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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。
Prediction of thin sand thickness is one of the difficulties in oil and gas field exploration and development. In this paper, a linear transition medium theory is introduced to establish a more realistic wedge-like linear transition medium model. Based on the forward modeling of the time-domain theoretical model and the analysis of the characteristics of the frequency-domain response, a research idea of using the tuning frequency information to predict the thin sand layer thickness is proposed. Application set up a corresponding set of forecasting process. The real drilling verification shows that the predicted spatial distribution and thickness of the thin sand body are in good agreement with the actual situation, and the method has good application and promotion value.