东方气田储层非均质性描述
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摘要
东方气田储层非均质性强,对储层砂体叠置情况及其非均质性进行精细刻画对于现场生产有着重要的实用价值。从沉积后地层受重力流冲刷的模式出发,开展储层解释工作,结合属性投影、拟等时切片和高分辨率地震等资料刻画出了各气组的冲沟。通过对泥流冲沟带中储层纵、横向分布规律的认识,描述了造成该气田气层气体组分差异的储层非均质性影响因素。同时选取多项地震属性与孔隙度的多维线性回归,在平面向上预测了各气组的平均孔隙度,对以物性渐变为特点的储层非均质性进行了半定量预测。
Reservoirs in the Dongfang gas field are characterized by complex heterogeneity,thus a fine description of reservoir sand superimposition and their heterogeneity is practical for gas production. Reservoir seismic interpretation is performed based on the model of gravity flow scouring strata after deposition. Attribute projection,pseudo-constant time slice and high resolution seismic data are integrated to describe the gulches in each gas layer. Based on an understanding of the patterns of vertical and lateral reservoir distributions in the solifluctional gulch zone,this paper rationally describes the factors impacting the reservoir heterogeneity that causes gas composition differences in this gas field. Several seismic attributes are selected to predict the average porosity of each gas layer through multi-dimensional linear regression and semi-quantitative predict the reservoir heterogeneity characterized by gradual change of reservoir physical properties.
Reservoirs in the Dongfang gas field are characterized by complex heterogeneity,thus a fine description of reservoir sand superimposition and their heterogeneity is practical for gas production. Reservoir seismic interpretation is performed based on the model of gravity flow scouring strata after deposition. Attribute projection,pseudo-constant time slice and high resolution seismic data are integrated to describe the gulches in each gas layer. Based on an understanding of the patterns of vertical and lateral reservoir distributions in the solifluctional gulch zone,this paper rationally describes the factors impacting the reservoir heterogeneity that causes gas composition differences in this gas field. Several seismic attributes are selected to predict the average porosity of each gas layer through multi-dimensional linear regression and semi-quantitative predict the reservoir heterogeneity characterized by gradual change of reservoir physical properties.
引文
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[2]龚隐贤,李解民.用道积分法进行砂层及油气砂层预测[J].海洋石油,2000(4):15-16.
[3]DOYE P M,周培军.根据地震信息求取孔隙度的地质统计法[J].四川石油普查,1989(2):81-93.
[4]周家雄,王立峰,马光克,等.东方气田储层孔隙度横向预测[J].中国海上油气,2004,16(6):369-372.
[5]王永红,周正南,张书法.利用地震和测井资料估算孔隙度[J].石油地球物理勘探,1990,25(5):572-577.
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