关键词: 测井, 地震, 井底以下, 外推, 压力预测

Abstract: Undrilled formation pressure prediction is very complex. There are some methods available for predicting pressure,such as extrapolation by adjacent well,regional pressure analysis and seismic velocity spectrum analysis. But in oceanic area, some difficulties arise because of low well spacing density and limited information under serface. This paper introduced a new way to pressure prediction in undrilled formation by means of extrapolating sonic logging using artificial neural network while combining halfway log data with seismic data. This new technic and the procedure were presented in this paper. The extrapolating prediction for some oceanic wells in a area brought good result. It shows this research work is feasible and valuable.

Key words: log data, seismic data, undrilled formation, extrapolation, pressure prediction