叠前地震反演技术在苏里格地区的应用
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摘要
苏里格气田主要储集层为盒8段辫状河河道砂岩,其砂体横向变化快,含气层与围岩的纵波阻抗差小,预测困难。岩石物理分析表明,纵横波速度比(vp/vs)、泊松比(σ)和λρ等3个弹性参数能够反映地层的含油气性信息。在横波预测的基础上,对苏里格地区进行了叠前地震反演,取得了很好的应用效果,为该区含油气性预测提供了依据。
The main reservoir in the Sulige gas field lies in the sandstone of the Segment He8 braided river channel.The sand body varies quickly in lateral direction,and it is difficult to predict for little difference of impedance between gas-bearing bed and surrounding rocks.According to petrophysical analysis,some elastic parameters such as P-S velocity ratio,Poisson ratio,λρ could reflect the informations about hydrocarbons in the formation.Based on the S-wave prediction,we carried out pre-stack seismic inversion in the Sulige district and gained good results which provides an important method for the hydrocarbon-bearing prediction in this area.
The main reservoir in the Sulige gas field lies in the sandstone of the Segment He8 braided river channel.The sand body varies quickly in lateral direction,and it is difficult to predict for little difference of impedance between gas-bearing bed and surrounding rocks.According to petrophysical analysis,some elastic parameters such as P-S velocity ratio,Poisson ratio,λρ could reflect the informations about hydrocarbons in the formation.Based on the S-wave prediction,we carried out pre-stack seismic inversion in the Sulige district and gained good results which provides an important method for the hydrocarbon-bearing prediction in this area.
引文
[1]郭晓龙,欧阳永林,耿晶.鄂尔多斯盆地苏里格气田地震转换波解释[J].天然气地球科学,2005,16(5):650-653.
[2]宁宁,陈孟晋,刘锐娥,等.鄂尔多斯盆地东部上古生界石英砂岩储层成岩及孔隙演化[J].天然气地球科学,2007,18(3):334-338.
[3]欧阳永林,杨池银.用常规及近、远道叠加剖面识别气层——以鄂尔多斯盆地苏里格庙气田盒8储层为例[J].天然气地球科学,2003,14(4):287-290.
[4]樊长江,王贤,邓宏文,等.地震反演中储层表征的对策和思路[J].天然气地球科学,2006,17(4):543-546.
[5]Fred J.Hiltermen.地震振幅解释[M].孙夕平,赵良武译.北京:石油工业出版社,2006:25-35,68-71,99-100.
[6]徐伯勋,白旭滨.地震勘探信息技术:提取、分析、预测[M].北京:地质出版社,2001:51-55.
[7]石玉梅.弹性参数在岩性油气藏勘探中的应用——以苏里格气田为例[J].中国石油勘探,2006,11(4):80-84.
[8]Dai Xiaofeng,Gan Lideng,Du Wenhui.Application of joint e-lastic i mpedance inversionin the GD Oilfield[J].Applied Geo-physics,2006,3(1):37-41.
[2]宁宁,陈孟晋,刘锐娥,等.鄂尔多斯盆地东部上古生界石英砂岩储层成岩及孔隙演化[J].天然气地球科学,2007,18(3):334-338.
[3]欧阳永林,杨池银.用常规及近、远道叠加剖面识别气层——以鄂尔多斯盆地苏里格庙气田盒8储层为例[J].天然气地球科学,2003,14(4):287-290.
[4]樊长江,王贤,邓宏文,等.地震反演中储层表征的对策和思路[J].天然气地球科学,2006,17(4):543-546.
[5]Fred J.Hiltermen.地震振幅解释[M].孙夕平,赵良武译.北京:石油工业出版社,2006:25-35,68-71,99-100.
[6]徐伯勋,白旭滨.地震勘探信息技术:提取、分析、预测[M].北京:地质出版社,2001:51-55.
[7]石玉梅.弹性参数在岩性油气藏勘探中的应用——以苏里格气田为例[J].中国石油勘探,2006,11(4):80-84.
[8]Dai Xiaofeng,Gan Lideng,Du Wenhui.Application of joint e-lastic i mpedance inversionin the GD Oilfield[J].Applied Geo-physics,2006,3(1):37-41.
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