用全波列测井资料预测地层破裂压力的应用研究

预测地层的破裂压力在钻井施工、钻井液的选取及水力压裂等方面有着重要的意义。本文系统介绍了利用声波全波资料和岩石力学理论预测地层的破裂压力和压裂裂缝高度的方法．用该方法对吉林某区块一口井的破裂压力和压裂裂缝高度进行了预测，并通过现场资料进行了验证，结果表明破裂压力预测的精度是比较高的，误差控制在4％以内，从而提供了比较合理的钻井液密度参考值和人工压裂时的压力参考值。由此可见，该方法对合理选取钻井液密度和压裂施工具有重要的指导意义。也说明了在破裂压力预测模型中，引入了广义构造应力系数的合理性。

THE APPLICATION STUDY OF PREDICTING FRACTURING PRESSURE WITH FULL WAVETRAIN ACOUSTIC LOOGING DATA

It is very important to predict the fracturing pressure of formation in drilling construction, choosing drilling fluid, fracturing construction and other aspects. The method to predict the fracturing pressure and fracture height with full wavetrain acoustic logging data and rock mechanic theory is introduced in this paper. And it was applied to a well in Jilin Oil Field. The fracturing pressure and fracture height were computed. The result was validated by local data of water fracturing measurement. The predicted result is very close to the local result and the error is within 4 percent. And the reasonable value of drilling fluid density and fracturing pressure is obtained. Therefore, it is an effective method in choosing drilling fluid density and instructing fracturing construction, and it is rational to induct generalized structural stress coefficient in predicting model of fracturing pressure.