SELECTION OF PARAMETERS AND RELIABILITY ANALYSIS OF RESULTS IN GEOSTATISTICAL INVERSION METHOD
DONG Qi1,2, LU Shuang-fang1,2, ZHANG Xue-juan1,2, SHANG Jiao-hui1,2
1. College of Geosciences, Northeast Petroleum University, Daqing 163318, China;
2. Provincial Key Lab of Petroleum Accumulation Mechanism and Resource Prediction, Daqing 163318, China
Geo-statistical inversion method based on stochastic modeling techniques has high vertical resolution prediction results,but its results show high randomness.Therefore,reliability evaluation of the inversion results is very important.By using geo-statistics method and through setting up different inversion parameters,the authors compared the inversion results and,in combination with geological regularity,selected the optimal inversion parameters to predict thin bedded alternation sand body of SⅡ and SⅢ reservoir group in the development zone of northern Saertu oil field and analyzed the reliability of the inversion results qualitatively and quantitatively based on forward modeling.The results show that rational sampling rate of initial framework,reasonable well density of inversion,and variogram parameters in accord with geological conditions constitute necessary conditions for efficient inversion work and reliable inversion results.
[1] 何火华,李少华,杜家元,等.利用地质统计学反演进行薄砂体储层预测[J].物探与化探,2011,12:35(6):804～808.[2] 李方明,计智锋,赵国良,等.地质统计反演之随机地震反演方法[J].石油勘探与开发,2007,34(4):451～455.[3] Dubrule O,Thibaut M,Lamy P,et al.Geostatistical reservoir aracterization constrained by 3D seismic data[J].Petreleum Science,1988,4(2):30～35.[4] Haa S A, Dubrule O G.Eostatistical inversion-A sequential method for stochastic reservoir modeling constrained by seismic data[J].First Break,1994,13(12):25～28.[5] Rothman D H.Geostatistical inversion of 3D seismic data for thin sand delineation[J].Geophysics,1988,51(2):332～339.[6] 秦月霜,郭海晓,陈友福.变差函数对地震反演精度的影响[J].大庆石油学院学报,2009,10,33(5):37～39.[7] 王家华,刘倩.储层建模中对变差函数分析的几点认识[J].石油化工应用,2011,10,30(10):5～7.[8] 慎国强,孟宪军,王玉梅,等.随机地震反演方法及其在埕北35井区的应用[J].石油地球物理勘探,2004,2,39(1):75～81.[9] 刘兴冬.随机反演变差函数适用性研究[J].石油天然气学报,2010,4,32(2):253～256.[10] 李方明,计智锋,赵国良,等.地质统计反演之随机地震反演方法—以苏丹M 盆地P油田为例[J].石油勘探与开发,2007,34(4):451～455.[11] 边树涛,狄帮让,董艳蕾,等.地质统计反演在东濮凹陷白庙气田沙三段储层预测中的应用[J].石油地球物理勘探,2011,6,45(3):399～405.
