【摘要】 对于高温高压盆地只有准确地预测其地层压力,才能确保钻井的安全,才能搞好油气地质研究。地层异常高压将导致地震波速度降低,因此可以利用地震速度法来预测地层的压力。利用层速度趋势线法和电阻率法进行钻前预测;利用改进的DC指数法、伊顿(EATON)法、岩石强度法和常规测井参数进行地层压力随钻监控;利用中途VSP和SWD(RVSP)技术及纵向宽带约束反演技术对地层压力进行随钻预测。这些技术应用于南海北部大陆架东方1-1、崖21-1等构造取得了很好的效果。更多还原

【Abstract】 In order to insure drilling safety and do well oil-gas geology research, Stratum pressure must be precise forecast for high temperature and high pressure basins. Stratum exceptional high pressure leads seismic wave velocity to low. At present, seismic wave velocity is popularly used to forecast the formation pressure. Many high precision velocity calculating or inversion methods were produced and applied, such as seismic tomography, seismic impedance inversion with log restriction, and so on. The effects of pressure forecasting while drilling and pressure monitor while drilling are good.更多还原