高分辨率三维地震技术在油田开发中的应用

Application of high resolution 3-D seismic technology to oil field development

大庆石油管理局地球物理勘探公司,大庆163357

Geophysical Prospecting Company, Daqing Petroleum Administration, Daqing 163357

针对松辽盆地北部砂泥岩薄互层的地质特点,结合三维地震和高分辨率地震的优势,开展了高分辨率三维地震的研究工作。采集上在确保资料信噪比的前提下拓宽有效频带;处理上实现了在高信噪比基础上的高分辨率处理,使得地震资料在纵向和三度空间上能够更准确可靠地反映地下地质情况。地震解释采用先进的全三维构造精细解释和多信息多方法的综合地震岩性解释技术,提高了小断层、小幅度构造和储层预测的精度,经开发井验证,取得了较好的地质效果和经济效益。

In view of the geologic character of thin interbed in northern Songliao Basin, a research work on high resolution 3-D seismic exploration has been made, which integrates the advantage of 3-D seismic with that of high resolution seismic. In seismic acquisition, the effective frequency bandwidth is broaden on the prerequisite of preserving the signal to noise ratio of seismic data. High resolution processing based on the high S/N ratio is carried out to enable seismic data to reflect exactly the subsurface geologic features in vertical direction and in three dimension space. Seismic interpretation adopts advanced full 3-D fine structural interpretation and comprehensive seismic lithologic interpretation technique integrating various information and methods. These improve the precision of minor faults, small scale structures, and reservoir prediction. Good geologic and economic benefits have been achieved through the verification of development wells.