Phenomena in inter-bed reservoir interpretation on seismic slices：an example of 3D geological model
Li Guofa1, Wang Yajing1, Xiong Jinliang2, Yue Ying2, Tian Naxin3
1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China;
2. Dagang Oilfield Company, PetroChina, Tianjin 300280, China;
3. Research Institute of Petroleum Exploration & Development, SINOPEC, Beijing 100083, China
Abstract：Based on analysis of interference effect of inter-bed layers, problems and potentials of reservoir interpretation on seismic slices are analyzed through a 3-D geologic model experiment. The following observations are obtained from the experiment: 1Thin inter-bed sand layers can be more easily identified and detected on seismic slices than seismic sections; 2The distribution and source direction of different sand bodies can be relatively reliably detected on seismic slices, and RMS amplitude slice has a good positive correlation to the accumulate thickness of the sand bodies when the accumulative thickness is less than 1/4 wavelength; 3"zero-value time" seismic slices of one sand body have no attribution of the sand body itself, and the vertical distance of sand bodies in different depths can be derived from the difference of "zero-value time" slices, which are helpful to recognize the sedimentary evolution and superimposed relationship of sand layers in different depths; 4Each sand body has more than one "zero-value time" and the "zero-value time" seismic slices appear periodically, and "zero-value time" seismic slices well depict the spatial distribution of single sand layer, however the time sequence of "zero-value time" slices is reverse to the depth sequence of sand bodies.
