地层吸收特征参数分析预测深层气藏方法

Predicting deep gas pool by formation absorption characteristic parameter

地层吸收特征参数对于油气储层的预测与描述,特别是天然气藏的预测是一个非常重要的参数。品质因子Q作为表征地层吸收特征的一个重要参数,能够反映地层岩石和油气藏的物理特性。本方法基于S变换,得到两种品质因子Q值的估算方法,推导出峰值频率和平均频率与品质因子Q值的变换关系,利用Q值的异常特性来预测天然气藏的位置和范围。经过模型和实际资料的吸收特征参数分析,效果明显。

Formation absorption characteristic parameter is an important parameter for prediction and description of hydrocarbon reservoir, especially for predicting natural gas pool. Q-factor as a parameter of characterizing formation absorption characteristics can show the physical characteristics of rock and hydrocarbon reservoir. Based on S-transformation, evaluational approaches of two Q-factors are obtained to derive the transformation relation between peak value frequency, even frequency and Q-factor value. Then the location and area of natural gas pool are predicted by abnormal characteristics of Q value. The analysis on absorption characteristic parameter of model and actual data shows the good results.