三维地震资料在密井网区井间储层预测中的应用——以大庆油田PN地区典型区块葡萄花油层为例
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摘要
传统意义上基于测井曲线来预测沉积微相的方法已经不能满足密井网下特高含水阶段剩余油分布和井间砂体的精细预测,如何将密井网开发资料与三维地震资料有机结合进行井间砂体的预测就成为当务之急。以大庆油田PN地区典型区块葡萄花油层为例,利用井震结合的方法进行精细沉积微相展布的研究,以原有相带图井点数据为基础,运用测井曲线确定砂岩类型,根据地震属性和反演结果确定砂岩厚度、宽度和连通性,利用沿层切片确定不同时期发育的河道,以单层有效厚度和孔隙度确定砂体发育方向,其成果在实际生产中得到了较好的验证。
In tradition,the methods based on well log forecast of the sedimentary microfacies could not satisfy the prediction of remaining oil distribution and interwell sand bodies in dense well pattern areas at high water-cut stage.How to integrate the dense well data with 3D seismic data to forecast the interwell sands would be the imperative task.The typical block in the PN Area of Daqing Oilfield was taken for example,the method of wells integrating with seismic data was used for studying the distribution of sedimentary micro-facies.Based on the original point data of the logging curve the sandstone thickness,its width and connectivity are determined according to the seismic attributes,inversion results to obtain the river channel developed at different periods by using of slices along the inversion layer,and to determine the direction of sand-body development of sedimentary facies mapping method based on the single-layer of effective thickness and porosity.The results are proven in actual production.
In tradition,the methods based on well log forecast of the sedimentary microfacies could not satisfy the prediction of remaining oil distribution and interwell sand bodies in dense well pattern areas at high water-cut stage.How to integrate the dense well data with 3D seismic data to forecast the interwell sands would be the imperative task.The typical block in the PN Area of Daqing Oilfield was taken for example,the method of wells integrating with seismic data was used for studying the distribution of sedimentary micro-facies.Based on the original point data of the logging curve the sandstone thickness,its width and connectivity are determined according to the seismic attributes,inversion results to obtain the river channel developed at different periods by using of slices along the inversion layer,and to determine the direction of sand-body development of sedimentary facies mapping method based on the single-layer of effective thickness and porosity.The results are proven in actual production.
引文
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[2]薛林福,王剑,王东坡,等.储层沉积微相带自动跟踪方法[J].石油与天然气地质,2004,25(1):81～92.
[3]张辉,林春明,崔颖凯.三角洲沉积微相特征及其地震识别方法-以委内瑞拉卡拉高莱斯地区为例[J].石油物探,2005,44(6):557～562.
[4]关达,付强.地震解释技术新进展[J].勘探地球物理进展,2003,26(5-6):367～373.
[5]姜素华,王永诗,林红梅,等.测井约束反演技术在不同类型沉积体系中的应用[J].石油物探,2004,43(6):587～590.
[6]陈波,凌云,刘钦甫,等.利用地震属性技术分析储层含油气信息——以塔里木盆地HD4油田为例[J].特种油气藏,2005,12(3):12～15.
[7]倪逸,杨慈珠,郭玲置,等.储层油气预侧中地震属性优选问题探讨[J].石油地球物理勘探,1999,34(6):614～626.
[8]秦月霜,陈显森,王彦辉.用优选后的地震属性参数进行储层预测[J].大庆石油地质与开发,2000,19(6):44～45.
[9]Su J M,Ruan S Y,Wang Y L.Matlab engineering mathematics[M].Beijing:Publishing House of Electronics Industry,2005.110～114.
[10]苏燕,杨愈.密井网区井震结合进行沉积微相研究及储层预测方法探讨——以大庆杏树岗油田杏56区为例[J].地学前缘(中国地质大学(北京);北京大学),2008,15(1):110～112.
[11]许少华,陈可为,梁久祯,等.基于遗传-BP神经网络的沉积微相自动识别[J].大庆石油学院学报,2001,25(1):51～54.
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