确定性反演和随机反演对井约束条件的需求分析
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摘要
叠后数据地震反演一般利用测井信息对反演结果进行约束,不同的反演方法对井约束条件的需求存在差异,不恰当地使用井约束条件将严重影响反演结果的准确性。基于理论数据分析了确定性反演和随机反演中多井约束对反演精度的影响。研究表明,在确定性反演中,多井约束将导致反演结果可信度降低,相比多井约束的反演结果,单井约束更能准确描绘出相对阻抗差异;在随机反演中,约束井数目越多,不确定性越低,反演精度越高。
During the seismic inversion of post-stack datalogging data is usually used to constrain the inversion result.Different inversion methods require different well-constrained conditions,and inappropriate application of well-constrained conditions will seriously impact the accuracy of inversion.By utilizing synthetic data,we analyzed the impact of multi-well constrained conditions on deterministic inversion and stochastic inversion.The results indicate that in deterministic inversion,multi-well constrained conditions will decrease the reliability of inversion,and single-well constrained condition can accurately reflect the contrast of relative impedance;in stochastic inversion,more constrained wells cause lower uncertainty and higher inversion accuracy.
During the seismic inversion of post-stack datalogging data is usually used to constrain the inversion result.Different inversion methods require different well-constrained conditions,and inappropriate application of well-constrained conditions will seriously impact the accuracy of inversion.By utilizing synthetic data,we analyzed the impact of multi-well constrained conditions on deterministic inversion and stochastic inversion.The results indicate that in deterministic inversion,multi-well constrained conditions will decrease the reliability of inversion,and single-well constrained condition can accurately reflect the contrast of relative impedance;in stochastic inversion,more constrained wells cause lower uncertainty and higher inversion accuracy.
引文
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[3]刘海飞,阮百尧,柳建新,等.混合范数下的最优化反演方法[J].地球物理学报,2007,50(6):1877-1883
[4]姚逢昌,甘利灯.地震反演的应用与限制[J].石油勘探与开发,2000,27(2):53-56
[5]张永刚.地震波阻抗反演技术的现状和发展[J].石油物探,2002,41(4):385-390
[6]凌云,惠晓宇,孙德胜,等.薄储层叠后反演影响因素分析与地震属性解释研究[J].石油物探,2008,47 (6):531-538
[7]谢月芳.平湖油气田放鹤亭构造平湖组储层精细反演[J].石油物探,2008,47(6):588-592
[8]曹丹平,印兴耀,张繁昌,等.连井井间地震资料反演中的关键问题分析[J].石油物探,2008,47(5): 455-460
[9]马劲风,王学军,谢言光.波阻抗反演中低频分量构建的经验与技巧[J].石油物探,2000,39(1):27-34
[10]印兴耀,刘永社.储层建模中地质统计学整合地震数据的方法及研究进展[J].石油地球物理勘探,2002, 37(4):423-430
[11]聂凯轩,李承楚,王宏林,等.地震测井资料综合预测办法——随机顺序指示条件模拟研究与应用[J].石油地球物理勘探,1997,32(6):842-851
[12]王家华,张团峰.油气储层随机建模[M].北京:石油工业出版社,2001:1-187
[13]侯景儒.实用地质统计学[M].北京:地质出版社, ??1992:1-200
[14]孙思敏,彭仕宓.基于模拟退火算法的地质统计学反演方法[J].石油地球物理勘探,2007,42(1):38-43
[15]苏云,李录明,钟峙,等.随机反演在储层预测中的应用[J].煤田地质与勘探,2009,37(6):63-66
[16]Deutsch C V,Andre G.GSLIB:Geostatistical Software Library and User's Guide[M].Oxford,USA: Oxford University Press,1998:1-352
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