Reservoir Prediction for Ocean or New Adventure Areas
OceanPro is a new product of LandOcean developed on the unified EPoffice platform after several years
of research and development
In deep water or a new adventure area, it often happens that just few wells are available, or even no well drilled. To take more advantage of the seismic data for reservoir characterization, some locations of geologic interest are selected to perform fine waveform inversion and P-wave velocity, S-wave velocity and density data can be estimated at these location from pre-stack seismic data by genetic algorithm (GA) optimization. These procedure is called pseudo-well building. With these data acting as logging curves, model-based poststack or prestack inversion become feasible for higher resolution reservoir characterization with few available wells. This technology demonstrates promising results of far higher resolution in areas such as deep water where few wells are available.
GA based prestack waveform inversion to build pseudo wells
Genetic algorithm is based on the principle of natural selection and stochastic search algorithm. By encoding the parameters of the model space for optimization, the geological model that best matches the field seismic records is searched in all the possible geological model and random choice serves as a tool to guide the search process toward more efficiency. In one word, the GA calculation involved is straightforward and powerful as well.
Pseudo wells constrained inversion in no-well areas
Pseudo & real wells jointly constrained inversion in areas of few wells