of Yingge-hai Formation in certain gas field of Yinggehai Basin was built.The result indicates that log reconstruction by forward modeling can obtain a better sonic curve in shallow gas reservoir,and build a better relation between well and seismic attribute.Coordinated coknging simulation can be complete using the wave impedance of seismic inversion constrained by well as the second variable,which will decrease the indeterminacy of stochastic simulation result.The simulation result accords with geologic knowledge and actual production test,and can characterize the separation relationship in gas reservoir quantitatively.
The technique is an effective method for reservoir attribute modeling under the condition of wide spacing.The relations among reservoir physical properties,log responses,seismic attributes are integrated for stochastic modeling using log reconstruction based on forward modeling and collocated cokriging sequential Gauss stimulation technique.Using this method,the porosity model of gas reservoirs of lower II gas group in Second member of Yingge-hai Formation in certain gas field of Yinggehai Basin was built.The result indicates that log reconstruction by forward modeling can obtain a better sonic curve in shallow gas reservoir,and build a better relation between well and seismic attribute.Coordinated coknging simulation can be complete using the wave impedance of seismic inversion constrained by well as the second variable,which will decrease the indeterminacy of stochastic simulation result.The simulation result accords with geologic knowledge and actual production test,and can characterize the separation relationship in gas reservoir quantitatively.
引文
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[2]张树林,温到明,夏斌,等.崖城13-1气田储层三维静态模型建立[J].油气地质与采收率,2005,12(3):10-11,21.
[3]李玉君,邓宏文,田文,等.波阻抗约束下的测井信息在储集层岩相随机建模中的应用[J].石油勘探与开发,2006,33(5):569-571.
[4]廖新维,李少华,朱义清.地质条件约束下的储集层随机建模[J].石油勘探与开发,2004,31(增刊):92-94.
[5]吕晓光,王德发,姜洪福.储层地质模型及随机建模技术[J].大庆石油地质与开发,2000,19(1):10-13.
[6]贾爱林,肖敬修.油藏评价阶段建立地质模型的技术方法[M].北京:石油工业出版社,2002.
[7]尤少燕,时应敏,乔玉雷.利用多尺度资料进行油藏地质建模——以樊124区块为例[J].油气地质与采收率,2005,12(3):15-17.
[8]张学芳,董月昌,慎国强,等.曲线重构技术在测井约束反演中的应用[J].石油勘探开发,2005,32(3):70-72.
[9]杨少虎,黄玉生,彭文绪,等.声波重构技术在储层反演中的应用[J].石油地球物理物探,2006,41(2):171-176.
[10]许正龙.曲线重构技术在储层横向预测工作中的应用[J].石油实验地质,2002,24(4):377-380.
[11]张杨.利用Xu-White模型估算地震波速度[J].成都理工大学学报:自然科学版,2005,32(2):188-195.
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