HR: 1340h
AN: H13D-1353    [Abstracts]
TI: Reservoir characterization using ray-theory technique
AU: * Horiuchi, Y
EM: horiuchi@earth.kumst.kyoto-u.ac.jp
AF: Yu Horiuchi, Room 256 (2nd Floor), Engineering Building-#01, Yoshida-hommachi, Sakyo-ku, , kyoto, 606-8501 Japan
AU: Onishi, K
EM: onishi@earth.kumst.kyoto-u.ac.jp
AF: Yu Horiuchi, Room 256 (2nd Floor), Engineering Building-#01, Yoshida-hommachi, Sakyo-ku, , kyoto, 606-8501 Japan
AU: Matsuoka, T
EM: matsuoka@earth.kumst.kyoto-u.ac.jp
AF: Yu Horiuchi, Room 256 (2nd Floor), Engineering Building-#01, Yoshida-hommachi, Sakyo-ku, , kyoto, 606-8501 Japan
AB: In petroleum engineering, it is a very important theme to clarify the fluid flow behavior in an oil reservoir and the geologic structure, in order to drill and produce oil more efficiently. However, in the oil field, we usually obtain the structure only around a well, and the entire geologic structure of the reservoir is predicted from the well data. In this research, we use a streamline approach. We make a structural model that reflects reservoir character, and perform an inverse analysis of the permeability or porosity distribution. This approach utilizes only the data that is obtained at the well. In streamline approach, we first perform the streamline simulation using finite difference method to simple structural models of the oil reservoir we make. From this streamline simulation, we can obtain the dynamic data, that is, transient pressures, and tracers, etc. using this dynamic data, we then construct a reservoir characteristic model of the permeability or porosity distribution. This streamline approach pays attention to the similarity of streamlines and seismic ray tracing. We use the technique of seismic tomography and waveform imaging, integrating data into reservoir models. In particular, we utilize the concepts of asymptotic ray theory, which is a very efficient technique. This method needs few forward simulations to solve the inverse problem. So, we can estimate a reservoir model much faster than current techniques that require multiple flow simulations.
DE: 0545 Modeling (4255)
DE: 0935 Seismic methods (3025, 7294)
DE: 1857 Reservoirs (surface)
DE: 3653 Fluid flow
DE: 7270 Tomography (6982, 8180)
SC: Hydrology [H]
MN: Fall Meeting 2005