牛庄洼陷浊积岩砂体储层物性地震预测
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摘要
对牛庄洼陷沙三段已知浊积砂体的岩石物性和地震属性进行统计、回归等分析,研究表明:①牛庄洼陷沙 三段不同岩性的速度具有一定差异,灰质砂岩速度最高,砂岩速度次之,泥岩速度最低;②反射振幅值太强和太 弱的浊积砂体,其储层物性都不好,根据其反射振幅值可定性地判断砂体储层物性;③全区难以确定统一的地 震属性与储层参数的对应关系,但同一个砂体,影响其反射振幅变化的外在因素基本相同,可应用回归经验公 式对其物性进行定量计算;④在利用地震属性预测储层物性时,不能片面、盲目地追求预测方法和计算模型的 普适性。
Statistic and regressive analyses have been carried out for petrophysical character and seismic attributes of known turbidite sand body in Es3 of Niuzhuang sub-sag. The studied results showed:(1) the velocities of different lithology in Es3 of Niuzhuang sub-sag are different, the velocity of carbonic sandstone is the highest,sandstone is second and mudstone is the lowest; (2)the physical property of reservoir is bad for turbidite sand body characterized by very strong and very weak reflection amplitude,so that the physical property of reservoir could be identified qualitatively by reflection amplitude; (3) the corresponding unitary relationship between seismic attributes and reservoir parameters is difficult to be defined in total area,but external factors affected variation of reflection amplitude are basically same for same sand body,so that the regressive experimental formula can be used for quantitative calculation of physical property;(4)it can't unilaterally and blindly seek the general adaptability of predicting methods and calculating models when using seismic attributes to predict the physical property of reservoir.
Statistic and regressive analyses have been carried out for petrophysical character and seismic attributes of known turbidite sand body in Es3 of Niuzhuang sub-sag. The studied results showed:(1) the velocities of different lithology in Es3 of Niuzhuang sub-sag are different, the velocity of carbonic sandstone is the highest,sandstone is second and mudstone is the lowest; (2)the physical property of reservoir is bad for turbidite sand body characterized by very strong and very weak reflection amplitude,so that the physical property of reservoir could be identified qualitatively by reflection amplitude; (3) the corresponding unitary relationship between seismic attributes and reservoir parameters is difficult to be defined in total area,but external factors affected variation of reflection amplitude are basically same for same sand body,so that the regressive experimental formula can be used for quantitative calculation of physical property;(4)it can't unilaterally and blindly seek the general adaptability of predicting methods and calculating models when using seismic attributes to predict the physical property of reservoir.
引文
[1]夏雷,朱应科,高平．饱和勘探区储层描述方法．见:韩 文功,陈建平主编．胜利油气地球物理技术论文集．北 京:石油工业出版社,2003,150-155
[2] 王捷．油藏描述技术:勘探阶段．北京:石油工业出版 社,1996,364-377
[3]史松群,赵玉华．苏里格气田低阻砂岩储层的含气性预 测研究．石油地球物理勘探,2003,38(1):77-83
[4] 马如辉,张平．利用波阻抗反演预测地层孔隙率．石油 地球物理勘探,2002,37(5):537-540
[5]李艳丽,王国军等．针对火山岩预测的目标处理与火山 岩储层预测新技术．石油地球物理勘探．2002,37(5): 541-546
[2] 王捷．油藏描述技术:勘探阶段．北京:石油工业出版 社,1996,364-377
[3]史松群,赵玉华．苏里格气田低阻砂岩储层的含气性预 测研究．石油地球物理勘探,2003,38(1):77-83
[4] 马如辉,张平．利用波阻抗反演预测地层孔隙率．石油 地球物理勘探,2002,37(5):537-540
[5]李艳丽,王国军等．针对火山岩预测的目标处理与火山 岩储层预测新技术．石油地球物理勘探．2002,37(5): 541-546
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