提高小尺度缝洞型储层预测精度的特色解释性处理技术及其应用

Characteristic interpretation processing technique and their applications in improving prediction accuracy of small scale fractured-vuggy reservoirs

随着油气勘探与开发的深入,研究目标趋于规模小且能量弱的特征,钻井难度大幅提升,对小尺度储层及裂缝预测的精度要求不断提高,重要性越发突出。通过对叠前道集资料的分析,这里提出不规则异常切除、叠前各向异性旅行时差校正、地震道异常值消除、叠后体曲率属性二次运算等方法。结果表明,根据目标体的地质特征优选解释性处理技术进行预处理或级联处理与解释,能够有效地提高塔中、塔北奥陶系灰岩小尺度缝洞型储层的预测精度。

With the development of the gas/oil exploration and exploitation,it becomes rather difficult to identify and evaluate the small-scale and fracture reservoirs due to the smaller size and weaker energy reflection in seismic profile.How to improve the prediction accuracy of reservoir is an issure of great importance.In the paper,by the analyzing of prestack seismic data,the presented method involves irregular and abnormal data removal and travel-time correction based on prestack anisotropy and curve attribute two-operation technique et al.The results show that the pre-processing processing,cascaded processing and geobody-oriented interpretation methods can effectively improve the prediction accuracy of small-scale fracture-cave Ordovician limestone karst reservoir in northern and central area of Tarim.