河道砂体识别技术

Identification of channel sand

河道砂体是一种重要储集体 ,如何准确、快速地识别河道砂体是提高钻探成功率和降低生产部门投资风险的关键。河道砂体以单层厚度小、单砂体体积小和横向变化快为特点 ,利用常规的方法难于识别。通过分析该类储集体的沉积特征 ,建立起相应的地球物理响应模式 ,利用先进的三维可视化技术快速地识别河道砂体。实际应用表明该方法具有良好的应用效果 。

The main reservoir space is the channel sand of Pendlaizhen Formation in the depression of west Sichuan. Fast and accurate identification of the channel sand becomes the key to increase the percentage of drill success and decrease investment risk. However, conventional methods fail to identify the sand body because the thickness and volume of the sand body is small, and changes fast laterally. Based on an analysis of the sedimentary characteristics of the channel sand, this paper establishes a geophysical response pattern, and uses the advanced 3-D visualization method to identify the channel sand. Desired results have been achieved by applying the method to real data.The method could be used in the study of terrestrial formations.