基于地震约束的地质统计学建模方法研究
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摘要
地质统计学建模技术是近几年发展起来的一项高新技术,是当今油藏描述的一个重要组成部分。它可以实现油气储层的精细描述和建模,定量表征和刻画储集层各种尺度的非均质性,从而研究油气勘探和开发中的不确定性和投资风险。储层建模技术在参数估计、储层非均质性描述、储层特征的不确定性描述以及综合利用各种资料方面具有很强的优势。基于地震数据的地质统计学建模的多点统计学方法,可以增加模型的井间确定性信息,降低因数学插值和模拟带来的井间不确定性,提高模型忠实于地下实际情况的程度。主要体现在:①地震数据作为第二变量或趋势约束条件参与建模计算,能够约束井间插值、外推和模拟;②增加随机建模中的确定性因素,减少模型的不确定性,使得随机建模具有确定性的趋向。
Geostatistical modeling is a new technique being developed in recent years and it is an important part of modern reservoir description.The technique can realize fine reservoir description and modeling and quantitatively characterize and describe reservoir heterogeneity in different scales,and uncertainty and investment risk in oil and gas exploration and development can be studied.Reservoir modeling technique has great advantages in parameter estimation,reservoir heterogeneity description,uncertainty description of reservoir characterization and comprehensive use of various data. Geostatistical modeling method based on the seismic constraint can increase interwell certain information,decrease interwell uncertainty caused by mathematical interpolation and simulation and improve the modeling precision according to the actual situation of the reservoir,which reflect in two respects:seismic data as secondary variable or constraint in modeling calculation can constrain interwell interpolation,extrapolation and simulation;it can increase certainty factors in stochastic modeling,decrease uncertainty of modeling and make stochastic modeling has a certain trend.
Geostatistical modeling is a new technique being developed in recent years and it is an important part of modern reservoir description.The technique can realize fine reservoir description and modeling and quantitatively characterize and describe reservoir heterogeneity in different scales,and uncertainty and investment risk in oil and gas exploration and development can be studied.Reservoir modeling technique has great advantages in parameter estimation,reservoir heterogeneity description,uncertainty description of reservoir characterization and comprehensive use of various data. Geostatistical modeling method based on the seismic constraint can increase interwell certain information,decrease interwell uncertainty caused by mathematical interpolation and simulation and improve the modeling precision according to the actual situation of the reservoir,which reflect in two respects:seismic data as secondary variable or constraint in modeling calculation can constrain interwell interpolation,extrapolation and simulation;it can increase certainty factors in stochastic modeling,decrease uncertainty of modeling and make stochastic modeling has a certain trend.
引文
[1]刘文玲.地震约束储层地质建模技术[J].石油学报,2008,29(1):64.
[2]于兴河,陈建阳,张志杰,等.油气储层相控随机建模技术的约束方法[J].地学前缘,2005, 12(3):237-243.
[3]李黎,王永刚.地质统计学应用综述[J].勘探地球物理进展, 2006,29(3):163-166.
[6]吴胜和,李文克.多点地质统计学—理论应用与展望[J].古地理学报,2005,7(1):137-143.
[4]Doyen.Seismic Reservoir Characterization [M].EAGE,2007.
[2]于兴河,陈建阳,张志杰,等.油气储层相控随机建模技术的约束方法[J].地学前缘,2005, 12(3):237-243.
[3]李黎,王永刚.地质统计学应用综述[J].勘探地球物理进展, 2006,29(3):163-166.
[6]吴胜和,李文克.多点地质统计学—理论应用与展望[J].古地理学报,2005,7(1):137-143.
[4]Doyen.Seismic Reservoir Characterization [M].EAGE,2007.
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