时深转换技术在巴西某海域3D层速度建模中的应用
|
摘要
地震勘探技术面临的关键问题之一是时间域数据向深度域转换的问题。时间域与深度域之间的转换桥梁是平均速度。获得平均速度的途径主要有两个:井数据和地震数据。研究区位于巴西某海域,海水深,海底地形起伏大。尽管井资料多,但分布不均匀,3D地震速度资料缺乏,多井平均速度拟合存在问题。利用Petrel软件,通过追踪海底反射层界面、井震标定、主要构造层位解释,重建地下3D层速度模型,为储层建模、储量复算、开发井调整等提供了精确的深度域数据体。
One of the key elements of seismic interpretation is the problem of data transformation between time domain and depth domain. And the average velocity is the bridge between time and depth domain. There are two data sources to get average velocity:well data and seismic data.The study area is located in the offshore of Brazil,where the sea-water is deep and the sea bottom varies sharply. Although there are many well data, the distribution of them is uneven. The 3 D seismic velocity data is absent, and the filter of average velocity among wells has problems. Base on the tracing of sea bottom, seismic-well tie, and horizons interpretation, the3 D interval velocity model has been rebuilt in Petrel software. And it has been used to provide the precise data in depth domain for reservoir modeling, reserve recalculation, and development well adjustment.
One of the key elements of seismic interpretation is the problem of data transformation between time domain and depth domain. And the average velocity is the bridge between time and depth domain. There are two data sources to get average velocity:well data and seismic data.The study area is located in the offshore of Brazil,where the sea-water is deep and the sea bottom varies sharply. Although there are many well data, the distribution of them is uneven. The 3 D seismic velocity data is absent, and the filter of average velocity among wells has problems. Base on the tracing of sea bottom, seismic-well tie, and horizons interpretation, the3 D interval velocity model has been rebuilt in Petrel software. And it has been used to provide the precise data in depth domain for reservoir modeling, reserve recalculation, and development well adjustment.
引文
[1]周蒂,胡登科,何敏,等.深部地层时深转换中的拟合式选择问题[J].地球科学——中国地质大学学报, 2008, 33(4):531-537.
[2]张华军,肖富森,刘定锦,等.地质构造约束层速度模型在时深转换中的应用[J].石油物探, 2003, 42(4):521-525.
[3]李培培,刘志国,杨松岭,等.虚拟井技术在无井或少井条件下时深转换中的应用[J].物探与化探, 2015, 39(5):994-1000.
[4]陈林,邓勇,盖永浩,等.复杂断块构造时深转换方法探讨——以涠西南凹陷为例[J].地球物理学进展, 2014, 29(3):1121-1127.
[5]凌云,郭建明,郭向宇,等.油藏描述中的井震时深转换技术研究[J].石油物探, 2011, 50(1):1-13.
[6]张英德,彭佳勇,郝立业,等.海外深水复杂地质条件下时深转换难点及技术对策[J].地球物理学进展, 2012, 27(4):1484-1492.
[7]汪俊,高红芳,陈泓君,等.基于速度-深度线性模型的时深转换方法及其在南海海盆深水区的应用[J].热带海洋学报,2013, 32(2):112-117.
[2]张华军,肖富森,刘定锦,等.地质构造约束层速度模型在时深转换中的应用[J].石油物探, 2003, 42(4):521-525.
[3]李培培,刘志国,杨松岭,等.虚拟井技术在无井或少井条件下时深转换中的应用[J].物探与化探, 2015, 39(5):994-1000.
[4]陈林,邓勇,盖永浩,等.复杂断块构造时深转换方法探讨——以涠西南凹陷为例[J].地球物理学进展, 2014, 29(3):1121-1127.
[5]凌云,郭建明,郭向宇,等.油藏描述中的井震时深转换技术研究[J].石油物探, 2011, 50(1):1-13.
[6]张英德,彭佳勇,郝立业,等.海外深水复杂地质条件下时深转换难点及技术对策[J].地球物理学进展, 2012, 27(4):1484-1492.
[7]汪俊,高红芳,陈泓君,等.基于速度-深度线性模型的时深转换方法及其在南海海盆深水区的应用[J].热带海洋学报,2013, 32(2):112-117.