基于地震解释砂体单元的储层数字地质建模
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摘要
根据地层层序发育特点,在等时地层格架内创建了构造模型,并以地震解释的单个砂体为对象,确定性地创建对应于每个砂体单元的砂体结构模型;通过建立单砂体单元的层速度场,提取每个单砂体单元地震属性体,并分别应用其层速度场进行时深转换;在砂体结构模型基础之上,应用协模拟技术,雕刻砂体内部的属性分布特征。研究表明:应用该思路建立储层数字地质模型,可以充分反映每个地震解释的砂体构型;为复杂油气田单砂体单元的时深转换提供了解决方法;应用进行时深转换的地震属性体和井点参数,采用随机模拟方法进行储层属性模拟,可以充分地反映储层内部非均质性,雕刻隔夹层的分布。该建模方法与思路能较好地生成等时地层格架下的地震解释砂体单元模型,并描述其内部的非均质程度。
According to sequence stratigraphy's development character, the structural model is established within isochronal formation frame and sandbody structural model corresponding to each unit, taking a single sandbody traced by seismic interpretation as an objective, is also built up definitely. By building horizon velocity field of single sandbody unit, seismic attributes of single sandbody is extracted and applied into its horizon velocity field to make time depth conversion respectively.Attribution distribution within sandbody is reflected by using co-simulation technology based on the structural model of single sandbody. It is shown by research that stochastic model built in this way mentioned above can fully reflect sandbody structure traced by seismic interpretation and provide solution to time depth conversion of single body in complicated oil and gas fields; that heterogeneity within reservoir, barrier distribution and interbed distribution can be also fully reflected by adopting seismic attribution after time depth conversion and well parameters and simulating reservoir attribution through stochastic modeling method. This modeling method and its way can form better sandbody unit models based on seismic interpretation within isochronal formation frame and describe heterogeneity within it.
According to sequence stratigraphy's development character, the structural model is established within isochronal formation frame and sandbody structural model corresponding to each unit, taking a single sandbody traced by seismic interpretation as an objective, is also built up definitely. By building horizon velocity field of single sandbody unit, seismic attributes of single sandbody is extracted and applied into its horizon velocity field to make time depth conversion respectively.Attribution distribution within sandbody is reflected by using co-simulation technology based on the structural model of single sandbody. It is shown by research that stochastic model built in this way mentioned above can fully reflect sandbody structure traced by seismic interpretation and provide solution to time depth conversion of single body in complicated oil and gas fields; that heterogeneity within reservoir, barrier distribution and interbed distribution can be also fully reflected by adopting seismic attribution after time depth conversion and well parameters and simulating reservoir attribution through stochastic modeling method. This modeling method and its way can form better sandbody unit models based on seismic interpretation within isochronal formation frame and describe heterogeneity within it.
引文
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[2]沈章洪,梁雪梅,田立新.随机模拟技术在QHD32-6油田油藏地质模型随钻调整中的应用[J].中国海上油气:地质,2001,13(6):105-108.
[3]凌云,孙德胜,高军,等.基于三维地震数据体的准层序组内沉积体的解释研究[J].石油物探,2005,44(6):568-577.
[4]王永刚,乐友喜.综合地球物理信息的孔隙率预测方法及应用效果分析[J].石油地球物理勘探,2001,26(3):26-29.
[5]李少华,张昌民,王振奇,等.三角洲前缘砂体骨架的随机模拟[J].石油勘探与开发,2004,31(1):67-69.
[6]郑荣才,彭军,吴朝容.陆相盆地基准面旋转回的级次划分和研究意义[J].沉积学报,2001,19(2):249-254.
[7]张尚锋,洪秀娥,郑荣才,等.应用高分辨率层序地层学对储层流动单元层次性进行分析[J].成都理工学院学报,2002,29(2):147-151.
[8]张永华,杨道庆,孙耀华,等.高精度层序地层学在隐蔽油藏预测中的应用[J].石油物探,2007,46(4):378-383.
[9]叶泰然,郑荣才.川西坳陷须二段层序地层特征及储层预测[J].天然气工业,2004,24(11):45-48.
[10]吕晓光.深度开发油田确定性与随机建模结合的相控建模[J].石油学报,2004,25(5):60-64.
[11]王家华,张团峰.油气储层随机建模[M].北京:石油工业出版社,2001:52-64.
[12]JEFFREY.随机建模和地质统计学[M].北京:石油工业版社,2000:104-114.
[13]崇仁杰,孙立春,胡光义,等.随机模拟预测夹层分布方法在平湖油气田的应用[J].中国海上油气:地质,2002,16(1):36-40.
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