储层岩性高分辨率地震资料精细解释技术初步探讨

On the fine interpretation of reservoir lithology using high-resolution seismic data

大庆石油管理局物探公司研究所, 大庆 163357

Research Institute, Geophysical Exploration Company, Daqing Petroleum Administration,Daqing 163357

目前, 普遍采用基于不同算法的预测软件利用高分辨率地震资料进行储层预测, 预测结果除受地震资料的频率和保真度影响外, 主要受软件本身其法的影响。无论哪种软件, 其算法主要是数学原理, 缺少地质信息, 使其结果具有多解性, 往往不符合地质规律。为消除预测的多解性, 本文介绍的预测技术是在细分沉积微相的基础上, 对研究的地震地质层位进行综合标定, 结合古地貌、正演模型及多种储层预测软件对储层进行岩性预测, 最后加以分析定论, 得到最终预测结果。这种综合预测方法在一定程度上提高了储层岩性预测的精度, 并已在高分辨开发地震区块得到验证。

At present, the reservoir prediction using high-resolution seismic data is made universally byadopting the prediction software based on different algorithms. The prediction results are affectedby the frequency and fidelity of seismic data, and mainly affected by the software algorithm. Nomatter which kind of software, the algorithm is mainly in accordance with mathematical principleand short of geological information, which make the results possess ambiguity and seldorn conformto geo1ogical laws. In order to remove the ambiguity of prediction, we use the predictiontechnology introduced in the paper to comprehensively calibrate the seismogeological horizon onthe basis of an elaborate division of sedimentary microfacies. Together with thepaleogeomorphology, forward model, and several reservoir prediction software, we carry out thereservoir lithology prediction and analysis and obtain final conclusions and prediction results. Thiskind of comprehensive prediction method improves the precision of reservoir litho1ogy prediction toa certain extent. And we have tested and verified the method in a high-resolution developmentselsmlc area.