论文部分内容阅读
纵波亮点技术用于找气已有许多成功的例子.众所周知,并不是一切亮点都表示有工业价值的油气聚集,实际上存在着大量由低饱和度的含气砂岩和反射系数特别大的硬地层以及一些岩性因素的低速异常引起的假亮点。过去鉴别这些假亮点的唯一办法是靠地震、地质、钻井资料的综合解释,近年来有一种新的直接指示气藏的方法——纵、横波地震资料对比法.它利用含气砂岩的纵、横波速度变化不同来鉴别由地层因素引起的假亮点;利用有足够分辨率的纵、横波资料的速度比(V_p/V_s)来定量估计流体含量以区分由低饱和度的含气砂岩引起的亮点.这前一种定性估计的方法已被证实是一种可行的方法,在DEG53届年会上也有一些好的实例,本文将着重介绍这种方法,对定量估计方法也作一简单介绍。
There are many successful examples of P-wave technology used to find gas, and it is well known that not all highlights point to the accumulation of oil and gas of industrial value. In fact, there are a large number of gas-bearing sandstones of low saturation and hard formations with particularly large reflection coefficients As well as false highlights caused by low-speed anomalies of some lithological factors. In the past, the only way to identify these false bright spots was based on the comprehensive interpretation of seismic, geological and drilling data. In recent years, there has been a new method for directly indicating gas reservoirs - the longitudinal and transverse seismic data contrast method. It uses the longitudinal, Different shear-wave velocities are used to identify the false bright spots caused by the formation; the velocity ratio (V_p / V_s) of the well-resolved longitudinal and transverse wave data is used to quantitatively estimate the fluid content to distinguish the bright spots caused by low-saturation gas-bearing sandstones This first qualitative estimation method has proved to be a viable approach and there are some good examples at the DEG53 Annual Meeting. This article will focus on this method and give a brief introduction to the quantitative estimation method.