多波地震联合反演预测相对优质储层——以川西深层致密碎屑砂岩为例
|
摘要
川西深层上三叠统须家河组四段发育三角洲致密碎屑砂岩,砂体厚度大,但含气较好的相对优质储层厚度薄。相对优质储层与作为围岩的致密砂岩和泥岩波阻抗较为接近,利用常规地震方法很难预测该类优质储层分布,而且预测精度差。利用3D3C勘探优势,开展纵波及转换横波联合反演,在储层岩石物理参数敏感性分析基础上,采用"砂中找砂"的预测思路,优选泊松比、P波阻抗多波属性数据体,采用多体交会解释手段,剔除泥岩和致密砂岩,可较好地预测致密砂岩背景中相对优质储层的分布。
Clastic sandstones of delta facies were developed in the fourth member of the Tertiary Xujiahe formation(T3x4) in the western Sichuan Basin and they are tight with low porosity and low permeability.The sandbodies are large in thickness,but their gas-bearing reservoirs are thin.The wave impedance of these reservoirs is similar to the surrounding rocks—tight sandstone and mudstone.It is very difficult to accurately predict the distribution of these reservoirs using conventional seismic methods.Taking advantages of 3D3C exploration,we have carried out a joint inversion of P-wave and converted shear wave.Based on the analysis of petrophysical parameter sensitivity,we have proposed the idea of "recognize quality sandstone in sandstone".The multiwave attribute data volume such as Poisson's ratio and P-wave impedance are selected for multi-volumes crossplot interpretation to recognize mudstone and tight sandstone.In this way the relatively high-quality reservoirs within tight sandstones can be accurately identified.
Clastic sandstones of delta facies were developed in the fourth member of the Tertiary Xujiahe formation(T3x4) in the western Sichuan Basin and they are tight with low porosity and low permeability.The sandbodies are large in thickness,but their gas-bearing reservoirs are thin.The wave impedance of these reservoirs is similar to the surrounding rocks—tight sandstone and mudstone.It is very difficult to accurately predict the distribution of these reservoirs using conventional seismic methods.Taking advantages of 3D3C exploration,we have carried out a joint inversion of P-wave and converted shear wave.Based on the analysis of petrophysical parameter sensitivity,we have proposed the idea of "recognize quality sandstone in sandstone".The multiwave attribute data volume such as Poisson's ratio and P-wave impedance are selected for multi-volumes crossplot interpretation to recognize mudstone and tight sandstone.In this way the relatively high-quality reservoirs within tight sandstones can be accurately identified.
引文
1杨克明.川西坳陷须家河组天然气成藏模式探讨[J].石油与天然气地质2006,27(6):786～793
2邓少云,叶泰然,吕正祥,等.川西新场构造须家河组二段气藏特征[J].天然气工业,2008,28(2),42～45
3郑荣才,叶泰然,翟文亮,等.川西坳陷上三叠统须家河组砂体分布预测[J].石油与天然气地质,2008,29(3):405～411
4叶军,陈昭国.川西新场大型气田地质特征与预测关键技术[J].石油与天然气地质2006,27(3):384～391
5石玉梅,姚逢昌,曹宏.多波多分量天然气勘探技术的进展[J].勘探地球物理进展,2003,26(3):173～177
6Cafarelli B,Madtson E,Krail P,et al.3-D gas cloud imaging of the Donald Field with converted wave[Z].Expanded Abstracts of70th Annual Internate,2000.1158-1161
7杨克明,张虹.地震三维三分量技术在致密砂岩裂缝预测中的应用[J].石油与天然气地质,2008,29(5):683～689
8程冰洁,徐天吉.转换波资料在川西储层预测中的应用[J].石油物探,2009,48(2):181～186
9叶泰然.基于波形的波阻抗特征识别技术在川西气田储层预测中的应用[J].石油物探,2005,44(6),632～635
10莫午零,吴朝东.裂缝性储层AVO模型研究[J].天然气工业,2007(2),27(2):43～45
11赵邦六.多分量地震勘探在岩性气藏勘探开发中的应用[J].石油勘探与开发,2008,35(4):397～40
12朱成宏.从EAGE第66届年会看多分量地震技术的新进展[J].勘探地球物理进展,2004,27(4):300～307
13王贇,腾殿波,刑春颖.多分量地震技术实用化的一些关键问题[J].天然气工业,2005,28(3):174～177
2邓少云,叶泰然,吕正祥,等.川西新场构造须家河组二段气藏特征[J].天然气工业,2008,28(2),42～45
3郑荣才,叶泰然,翟文亮,等.川西坳陷上三叠统须家河组砂体分布预测[J].石油与天然气地质,2008,29(3):405～411
4叶军,陈昭国.川西新场大型气田地质特征与预测关键技术[J].石油与天然气地质2006,27(3):384～391
5石玉梅,姚逢昌,曹宏.多波多分量天然气勘探技术的进展[J].勘探地球物理进展,2003,26(3):173～177
6Cafarelli B,Madtson E,Krail P,et al.3-D gas cloud imaging of the Donald Field with converted wave[Z].Expanded Abstracts of70th Annual Internate,2000.1158-1161
7杨克明,张虹.地震三维三分量技术在致密砂岩裂缝预测中的应用[J].石油与天然气地质,2008,29(5):683～689
8程冰洁,徐天吉.转换波资料在川西储层预测中的应用[J].石油物探,2009,48(2):181～186
9叶泰然.基于波形的波阻抗特征识别技术在川西气田储层预测中的应用[J].石油物探,2005,44(6),632～635
10莫午零,吴朝东.裂缝性储层AVO模型研究[J].天然气工业,2007(2),27(2):43～45
11赵邦六.多分量地震勘探在岩性气藏勘探开发中的应用[J].石油勘探与开发,2008,35(4):397～40
12朱成宏.从EAGE第66届年会看多分量地震技术的新进展[J].勘探地球物理进展,2004,27(4):300～307
13王贇,腾殿波,刑春颖.多分量地震技术实用化的一些关键问题[J].天然气工业,2005,28(3):174～177
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心