深度域地震资料解释技术应用及效果

Depth-domain seismic data interpretation

深度域地震资料与时间域资料存在诸多不同,其解释方法与时间域也存在差异。应用GeoEast解释系统的深度域特色解释功能,探索了深度域地震资料的解释方法和流程:通过深度域合成记录直接标定,明确井震间的对应关系;应用井震差异建场方法进行构造图校正,使构造解释成果更加精细;运用几何类和动力学类属性进行储层预测,其空间位置更加准确;非线性的BP神经网络反演提高了储层预测精度;在速度变化不大的情况下,利用波数类属性进行含油气性检测。应用该方法完成了冀中探区深度域地震资料解释,构造解释和储层预测结果精度能够满足地质需求。

There are many differences in seismic data between the depth domain and the time domain, and interpretation methods for these data should be also different. With the tools provided by GeoEast interpretation sub-system, we discuss methods and process for depth-domain seismic data interpretation. The direct calibration of synthetic seismogram in the depth domain is used to clarify the correspondence between well and surface seismic. The structure map corrections are realized with the field building of well and surface seismic to enhance the structure interpretation. Reservoir prediction is achieved with geometric and dynamic attributes, so reservoir spatial locations are more accurate. Nonlinear BP neural network inversion can improve reservoir prediction accuracy. Wave number-like attributes can be used for hydrocarbon detection in the case of small velocity changes. Depth-domain seismic data interpretation in the Jizhong area is achieved with the mentioned approaches, and interpreted results meet the needs of the future exploration in the area.