Application of multi-wavelet decomposition and reconstruction technique in reservoir characterization in TKT-NGS Oilfield,Algeria
Dai Shuang-he1, Chen Zhi-gang2, Yu Jing-bo2, Xie Jie-lai2, Mao Feng-jun3, Wei Tian-chang4, Li Yong-bao5
1. School of Earth and Space Sciences,Peking University,Beijing City,100871,China;
2. Geology Research Centre of Geophysical Research Institute,BGP Inc.of CNPC,Zhuozhou City,Hebei Province,072751,China;
3. Research Institute of Petroleum Exploration and Development of Petrochina,Beijing City,100083,China;
4. Research institute of Yunnan Geophysical Exploration Company,Southwest Petroleum Bureau,Kunming City,Yunnan Province,650233,China;
5. Research Institute of Geology Exploration and Development,Chuanqing Drilling Engineering Ltd.,Chengdu City.Sichuan Province,610051,China
Abstract：The oilfield in TKT-NGS area of northeast OUED MYA basin in Algeria is a structure-lithology reservoir and the main target zone Si is featured a braided river deposition with thin sand layer and strong lateral heterogeneity.Faced with the characteristic of geology and structure in this area,the multi-wavelet decomposition and reconstruction technique was applied to describe the distribution of reservoirs and predict the oil-bearing range of reservoir.The interpretation steps by the technique were summarized below:(1) conducting multi-wavelet seismic trace decomposition for the seismic data,(2) screening and synthesizing the new seismic data which is more favorable for direct reservoir interpretation,(3) calculating seismic wave frequency attenuation coefficient gathers and(4) extracting the seismic components and screening the new component that is more effective for the direct reservoir interpretation in accordance with the reservoir data obtained from the drilling.The application result showed the better effectiveness of the technique in reservoir interpretation.
