歧口凹陷港西地区浅层气的AVO检测方法
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摘要
首次利用三维高分辨率地震AVO技术分析了港西油田浅层新近系明化镇组的含气响应特征,先通过AVO正演模拟研究了含气储层的AVO异常响应特征,并以此为依据指导对基于叠前地震资料反演AVO异常属性的解释。然后基于叠前地震资料进行AVO反演,提取AVO异常属性参数,基于各种属性特征来预测储层的分布和含气性状况,并通过相关性对属性进行优化,分析了其多解性。该方法可以指导对港西大范围含气性进行可靠的预测,对提高港西浅层气藏的勘探与开发具有较大的实际意义。
Gangxi oilfield is rich in shallow gas resources in Neogene,and its g as reservoirs are characterized by shallow buried depth,complex origins,small reserves,many types and wide distribution.In this paper,the three-dimensional high-resolution seismic AVO technology was used for the first time to analyse t he gas response characteristics in Minghuazhen Formation of Gangxi shallow layer s.At first,based on the pre-stack seismic data,the gas-bearing reservoir is s tudied in response to the abnormal characteristics of the AVO through the AVO fo rward model,and used as the basis for inversion AVO anomalies to explain the pr operties.Then,based on pre-stack seismic data,AVO inversion is proceeded,and AVO abnormal attribute parameters are extracted.Finally,based on attributes c haracteristics,prediction is made for the distribution of reservoir and gas-bea ring status,and the attributes are optimized by correlation calculation to anal yze the ambiguity.Thereby,this can offer guidance for a reliable gas forecasti ng in Gangxi block.It has great practical significance for improving the explor ation and development of shallow gas pool in Gangxi block.
Gangxi oilfield is rich in shallow gas resources in Neogene,and its g as reservoirs are characterized by shallow buried depth,complex origins,small reserves,many types and wide distribution.In this paper,the three-dimensional high-resolution seismic AVO technology was used for the first time to analyse t he gas response characteristics in Minghuazhen Formation of Gangxi shallow layer s.At first,based on the pre-stack seismic data,the gas-bearing reservoir is s tudied in response to the abnormal characteristics of the AVO through the AVO fo rward model,and used as the basis for inversion AVO anomalies to explain the pr operties.Then,based on pre-stack seismic data,AVO inversion is proceeded,and AVO abnormal attribute parameters are extracted.Finally,based on attributes c haracteristics,prediction is made for the distribution of reservoir and gas-bea ring status,and the attributes are optimized by correlation calculation to anal yze the ambiguity.Thereby,this can offer guidance for a reliable gas forecasti ng in Gangxi block.It has great practical significance for improving the explor ation and development of shallow gas pool in Gangxi block.
引文
[1]张芙蓉,陈绍军,张洪秀,等.港西开发区浅层气的识别及分布研究[J].录井工程,2005,16(2):53-57.
[2]朱伟林,王国纯.渤海浅层油气成藏条件分析[J].中国海上油气:地质,2000,14(6):367-374.
[3]张云鹏,杨庆文.东濮凹陷浅层气成藏规律分析[J].断块油气田,1998,5(5):13-17.
[4]李敏,赵勇,杨志伟.渤海湾盆地陈家庄凸起浅层气成藏规律[J].石油实验地质,2005,27(4):399-403.
[5]陈建渝,曹忠祥.中国东部中、浅层气藏成藏动力学特征:以济阳坳陷中、浅层气藏为例[J].油气地质与采收率,2001,8(1):13-17.
[6]王振升,郭燕珩,张莉华,等.港西油田浅层气成藏条件[J].天然气工业,2009,29(12):17-19.
[7]熊定钰,钱忠平,赵波.拟合AVO属性反演[J].石油地球物理勘探,2005,40(6):646-651.
[8]宋宗平.应用AVO属性数据进行波阻抗反演处理[J].石油地球物理勘探,2004,39(4):465-467.
[9]刘洪林,朱秋影.基于叠前深度偏移的AVO反演及解释[J].地球物理学进展,2007,22(3):905-912.
[10]胡中平.AVO正反演技术[J].勘探地球物理进展,2003,26(6):382-386.
[11]王卫红,姜在兴,潘仁芳.AVO反演技术及其应用:以山西组P1-S2砂岩为例[C]∥2001年全国沉积学大会筹备组.2001年全国沉积学大会摘要论文集.武汉:中国地质大学出版社,2001.
[12]李邗,何诚.AVO处理解释和岩性识别[J].物探化探计算技术,2003,25(2):145-150.
[13]Shuey R T.Amplification of the zoeppritzps equations[J].Ge-ophysics,1985,50(4):609-614.
[14]Castagna J,Swan H,Foster D.Framework for AVO gradientand intercept interpretation[J].Geophysics,1998,63(3):948-956.
[15]张年念.叠前地震多属性分析在碳酸盐岩中的应用:以元坝区块为例[J].海洋地质动态,2009,25(1):29-33.
[16]冯顺彦.相关分析在AVO技术中的应用[D].荆州:长江大学,2009:34-43.
[2]朱伟林,王国纯.渤海浅层油气成藏条件分析[J].中国海上油气:地质,2000,14(6):367-374.
[3]张云鹏,杨庆文.东濮凹陷浅层气成藏规律分析[J].断块油气田,1998,5(5):13-17.
[4]李敏,赵勇,杨志伟.渤海湾盆地陈家庄凸起浅层气成藏规律[J].石油实验地质,2005,27(4):399-403.
[5]陈建渝,曹忠祥.中国东部中、浅层气藏成藏动力学特征:以济阳坳陷中、浅层气藏为例[J].油气地质与采收率,2001,8(1):13-17.
[6]王振升,郭燕珩,张莉华,等.港西油田浅层气成藏条件[J].天然气工业,2009,29(12):17-19.
[7]熊定钰,钱忠平,赵波.拟合AVO属性反演[J].石油地球物理勘探,2005,40(6):646-651.
[8]宋宗平.应用AVO属性数据进行波阻抗反演处理[J].石油地球物理勘探,2004,39(4):465-467.
[9]刘洪林,朱秋影.基于叠前深度偏移的AVO反演及解释[J].地球物理学进展,2007,22(3):905-912.
[10]胡中平.AVO正反演技术[J].勘探地球物理进展,2003,26(6):382-386.
[11]王卫红,姜在兴,潘仁芳.AVO反演技术及其应用:以山西组P1-S2砂岩为例[C]∥2001年全国沉积学大会筹备组.2001年全国沉积学大会摘要论文集.武汉:中国地质大学出版社,2001.
[12]李邗,何诚.AVO处理解释和岩性识别[J].物探化探计算技术,2003,25(2):145-150.
[13]Shuey R T.Amplification of the zoeppritzps equations[J].Ge-ophysics,1985,50(4):609-614.
[14]Castagna J,Swan H,Foster D.Framework for AVO gradientand intercept interpretation[J].Geophysics,1998,63(3):948-956.
[15]张年念.叠前地震多属性分析在碳酸盐岩中的应用:以元坝区块为例[J].海洋地质动态,2009,25(1):29-33.
[16]冯顺彦.相关分析在AVO技术中的应用[D].荆州:长江大学,2009:34-43.
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