融合地震和测井信息的三角洲沉积微相随机建模研究——以扶余油田二夹五区块为例
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摘要
小型三角洲沉积储层厚度薄,砂体的规模小,侧向变化快,主要以砂泥岩间互的形式出现.利用三维地震资料具有覆盖面广和采集密度大的优点,以沃尔索相律和沉积微相与地震波阻抗之间的概率关系作为约束,应用序贯指示模拟结合同位协同克里金的方法融合地震和测井信息,建立了三角洲沉积微相的地质模型.实践结果证实,该方法能够对相变较快的三角洲沉积井间沉积微相的不确定性进行表征,提高了模型预测的可靠性.
Small-scale delta sediment has some characters as follows:its reservoir is thin,its sand-body scale is small,its lateral facies variation is quick,and it is mainly composed of laterally intervallic sand-rock layers and mud-rock layers.The stochastic geologic model of deltaic sedimentary microfacies is established,in which seismic information is integrated with logging information by combining sequential indicating simulation method with collocated co-Kriging method and the probability relationship between Walther phase rule and sedimentary microfacies and seismic impedance is as constraint.The modeling method utilizes the advantages of the broad coverage and high acquisition density of 3D seismic data.The practice proves that the modeling can well characterize the uncertainty of the interwell delta microfacies of the delta sediments of the quick lateral facies variation,which enhances the reliability of model forecast.
Small-scale delta sediment has some characters as follows:its reservoir is thin,its sand-body scale is small,its lateral facies variation is quick,and it is mainly composed of laterally intervallic sand-rock layers and mud-rock layers.The stochastic geologic model of deltaic sedimentary microfacies is established,in which seismic information is integrated with logging information by combining sequential indicating simulation method with collocated co-Kriging method and the probability relationship between Walther phase rule and sedimentary microfacies and seismic impedance is as constraint.The modeling method utilizes the advantages of the broad coverage and high acquisition density of 3D seismic data.The practice proves that the modeling can well characterize the uncertainty of the interwell delta microfacies of the delta sediments of the quick lateral facies variation,which enhances the reliability of model forecast.
引文
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[2]吕小光,姜彬.密井网条件下的储层确定性建模技术研究[J].大庆石油地质与开发,2001,20(5):26-32.
[3]王仲林,徐守余.河流相储集层定量建模研究[J].石油勘探与开发,2003,30(1):75-78.
[4]吴胜和,刘英,范峥,等.应用地质和地震信息进行三维沉积微相建模[J].古地理学报,2003,5(4):439-449.
[5]孙思敏,彭仕宓.地质统计学反演方法及其在薄层砂体预测中的应用[J].西安石油大学学报:自然科学版,2007,22(1):41-44.
[6]李玉君,邓宏文,田文,等.波阻抗约束下的测井信息在储集层岩相随机建模中的应用[J].石油勘探与开发,2006,33(5):569-571.
[7]张庆国,鲍志东,郭雅君,等.扶余油田扶余油层的浅水三角洲沉积特征及模式[J].大庆石油学院学报,2007,31(3):4-7.
[8]廖新维,李少华,朱义清.地质条件约束下的储集层随机建模[J].石油勘探与开发,2004,31(增刊):92-94.
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[10]刘文龄,夏海英.同位协同克里金方法在储层横向预测中的应用[J].勘探地球物理进展,2004,27(5):367-370.
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