CAJ | 학술논문

针对油井动液面实时监测困难和基于地面功图推算误差大的问题，以油井地面示功图为条件，运用一维带阻尼波动方程求解泵功图；并研究了泵功图曲线各点的曲率计算模型、固定阀和游动阀开闭点确定方法以及泵功图上下冲程载荷差的计算方法。结合井筒及环空流体压力分布计算相关式，建立了基于泵功图计算动液面深度的数学模型。经51口油井的计算分析，计算动液面深度与实测动液面深度的最大相对误差为14.84％，最小相对误差为0.48％，平均相对误差为3.61％；相对误差在10％以内的有48口，占计算总井次的94.1％。研究结果表明所建立的计算模型具有较高的精度，能够实现了油井动液面的实时、准确计量，提高了油井生产分析的及时性，有利于油田数字化和信息化建设。
침대유정동액면실시감측곤난화기우지면공도추산오차대적문제，이유정지면시공도위조건，운용일유대조니파동방정구해빙공도；병연구료빙공도곡선각점적곡솔계산모형、고정벌화유동벌개폐점학정방법이급빙공도상하충정재하차적계산방법。결합정통급배공류체압력분포계산상관식，건립료기우빙공도계산동액면심도적수학모형。경51구유정적계산분석，계산동액면심도여실측동액면심도적최대상대오차위14.84％，최소상대오차위0.48％，평균상대오차위3.61％；상대오차재10％이내적유48구，점계산총정차적94.1％。연구결과표명소건립적계산모형구유교고적정도，능구실현료유정동액면적실시、준학계량，제고료유정생산분석적급시성，유리우유전수자화화신식화건설。
For the difficulty of the well dynamic liquid level real-time monitoring and the problem of the great error that the figure calculated based on the ground dynamometer card, the ground dynamometer card as the condi-tion was taken.The one dimensional volatility equation with damping was used to get the pump indicator diagrams, and studied the curvature calculation model of the pump dynamometer card curve at every point.The determination method of the opening and closing point of fixed valve and traveling valve, the calculation method of up and down load difference of pump dynamometer card, combining with wellbore and annulus fluid pressure distribution calcula-tion related type, the mathematical model was established that calculate the dynamic liquid level depth based on pump dynamometer card.By the calculation analysis of 51 wells, the maximum relative error between the calculat-ed dynamic liquid level depth and the measured liquid level depth is 14.84%, the minimum relative error is 0.48%, the average relative error is 3.61%.There are 48 wells that the relative error is within 10%, account for 94.1%of the total calculated wells.The results show that the established calculation model has higher precision, could realize the real-time, accurate measurement of the dynamic liquid level of oil wells, improve the timeliness of the production analysis of oil wells, be helpful for the digitization and information construction of oilfield.