Dual-inversion reservoir prediction of 3D multi-wave seismic data in Sulige Gas Field
Shi Songqun1, Shi Xiaoying1, Liu Qiuliang2, Miao Xiaogui3, Sheng Liang3
1. Research Institute of Petroleum Exploration and Development,Changqing Oilfield,Xi'an,Shaanxi 710018,China;
2. Northwest Branch,Research Institute of Petroleum Exploration and Development,PetroChina,Lanzhou,Gansu 730020,China;
3. CGG Veritas Beijing,Beijing 100004,China
Abstract：Dual-inversion reservoir prediction of 3D multi-wave seismic data is based on AVO principle.Its inputs are PP wave and PS wave angle gathers(or post-stack data).Inversion syntheses time domain and amplitude domain information.Using an initial model constrained inversion the results are consistent with low frequency initial VP/VS trend.Specific steps are as follows: ①Matching VPP/VPS horizons in interest layers;finding out its VP/VS;and compressing VPS data into PP time domain.②By simulated annealing and varying parameters constraint equations continuously converges to minimum while global optimal VP/VS is obtained.③Using further inversion of the VP/VS,VP,VSand density are obtained.④Finally poisson's ratio,Lame coefficient and elastic parameters such as fluid factor are calculated.After converted wave static correction,wave field separation,velocity analysis,and amplitude recovery,this dual-inversion gets better quality seismic multi-component data in Sulige Gas Field.The results show clearer reservoir heterogeneity in target layers and identify gas-rich beds.
史松群, 石晓英, 刘秋良, 苗晓桂, 沈亮. 三维多波地震双反演储层预测技术在苏里格气田的应用[J]. 石油地球物理勘探, 2012, 47(4): 592-597.
Shi Songqun, Shi Xiaoying, Liu Qiuliang, Miao Xiaogui, Sheng Liang. Dual-inversion reservoir prediction of 3D multi-wave seismic data in Sulige Gas Field. OGP, 2012, 47(4): 592-597.
