基于线性过渡体介质理论的薄砂层厚度预测技术

薄砂层厚度预测是油气田勘探开发的难点之一。本文引入线性过渡介质理论,建立更为接近实际的楔状线性过渡介质模型,通过时域理论模型正演及频域响应特征分析,提出利用调谐频率信息预测薄砂层厚度的研究思路,并在实际应用中建立起一套相应的预测流程。实钻验证表明,预测出的薄砂体空间展布范围及厚度与实际情况吻合度较高,该方法具有良好的应用和推广价值。

Thin Sand Thickness Predicting Technique Based on the Theory of Linear Transitional Medium

It is one of the difficult problems in oil and gas exploration to predict the thin sand thickness. This paper introduces the linear transitional theory. Based on such theory, the linear transitional wedge model which is more closely to the practical medium is established. Following the forward modeling in time domain and the characteristic analysis of its response in frequent domain, a thought of thin sand thickness predicting based on turning frequency is proposed and a relevant working flow is also formed by the practical thin sand thickness prediction. Validated by the drilled-well data, it is found that the predicting results of the thin sand spatial boundary and thickness are coincide with the reality and that the method has a good future by widely using.