基于Gassmann方程的鲕滩储层流体替换模拟技术及其应用
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摘要
基于单井资料的储层地震响应模拟和流体识别大多采用褶积模型,但对于复杂地质模型,采用褶积模型模拟的波场动力学特征不明显。提出了基于Gassmann方程的流体替换波动方程模拟技术,从波动方程角度刻画了复杂鲕滩储层模型的地震响应。该方法利用Gassmann等效介质理论,对鲕滩储层实现由干岩石到有效孔隙饱和岩石的替换,由已知预测未知;之后通过建立鲕滩薄互层模型和薄互层楔形体模型,正演模拟了鲕滩储层含气后的地震响应,地震响应表现为"亮点"特征。
Reservoir seismic response simulation and fluid identification techniques based on single-well information mostly adopts convolution model.However,for complex geological model,the kinetic characteristics of the wave field of the simulated results adopted convolution model were not obvious.Aiming at the problem,Gassmann equation based fluid substitution wave equation simulation technology was proposed,which described the seismic response of complex oolitic shoal reservoir model from wave equation aspect. The method uses Gassmann equivalent medium theory,realizes the fluid substitution of dry rock to effective pore saturated rock for oolitic shoal reservoir,predicts unknown from the known.Then,by establishing oolitic shoal thin interbedded model and wedge thin interbedded model,the seismic response of gas-bearing oolitic shoal reservoir was simulated by forward modeling,which showed"bright spot"characteristic.
Reservoir seismic response simulation and fluid identification techniques based on single-well information mostly adopts convolution model.However,for complex geological model,the kinetic characteristics of the wave field of the simulated results adopted convolution model were not obvious.Aiming at the problem,Gassmann equation based fluid substitution wave equation simulation technology was proposed,which described the seismic response of complex oolitic shoal reservoir model from wave equation aspect. The method uses Gassmann equivalent medium theory,realizes the fluid substitution of dry rock to effective pore saturated rock for oolitic shoal reservoir,predicts unknown from the known.Then,by establishing oolitic shoal thin interbedded model and wedge thin interbedded model,the seismic response of gas-bearing oolitic shoal reservoir was simulated by forward modeling,which showed"bright spot"characteristic.
引文
1梅清,张红梅,杨天泉.川东北飞仙关组鲕滩储层地震响应特征及类型划分[J].天然气勘探与开发,2003,26 (1):1-4
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3谭国华,赖月莲,王秀英,等.普光气田飞仙关组地震反射系数特征及应用[J].海洋石油,2007(4):9-13
4李岩峰,刘殊,曾晓,等.川东飞仙关组鲕滩储层地震响应特征及预测[J].石油物探,2005,44(3):236-239
5谢增业,田世澄,单秀琴,等.川东北飞仙关组鲕滩天然气富集成藏特征及勘探前景[J].石油勘探与开发, 2005,32(2):23-27
6黄先平,张健,谢芳,等.鲕滩储层预测技术、流体识别方法在川东北地区飞仙关组天然气勘探中的应用[J].中国石油勘探,2003,8(1):41-49
7杨雨,张静,张光荣.川东下三叠统飞仙关组鲕滩分布及其天然气勘探前景[J].成都理工学院学报,2000,27 (增刊):147-150
8邹文.基于地震资料的流体识别技术研究[D].成都:成都理工大学,2008.33-61
9陈学华.时频分布与地震信号谱分析研究[D].成都:成都理工大学,2006.48-60
10殷八斤,曾灏,杨在岩.AVO技术的理论与实践[M].北京:石油工业出版社,1995.55-67
11王炳章.地震岩石物理学及其应用研究[D].成都:成都理工大学,2008.111-115
12 Gassmann F.Elastic waves through a packing of spheres[J].Geophysics,1951,16(3):673-682
13 Biot M A.Theory of propagation of elastic waves in a fluid saturated porous solid,I:low frequency range,andⅡ:higher-frequency range[J].Journal of the Acous tical Society of America,1956,28(2):168- 191
14葛瑞·马沃可,塔潘·木克基,杰克·德沃金.岩石物理手册—空隙介质中的地震分析工具[M].徐海滨,戴建春,译.北京:中国科学技术大学出版社,2008.143- 151
15 Hilterman F J.地震振幅解释[M].孙夕平,赵良武,译.北京:石油工业出版社,2006.9-38
16王之敬.地震岩石物理学基本准则[J].石油物探译丛, 2001,4(1):1-20
17贺振华.反射地震资料偏移处理与反演方法[M].重庆:重庆大学出版社,1989.56-68
18熊晓军.单程波动方程地震数值模拟新方法研究[D].成都:成都理工大学,2007.27-29
19张关泉.利用低阶偏微分方程组的大倾角差分偏移[J].地球物理学报,1986,29(3):273-282
2马永生,郭旭升,凡睿.川东北普光气田飞仙关组鲕滩储集层预测[J].石油勘探与开发,2005,32(4):60-64
3谭国华,赖月莲,王秀英,等.普光气田飞仙关组地震反射系数特征及应用[J].海洋石油,2007(4):9-13
4李岩峰,刘殊,曾晓,等.川东飞仙关组鲕滩储层地震响应特征及预测[J].石油物探,2005,44(3):236-239
5谢增业,田世澄,单秀琴,等.川东北飞仙关组鲕滩天然气富集成藏特征及勘探前景[J].石油勘探与开发, 2005,32(2):23-27
6黄先平,张健,谢芳,等.鲕滩储层预测技术、流体识别方法在川东北地区飞仙关组天然气勘探中的应用[J].中国石油勘探,2003,8(1):41-49
7杨雨,张静,张光荣.川东下三叠统飞仙关组鲕滩分布及其天然气勘探前景[J].成都理工学院学报,2000,27 (增刊):147-150
8邹文.基于地震资料的流体识别技术研究[D].成都:成都理工大学,2008.33-61
9陈学华.时频分布与地震信号谱分析研究[D].成都:成都理工大学,2006.48-60
10殷八斤,曾灏,杨在岩.AVO技术的理论与实践[M].北京:石油工业出版社,1995.55-67
11王炳章.地震岩石物理学及其应用研究[D].成都:成都理工大学,2008.111-115
12 Gassmann F.Elastic waves through a packing of spheres[J].Geophysics,1951,16(3):673-682
13 Biot M A.Theory of propagation of elastic waves in a fluid saturated porous solid,I:low frequency range,andⅡ:higher-frequency range[J].Journal of the Acous tical Society of America,1956,28(2):168- 191
14葛瑞·马沃可,塔潘·木克基,杰克·德沃金.岩石物理手册—空隙介质中的地震分析工具[M].徐海滨,戴建春,译.北京:中国科学技术大学出版社,2008.143- 151
15 Hilterman F J.地震振幅解释[M].孙夕平,赵良武,译.北京:石油工业出版社,2006.9-38
16王之敬.地震岩石物理学基本准则[J].石油物探译丛, 2001,4(1):1-20
17贺振华.反射地震资料偏移处理与反演方法[M].重庆:重庆大学出版社,1989.56-68
18熊晓军.单程波动方程地震数值模拟新方法研究[D].成都:成都理工大学,2007.27-29
19张关泉.利用低阶偏微分方程组的大倾角差分偏移[J].地球物理学报,1986,29(3):273-282
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