CAJ | 학술논문

毛细管测压的基本原理是通过井口压力准确推算井底的压力。选用最新的氮气状态方程编写物性计算程序，以保证物性计算的准确性；根据现场测压工艺建立相应的毛细管压力传递数学模型，并采用Runge-Kutta方法求解微分方程，克服了有限差分计算精度较低的缺点；在进行温度补偿的同时，考虑了气体流动对测压结果的影响。模型计算结果表明，所用测压模型可以大大提高毛细管测量的精度。
모세관측압적기본원리시통과정구압력준학추산정저적압력。선용최신적담기상태방정편사물성계산정서，이보증물성계산적준학성；근거현장측압공예건립상응적모세관압력전체수학모형，병채용Runge-Kutta방법구해미분방정，극복료유한차분계산정도교저적결점；재진행온도보상적동시，고필료기체류동대측압결과적영향。모형계산결과표명，소용측압모형가이대대제고모세관측량적정도。
The fundamental of capillary piezametry is accurately calculating the pressure of bottom hole through the wellhead pressure. The program of physical property calculation is written by selecting the latest equation of state for Nitrogen, to ensure the accuracy of physical property calculation. Corresponding transfer mathematical model of capillary pressure is established in accordance with on-site technological process of pressure measurement, and the differential equation is solved by adopting Runge-Kutta method, thus the shortcoming of lower accuracy of finite difference calculation is overcome. When temperature compensation is conducting, the influence of gas flowing on the result of pressure measurement is also considered. The model calculation results demonstrate that the model proposed provides remarkable improvement for accuracy of capillary piezametry.