Reservoir prediction using inversion constrained by faults model
Xu Liheng1, Li Jie1, Jiang Yan1, Xu Yancai2, Chen Xiansen1, Zhou Huajian1, Yang Liying1
1. Exploration and Development Research Institute,Daqing Oilfield Company Limited,PetroChina,Daqing,Heilongjiang 163712,China;
2. Zhuozhou Branch,PetroChina Engineering Cost Management Center,CNPC,Zhuozhou,Hebei 072751,China
Abstract：Using logging data and seismic data we build a structural model of the second block in the north LMD field in this study.The concrete steps are as follows: ①The top horizon in depth domain is built by geological divided layers from well data;the structural horizons in time domain is built using seismic interpreted structures;pay zone set-level velocity field is established by synthetic seismograms;and finally structural horizon data in the time domain are converted from that of depth domain.②With the restriction of seismic structural horizons,structural horizons in time domain of all pay zone sets are obtained.③The relationships among faults and horizons,and their distribution have been defined accurately by fault interpretation,so the transition of upper wall and foot wall formations accords with actual geologic situation.On the basis of structural model,the geostatistical inversion constrained by faults model is conducted.Comparing with the logging data interpretation,the reliability of sand bodies prediction with this inversion improves significantly.Using reservoir prediction results by this method the sand body distribution near the faults in sparse well spacing area has been confirmed,which guides the design of horizontal wells.
