卫星油田PⅠ层组基于砂体发育的地震反射模式
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摘要
卫星油田PⅠ层组为该油田的主力油层组,层组内单砂层厚度较薄、空间连续性差。将PⅠ层组纵向上划分为上、中、下3个组合单元,利用地震波形能够给以较好的反映。测井曲线具备好的沉积微相识别能力,将每个单元里存在河道或河坝砂体定义为砂体发育,不存在的定义为互层发育,考察卫星油田三维地震工区近100口井资料识别的沉积微相与地震波形的对应关系,建立8种地震波砂体反射模式,依据模式可有效推测出卫星油田PⅠ层组勘探空白区的砂体发育状况,为该油田部署有利井位提供技术支撑。
Bed set PⅠ is the main reservoir group in the Weixing Oilfield,characterized by thin thickness of single sand layer and poor spatial continuity.Bed set PⅠ can be divided into 3 composite units,which can be well reflected by the seismic wave shape.Well logs have perfect identification capacity for sedimentary micro-facies.The unit with channel or river dam sand body is defined as sand body development,and that without channel or river dam sand body is assigned to interbed development.The authors investigated the corresponding relationship between sedimentary micro-facies identified by well log data of 100 wells in 3D survey of the Weixing Oilfield and the seismic wave shape and,on such a basis,established 8 types of sand body reflection mode of seismic wave.According to the mode,sand body development can be derived for the exploration blank area of Bed set PⅠ of the Weixing Olilfield.The results provide technological support for the deployment of favorable well locations.
Bed set PⅠ is the main reservoir group in the Weixing Oilfield,characterized by thin thickness of single sand layer and poor spatial continuity.Bed set PⅠ can be divided into 3 composite units,which can be well reflected by the seismic wave shape.Well logs have perfect identification capacity for sedimentary micro-facies.The unit with channel or river dam sand body is defined as sand body development,and that without channel or river dam sand body is assigned to interbed development.The authors investigated the corresponding relationship between sedimentary micro-facies identified by well log data of 100 wells in 3D survey of the Weixing Oilfield and the seismic wave shape and,on such a basis,established 8 types of sand body reflection mode of seismic wave.According to the mode,sand body development can be derived for the exploration blank area of Bed set PⅠ of the Weixing Olilfield.The results provide technological support for the deployment of favorable well locations.
引文
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[6]陆基孟.地震勘探原理(下册)[M].东营,中国石油大学出版社,2006:1-37.
[7]单敬福,王峰,孙海雷,等.基于地震波阻抗反演的小层砂体预测技术[J].石油与天然气地质,2010,31(2):212-218.
[8]王东林,王怀忠,郑振英,等.孔南地区沙河街组多参数地震属性分析与砂体分布预测[J].天然气地球科学,2010,21(4):678-682.
[9]唐小彪.基于对应分析的支持向量机回归在地震储层厚度预测中的应用[J].物探与化探,2009,33(4):468-471.
[10]Cross T A.Stratigraphic controls on reservoir attributes in continen-tal strata[J].Earth Science Frontier,2000,7(4):322-350.
[11]于兴河,王德法.陆相断陷盆地三角洲相构形要素及其储层地质模型[J].地质论评,1997,43(3):226-231.
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