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根据目前国内在地层孔隙压力预测及检测方面存在的困难和问题,提出了地层孔隙压力随钻检测新方法——岩石强度法。通过实验建立了合理的岩石强度计算模型;利用现场大量的随钻录井数据和测试数据建立了岩石强度与地层孔隙压力的关系模型,并对地层孔隙压力的具体计算方法作了阐述。开发研制出地层孔隙压力综合评估软件系统。新疆塔西南地区3口井和渤海油田4口井中应用表明,新方法检测精度高,适应性强。
According to the current difficulties and problems in the prediction and detection of formation pore pressure in China, a new method of rock pore pressure detection along with rock drilling is proposed. Through the experiment, a reasonable rock strength calculation model was established. Based on the large number of well logging data and test data in the field, the relationship between rock strength and formation pore pressure was established. The calculation method of formation pore pressure was also described. Developed a comprehensive evaluation system of pore pressure. Three wells in the southwest of Xinjiang and four wells in the Bohai Oilfield indicate that the new method has high detection precision and strong adaptability.