井间地震观测系统设计——以垦71区块为例
|
摘要
垦71区块存在低序级断层组合关系不明、剩余油分布不清、油水关系复杂及储层较薄且多等问题,并且纵、横向变化大,为此,利用井间地震技术研究该地区的低序级断层及储层特征。首先根据实施井间地震工区的地质模型建立速度模型,然后依据设计的观测系统进行正演模拟,模拟的波场反映了井间地震的主要波场特征,反射波成像剖面反映了地质模型的地质特征。依据设计的观测系统进行野外作业,实际资料的反射波成像剖面分辨率较高,落实了井间的低序级断层以及薄储层特征。通过对正演模型模拟数据以及垦71区块实际资料的处理分析,对井间地震的观测系统设计有以下认识:①炮点距及检波点距应满足两井之间纵、横向分辨率的要求,3m左右为宜;②反射角度的范围根据该地区的地质特点以及采集仪器的特点确定;③根据目的层段的深度范围确定覆盖次数。
The Ken 71 Block has unknown low-order fault complex relation,unknown remaining oil distribution,complex oil-water relation,thin and multiple reservoirs and varies greatly in horizontal and vertical direction.Therefore,the low-order fault complex and reservoir characteristics in the area are researched by crosswell technology.Firstly,the velocity model is established by the geological model of the crosswell seismic working area.Secondly,the forward modeling is done according to by the designed observation system.The modeled wave field reflected the main wave field characteristics of the crosswell seismic,the reflected wave imaging profile reflected geologic characteristic of geologic model.The field operation was done based on the designed observation system,the resolution of the reflected wave imaging profile of the real data is high,and the characteristics of the low order fault complex and the thin reservoirs cross wells were ascertained.By the processing and analysis of the forward model modeling data and the real data from Ken 71 faults,the conclusions for the observation system design of the crosswell seismic are:1) The shooting distance and geophone interval should meet the requirements of the horizontal and vertical resolution between the two wells,3m is suitable.2) The range of the reflected angle should be ascertained based on the areal geology and acquisition instrument features.3) The fold should be ascertained according to the depth interval of the intended interval.
The Ken 71 Block has unknown low-order fault complex relation,unknown remaining oil distribution,complex oil-water relation,thin and multiple reservoirs and varies greatly in horizontal and vertical direction.Therefore,the low-order fault complex and reservoir characteristics in the area are researched by crosswell technology.Firstly,the velocity model is established by the geological model of the crosswell seismic working area.Secondly,the forward modeling is done according to by the designed observation system.The modeled wave field reflected the main wave field characteristics of the crosswell seismic,the reflected wave imaging profile reflected geologic characteristic of geologic model.The field operation was done based on the designed observation system,the resolution of the reflected wave imaging profile of the real data is high,and the characteristics of the low order fault complex and the thin reservoirs cross wells were ascertained.By the processing and analysis of the forward model modeling data and the real data from Ken 71 faults,the conclusions for the observation system design of the crosswell seismic are:1) The shooting distance and geophone interval should meet the requirements of the horizontal and vertical resolution between the two wells,3m is suitable.2) The range of the reflected angle should be ascertained based on the areal geology and acquisition instrument features.3) The fold should be ascertained according to the depth interval of the intended interval.
引文
[1]赵群,郝守玲.井间地震观测系统的物理模型研究.石油物探,2004,43(3):298～300
[2]陈国金.井间观测系统的讨论.石油物探,1996,35(3):93～109
[3]曹辉,郭全仕,唐金良等.井间地震资料特点分析.勘探地球物理进展,2006,29(5):312～317
[4]唐金良,曹辉,王立华等.中值滤波在井间地震资料处理中的应用.石油物探,2005,44(1):47～50
[5]刘辛,居春荣,黄啸年等.井间地震技术在黄珏油田开发中的初步应用.石油天然气学报,2005,27(6):729～731
[6]毛中华,牟来勇,刘美丽等.垦71井区井间地震数据采集方法.石油地球物理勘探,2008,43(增刊2):80～83
[7]王永刚,曹丹平,刘磊等.井间地球物理资料的综合显示及其应用.石油物探,2004,43(5):462～465
[8]曹辉.井间地震技术发展现状.勘探地球物理进展,2002,25(6):6～10
[9]李红立,潘冬明,徐红利.井地地震CT技术及其应用.煤田地质与勘探,2008,36(3):71～74
[10]李万万,裴正林.井间地震弹性波传播特征数值模拟.物探与化探,2008,32(2):207～211
[2]陈国金.井间观测系统的讨论.石油物探,1996,35(3):93～109
[3]曹辉,郭全仕,唐金良等.井间地震资料特点分析.勘探地球物理进展,2006,29(5):312～317
[4]唐金良,曹辉,王立华等.中值滤波在井间地震资料处理中的应用.石油物探,2005,44(1):47～50
[5]刘辛,居春荣,黄啸年等.井间地震技术在黄珏油田开发中的初步应用.石油天然气学报,2005,27(6):729～731
[6]毛中华,牟来勇,刘美丽等.垦71井区井间地震数据采集方法.石油地球物理勘探,2008,43(增刊2):80～83
[7]王永刚,曹丹平,刘磊等.井间地球物理资料的综合显示及其应用.石油物探,2004,43(5):462～465
[8]曹辉.井间地震技术发展现状.勘探地球物理进展,2002,25(6):6～10
[9]李红立,潘冬明,徐红利.井地地震CT技术及其应用.煤田地质与勘探,2008,36(3):71～74
[10]李万万,裴正林.井间地震弹性波传播特征数值模拟.物探与化探,2008,32(2):207～211
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