Analysis on Prediction Methods for Formation Pore Pressure under Multiple Pressure Formation Mechanisms

There is abnormal fluid pressure widely distributed in Yinggehai-Qiongdongnan Basin, with zones extending from different depths, and the formation causes of here are complicated. It one three HTHP offshore regions world at present. Hence, drilling this region very difficult. discovered practices recent years that, due to multiple mechanisms region, conventional prediction model based on under-compaction theory insufficient explain high suddenly occurring middle shallow layer diapiric structure which large deviation pore before drilling. Based basic principle improved Fillippone method three-dimensional precision seismic velocity field geologic modeling inversion, authors build a dimensional target block, extract slice horizon across well, analyze other source transmission possibly caused by connectivity, import them into mathematical prediction, so as attain purpose improving prediction. This has been well applied pre-drilling for block South China Sea, reaching precisi above 95%.