多参数拟合测井曲线环境校正方法研究及应用
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摘要
以地震反演为核心的储层预测技术在西湖凹陷的勘探中发挥着重要作用,而测井和地震等基础资料的质量是影响地震反演效果的关键因素。凹陷中的探井,受地质条件、钻井工艺等因素的限制,井眼条件差,从而造成反演必须的声波和密度曲线失真。针对这个问题,在分析声波、密度等曲线与自然伽马、中子等曲线相关性的基础上,提出了多参数拟合重构的校正方法,并进行了合理性验证。校正后的曲线,其井震标定和反演效果都得到了改善,证明了该方法的有效性。
The reservoir prediction technique based on seismic inversion plays an important role in the exploration of Xihu Sag.The quality of primary data,such as seismic data,well logs is the key to the quality of seismic inversion.However,limited by the geology conditions and drilling technique,the borehole enlargement often occurs during drilling,which makes the sonic and density curve distortion.Therefore,it is necessary to conduct environmental calibration before inversion.Based on the analysis of the relationship between the sonic,density curves and other curves such as Gamma Ray,neutron porosity,a multi-parameter simulation calibration method is established.The calibration rationality is verified,and the quality of well-seismic correlation and seismic inversion are improved after applications of the calibrated curves,which proved that this method is effective.
The reservoir prediction technique based on seismic inversion plays an important role in the exploration of Xihu Sag.The quality of primary data,such as seismic data,well logs is the key to the quality of seismic inversion.However,limited by the geology conditions and drilling technique,the borehole enlargement often occurs during drilling,which makes the sonic and density curve distortion.Therefore,it is necessary to conduct environmental calibration before inversion.Based on the analysis of the relationship between the sonic,density curves and other curves such as Gamma Ray,neutron porosity,a multi-parameter simulation calibration method is established.The calibration rationality is verified,and the quality of well-seismic correlation and seismic inversion are improved after applications of the calibrated curves,which proved that this method is effective.
引文
[1]伊振林,吴胜和,张保国,等.一种新的测井曲线环境校正方法——在平湖油气田中的应用[J].地质勘探,2010,30(1):39-41.
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[3]Calderon J,Castagna J.Porosity and lithologic estimation using rock physics and multi-attribute transforms in Balcon Field,Colombia[J].The Leading Edge,2007,26(2):142-150.
[4]Pramanik A.,Singh V,Vig R,et al.Estimation of effective porosity using geostatistics and multi-attribute transforms:a case study[J].Geophysics,2004,69(2):352-372.
[5]Russell B,Hampson D,Todorov T,et al.Combining Geostatistics&Multi-Attribute Transforms:A Channel Sand Case Study[J].Journal of Petroleum Geology,2002,25(1):97-117.
[6]Sukmono S.Application of multi-attribute analysis in mapping lithology and porosity in the Pematang--Sihapas groups of Central Sumatra Basin,Indonesia[J].The Leading Edge,2007,26(2):126-131.
[2]Hampson D,Schuelke J,Quirein J.Use of multi-attribute transforms to predict log properties from seismic data[J].Geophysics,2001,66(1):220-236.
[3]Calderon J,Castagna J.Porosity and lithologic estimation using rock physics and multi-attribute transforms in Balcon Field,Colombia[J].The Leading Edge,2007,26(2):142-150.
[4]Pramanik A.,Singh V,Vig R,et al.Estimation of effective porosity using geostatistics and multi-attribute transforms:a case study[J].Geophysics,2004,69(2):352-372.
[5]Russell B,Hampson D,Todorov T,et al.Combining Geostatistics&Multi-Attribute Transforms:A Channel Sand Case Study[J].Journal of Petroleum Geology,2002,25(1):97-117.
[6]Sukmono S.Application of multi-attribute analysis in mapping lithology and porosity in the Pematang--Sihapas groups of Central Sumatra Basin,Indonesia[J].The Leading Edge,2007,26(2):126-131.
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