关键词: 探井, 孔隙压力, 破裂压力, 压力预测, 测井解释

Abstract: This paper discusses methods used to estimate formation pressure in the scientific exploratory well. The optimum method was established for pressure calculation before,while and after drilling,which made the best use of geologic, seismic,logging, drilling,leak-off test,RFT and well kicks data,making the pressure calculation and analysis more systematic and more precise with each stage of drilling processes. The associated software package was developed to process formation pressure for practical wildcat planning and drilling. The difficulty of establishing accurate normal trend line was solved by recalculation and revision using RFT and well kicks data. MWD/LWD or log data was analyzed thoroughly to give as much information as possible for pressure calculating.Some models and methods for key parameters conversion (such as bulk density,shear wave velocity,shale contents and porosity both in permeale and impermeable formation)were developed in case of wanting, calculating from known measurements.

Key words: wildcat, pore pressure, fracture pressure, pressure prediction, log interpretation