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蒸汽辅助重力泄油(SAGD)技术是油砂开发中应用最广泛的技术,但其开发效果易受到诸如夹层、水层等复杂地质条件的制约.首先,本文通过分析加拿大L油田已投产SAGD井对的生产动态,结合数值模拟结果,研究了HPVH(烃柱高度)、夹层、层间水层和顶水层对SAGD高峰产能的影响规律,并确定了开发界限;其次,通过非线性多元回归方法,建立了高峰产能与影响因素之间的经验公式,并与巴特勒公式计算结果进行了对比;最后,通过蒙特卡罗模拟方法确定了影响高峰产能的主控因素.结果表明,HPVH为影响SAGD高峰产能的主控因素,各因素对高峰产能的影响程度大小排序为HPVH、夹层厚度、层间水厚度、水平井长度和顶水厚度.研究结果为油砂SAGD开发动用储量筛选和井位部署提供了合理依据.
Steam assisted gravity drainage (SAGD) technology is the most widely used technique in the development of oil sands, but its development effect is easily restricted by complicated geological conditions such as interlayer and water layer.Firstly, by analyzing the SAGD wells in L field of Canada Based on the production dynamics and the results of numerical simulation, the influence laws of HPVH (hydrocarbon column height), interlayer, interlayer water layer and top water layer on the peak production capacity of SAGD were studied and the development limits were determined. Secondly, by nonlinear multiple regression Method was used to establish the empirical formula between the peak productivity and the influencing factors and compared with the Butler’s formula. Finally, the main controlling factors affecting the peak productivity were determined by the Monte Carlo simulation method.The results showed that HPVH The main controlling factors of SAGD peak capacity and the influence degree of each factor on peak productivity are HPVH, interlayer thickness, interlayer water thickness, horizontal well length and top water thickness.The results are as follows: Deployment provides a reasonable basis.