地层压力随钻监测和预测技术研究

地层压力随钻监测和预测技术是在钻进过程中利用随钻地层压力监测结果，对本井钻前的地震预测模型和结果进行修正。根据新修正的模型，对钻头下部未钻开地层的孔隙压力进行再预测，以此来提高地层压力的预测精度，为安全优质地完成钻井作业提供技术保证。如果上部井段已有测井数据，还可以用测井资料对地震资料进行校正。将该项技术应用在新疆巴楚地区琼００３井，试验结果表明，该技术能够大大提高地层压力监测和预测的精度，准确预报井下异常高压和复杂事故的发生，为现场钻井施工提供了可靠的技术依据。

TECHNOLOGIES FOR INSPECTING AND PREDICTI NG FORMATION PRESSURE WHILE DRILLING

The formation pressures determined while drilling are used to correct the model and result predicted by using seismic data before drilling. The new corrected model can be applied to predict the pore pressure of the undrilled formation. In this way, the predicting accuracy can be further raised. This technology can make use of log data from upper section of a well to correct the seismic data. An application to one well of Bachu area in Xinjiang region shows that this technology has a high prediction accuracy and can be used to predict abnormal formation pressure and kick accident.