The impact of neglected well bore pressure losses due to fluid accumulation and kinetic energy in the fundamental energy equation used for derivation of flowing bottom-hole pressure in horizontal well have been conceived to be a considerable reason for the discrepancy between computed rates from the existing models and actual rates got from production tests. In the study, a new model that investigate all possible well bore pressure losses effect on the production rate of a horizontal oil well have been established. The newly developed model has been validated using the field data obtained from the literature and outcome got from the new model yields more satisfactory results. A more realistic results that evident all flow phenomena in petroleum production well include the initial unsteady, pseudo-steady and steady state flow condition hence flow rate at any given production time has been established for flow of oil along horizontal production well. The concept is useful to estimate flowing bottom-hole pressure and analyze its effect on production rate value of a horizontal oil well without ignoring any pressure resisting terms in the governing thermodynamic equation. The unsteadiness fluid flow period that generally observed after shut in a well have also been demonstrated. Closer agreement between the results obtained using the newly developed model and real life field measurement was observed when compared with the previous model in the literature. The study gives reservoir engineer an exact and helpful device for estimating and assessing horizontal oil well production rate.

在现有水平模型推导水平井底流动压力所用的基本能量方程中，由于流体蓄积和动能而导致的忽略井眼压力损失的影响被认为是造成计算速率之间存在差异的重要原因和实际费率是通过生产测试得出的。在研究中，已经建立了一个新模型，该模型研究了所有可能的井筒压力损失对水平油井产量的影响。使用从文献中获得的现场数据验证了新开发的模型，并且从新模型获得的结果产生了更令人满意的结果。更为现实的结果表明，石油生产井中的所有流动现象都包括初始的不稳定，因此，对于沿水平生产井的油流，已经建立了在任何给定生产时间内的准稳态和稳态流动条件。该概念可用于估算流动的井底压力并分析其对水平油井的生产速率值的影响，而无需忽略控制热力学方程式中的任何抗压项。还证实了通常在关闭井后观察到的不稳定流体流动时间。当与文献中的先前模型进行比较时，观察到使用新开发的模型获得的结果与现实生活中的测量结果之间的一致性更高。该研究为油藏工程师提供了一种精确而有用的装置，用于估算和评估水平油井的生产率。