井～震约束反演在薄互层复杂构造地区的应用
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摘要
工区构造复杂,断层非常发育,目标层段主要以砂泥岩薄互层为主。为研究目标层段砂体的横向展布情况与储层的有利部位,对该区进行波阻抗反演研究。由于区内复杂的断层地质条件,不利于建立与实际地质情况符合的初始模型。本文讨论了利用VSP资料得到的时深关系准确标定层位,采用加密地震解释层位的方法来控制断层断点,考虑到区内薄互层的匹配因素,适当缩短子波长度的方法来提高波阻抗反演的纵向分辨率。方法使反演结果合理反映砂泥薄互层的情况,取得了较好的应用效果。
The work area possesses complex geological structure and developed faults.The target formation is mainly composed of the thin sand-shale interbed.The study of impendence inversion is implemented to find the sand distribution within the target formation and the vantage reservoir.The complex geophysical condition of the work area is not of benefit to building the initial model which coincides with real geological case.This paper discusses how to calibrate the stratigraphic sequence by the time-depth relationships from VSP data,add the horizons for describing fault location,consider match factors of thin interbed within the work area,and reduce the length of wavelet to improve the resolution of impendence inversion.These methods can make the solution of the inversion really represent the situation of the thin interbed.The application of the methods is effective.
The work area possesses complex geological structure and developed faults.The target formation is mainly composed of the thin sand-shale interbed.The study of impendence inversion is implemented to find the sand distribution within the target formation and the vantage reservoir.The complex geophysical condition of the work area is not of benefit to building the initial model which coincides with real geological case.This paper discusses how to calibrate the stratigraphic sequence by the time-depth relationships from VSP data,add the horizons for describing fault location,consider match factors of thin interbed within the work area,and reduce the length of wavelet to improve the resolution of impendence inversion.These methods can make the solution of the inversion really represent the situation of the thin interbed.The application of the methods is effective.
引文
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[15]ZHANG JIWU.On appllcation of strata software inwave impedance inversion[J].xjpg,1999,20(1):26·
[2]张继武.应用Strata软件进行波阻抗反演的几点认识[J].新疆石油地质,1999.20(1):26.
[3]沈则余,阎向华.测井约束地震反演的分辨率与地震分辨率的关系[J].石油物探,1999,38(4):96.
[4]黄花香,吴战培,熊燕.速度反演技术在四川盆地储层预测中的应用[J].石油物探,2002,41(4):456.
[5]王延光.储层地震反演方法以及应用中的关键问题与对策[J].石油物探,2002,41(3):299.
[6]崔汝国,曹国滨,王彦春,等.影响VSP层位标定的问题及对策[J].地球物理勘探,2006,41:97.
[7]朱定,陈国俊,蔡成国.利用VSP直达波资料反演粘弹介质的相速度及品质因子[J].勘探地球物理进展,2004,27(5):337.
[8]赵政章,赵贤正,王英民.储层地震预测理论与实践[M].北京:科技出版社,2004.
[9]雷雪,李忠,巫芙蓉,等.正、反演结合对川东石炭系储层地震响应特征的分析[J].物探化探计算技术,2003,25(3):207.
[10]廖玲,肖富森,王玉雪,等.川中GSM地区陆相碎屑岩油气富集区的预测方法研究[J].物探化探计算技术2003,25(4):312.
[11]彭真明,张启衡,龚奇.波阻抗反演中的全局寻优策略[J].物探化探计算技术,2003,25(2):151.
[13]张卫红,王瑞琪.地震、测井联合反演在塔河油田石炭系储层预测中的应用[J].物探化探计算技术,2002,24(2):129.
[14]RENKA R J.Multivariate Interpolation of Large Sets of Scattered Data[J].ACM Transaction on Mathematical Software,1988,14(9):139.
[15]ZHANG JIWU.On appllcation of strata software inwave impedance inversion[J].xjpg,1999,20(1):26·
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