The Study Of Dongying Deep Seismic Data Processing Technology

After more than 40 years of exploration and development, the exploration level of shallow, middle in Shengli Oil Field is increasing and workload aimes at this kind of objectives is decreasing. Exploration objectives are diverted from middle, shallow to middle, deep gradually. The petroleum exploration of Jiyang depression deep has become the main object for the future.This topic starts with analyzing the features of deep seismic signals, and a series of research on the processing of deep were developed. In respect of analyzing the features of data, we advanced the method of quantitative analyzing on energy, S/N, etc of deep, which conquered the deficiency of qualitative analyzing method. Considering the weak energy of deep data, we applied the methods of surface consistent amplitude recovery, amplitude statics and residual amplitude statics, which resolved the energy difference problem better and enhanced the deep signals. Considering it is hard to describe the deep data, we advanced the technology of residual NMO, which removed the residual move out and stacked the reflectives in phase, consequently enhanced the continuity of reflective events and improved the quality of stack data. In respect of wavelet processing, we applied the technology of surface consistent deconvolution to compress the wavelet and consistent correction, which improved the data resolution. In respect of noise attenuation, according to distribution features of noises in different geophysical domains, we advanced the noise attenuation method based on seismic data reconstruction, which can suppress the noises, safeguard the efficient signals at the same time and improve data fidelity. In respect of deep data imaging, we advanced the methods of high resolution move out correction, dominating energy optimum stack, variable bin optimum stack and processing based on geologic model, which resolve the problems of deep signals stack imaging and migration imaging basically.By means of fine processing on deep data of Panhe, Dongying and Linfanjia, we concluded a set of process flows suitable for Dongying deep. After repeated processing, the old deep data has a better S/N, the deep reflective features are prominent, the reflectives of buried hills are legible. The quality is improved obviously and favorable applied effects were gotten.