相干体技术在火山岩预测中的应用

The application of coherence technology in the volcanic reservoir prediction.

1. 中国石油天然气股份有限公司勘探开发研究院,北京100083;2. 大庆油田勘探开发研究院,黑龙江大庆163001

Research Institute of Petroleum Exploration and Development, Petrochina, Beijing 100083, China

火山岩气藏地质特征复杂,岩相变化快,物性变化大,地震响应特征复杂,规律性差,预测困难。三维相干技术可以通过检测同相轴的不连续性,对断层、特殊岩性体进行识别。在松辽盆地北部徐家围子断陷深层火山岩的研究中,利用体属性多算子相干分析技术计算了高分辨率相干体、倾角体和方位角体,并采用HLS(色调、光亮度和饱和度)彩色模型显示这些地震属性体;然后结合三维可视化技术对火山岩的分布范围进行了预测。在相干体切片上,断层清楚,火山口和火山岩体分布范围清晰。

By calculating coherence between seismic data traces, coherence analysis technology is capable of predicting fault and special lithologic bodies effectively. Not only can it improve the precision of interpretation, but also shorten the exploration period. In researching on deep volcanic, a coherence cube, a dip cube and a azimuth cube with high resolution are generated by a new coherence method. Combining these cubes with 3-D visualization technique, the prediction of volcanic distribution is then implemented. The faults and the distribution of volcanic rock are clear in the slices of coherence cube.