A New Technique to Support Future Energy Exploration of Continental Sedimentary Basin: BWH Full-Frequency Fidelity and Amplitude Preserving Processing Technology

Bao, Yi (Exploration and Development Research Institute of Daqing Oilfield Company Ltd. CNPC.) | Wang, Cheng (Exploration and Development Research Institute of Daqing Oilfield Company Ltd. CNPC.) | Chen, Shu-min (Exploration and Development Research Institute of Daqing Oilfield Company Ltd. CNPC.) | Wang, Jian-min (Exploration and Development Research Institute of Daqing Oilfield Company Ltd. CNPC.) | Chen, Zhi-de (Exploration and Development Research Institute of Daqing Oilfield Company Ltd. CNPC.) | Pei, Jiang-yun (Exploration and Development Research Institute of Daqing Oilfield Company Ltd. CNPC.) | Wu, Jia-yi (Exploration and Development Research Institute of Daqing Oilfield Company Ltd. CNPC.)

OnePetro 

Abstract

The existing seismic data in the deep layer of Songliao Basin have low vertical resolution, poor imaging accuracy and weak ability to depict anisotropy of seismic data, so the seismic data can not meet the geological requirements of fine target characterization. In order to identify thinner reservoirs and smaller faults in deep and complex structural areas, to complete sequence subdivision on volcanic rocks of Yingcheng formation and the dense sand of Shahezi formation, BWH seismic data acquisition is deployed in Anda sag. Aiming at the characteristics of clear description of BWH wave field but low SNR. A Full-frequency Fidelity and Amplitude preserving processing Technology (Flow) supported by surface consistent time-varying pulse deconvolution and viscoelastic medium prestack time migration and depth migration techniques is formed. Compared with the old data, the target band width of the BWH data has been widened by 15 Hz, the imaging quality of the complex structural area is improved obviously, and the prediction coincidence rate of the thin sand body over 8m is increased by more than 10 percentage points. The thin interbed is developed in continental sedimentary basin, and the horizontal heterogeneity is serious. The BWH acquisition and full frequency amplitude preserving processing technology will bring a new solution for fine target exploration in deep and complex structural area of Continental Sedimentary basin.