马尔可夫链蒙特卡罗模拟在储层反演中的应用
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摘要
马尔可夫链蒙特卡罗(MCMC)方法是一种基于全局最优化技术进行地质统计学求解的方法。综合考虑地震数据、测井数据、岩性数据,对波阻抗、岩性概率分布的马尔科夫链进行蒙特卡罗模拟,从初始模拟结果出发,利用MCMC算法,模拟出多个波阻抗曲线,通过合成地震记录与实际地震记录剖面相关性,确定合理的储层参数,反演出空间上的波阻抗体及岩性体。最重要的质控手段是抽井检验,以保证模型的稳定性。MCMC方法在大芦湖油田樊18-3区块沙三中、沙三下亚段浊积砂体储层预测中取得了良好的效果。
The method of Monte Carlo Simulation of Markov Chain(MCMC) was a kind of geostatistical method containing multi-information and mainly based on the global optimum taking account of seismic data,logging,lithological data and probability distribution concerning AI and lithology. Starting from the preliminary simulation result,the MCMC method simulated several AI curves,and got the reasonable reservoir parameters by means of the correlation between synthetic seismogram and seismic section. The inversion of the AI and lithologic cube are obtained. The most important means of quality controlling is the inspection of selected well to guarantee the stability of the model. The method of MCMC performs better in the application of the reservoir prediction of turbidity sand body in the middle and lower members of Es3 Block Fan 18-3 of Daluhu Oilfield.
The method of Monte Carlo Simulation of Markov Chain(MCMC) was a kind of geostatistical method containing multi-information and mainly based on the global optimum taking account of seismic data,logging,lithological data and probability distribution concerning AI and lithology. Starting from the preliminary simulation result,the MCMC method simulated several AI curves,and got the reasonable reservoir parameters by means of the correlation between synthetic seismogram and seismic section. The inversion of the AI and lithologic cube are obtained. The most important means of quality controlling is the inspection of selected well to guarantee the stability of the model. The method of MCMC performs better in the application of the reservoir prediction of turbidity sand body in the middle and lower members of Es3 Block Fan 18-3 of Daluhu Oilfield.
引文
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[2]史会峰,谷根代,姜波.基于MCMC算法贝叶斯网络的学习[J].华北电力大学学报,2004,(04):109~112.
[3]张建林,吴胜和,武军昌,等.应用随机模拟方法预测岩性圈闭[J].石油勘探与开发,2003,30(3):114~116.
[4]刘百红,李建华,魏小东,等.随机反演在储层预测中的应用[J].地球物理学进展,2009,24(2):581~589.
[5]许辉群,桂志先.利用测井约束地震反演预测砂体展布[J].石油天然气学报,2006,28(3):547~551.
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