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随着勘探程度的提高,目前要求识别的储层厚度已到几米。要准确识别薄砂层,层位标定方法就尤为重要。常规的层位标定方法有地质露头、VSP测井、区域明显地质层、人工合成记录等。这些方法只能识别大套地质分层,对于薄砂组就必须以常规方法和新方法相结合。本文就层位标定的理论及新方法进行阐述,通过应用时变子波方法准确标定薄砂层,不仅为精细储层预测提供准确的地质模型,而且为预测薄砂层分布提供有利的保证。
With the improvement of exploration, the thickness of reservoirs that are currently required to be identified has reached a few meters. To accurately identify the thin sand layer, leveling method is particularly important. Conventional horizon calibration methods include geologic outcropping, VSP logging, obvious geological formations, and synthetic records. These methods can only identify a large set of geological stratification, the sand group must be combined with the conventional method and the new method. In this paper, the theory and new method of horizon calibration are expounded. The accurate calibration of thin sand layer by using time-varying wavelet method not only provides accurate geological model for fine reservoir prediction, but also provides a favorable guarantee for the prediction of sand distribution.