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成功地进行盐成像需要对盐边界和其周围的断层做一番精细描述。确定准确的盐边界对于在盐边界含油气远景上倾方向钻井是有必要的,并且有必要划定盐周围的小断层,因为这些小断层对油气圈闭起分隔作用。然而,盐成像的成败主要取决于能否建立一个精确三维速度模型。地震成像和准确的深度预测要求一个精确的三维速度模型。建立这种模型的合理方法是要保证能综合地质上合理的纵、横向速度变化和所有能得到的井资料。当对待地压带、礁状岩隆和盐这类的地质复杂条件时,综合使用井资料尤为重要。结合墨西哥湾的一个应用实例,本文就建立一个地压带的三维速度模型方法以及研究综合利用井资料的方法和算法进行了探讨。
Successful salt imaging requires a detailed description of the salt boundaries and the surrounding faults. Determining accurate salt boundaries is necessary for drilling wells that have a dip in the oil-gas vista along the salt boundary and it is necessary to delineate small faults around salt because these small faults separate the hydrocarbon trap. However, the success of salt imaging depends critically on the ability to create an accurate three-dimensional velocity model. Seismic imaging and accurate depth prediction require an accurate three-dimensional velocity model. A reasonable way to establish such a model is to ensure that the longitudinal and lateral velocity variations and all available well data can be integrated geologically and reasonably. When dealing with the geological pressure zones, rock reefs and salt complex geological conditions, the comprehensive use of well data is particularly important. In combination with an application example of the Gulf of Mexico, this paper discusses a three-dimensional velocity model of a g-belt and a method and algorithm for comprehensive utilization of well data.