摘要: |
为了准确预测低渗透油藏油井的产能,基于达西公式,考虑高压和低压状态下油藏流体性质以及启动压力梯 度对渗流规律的彭响,推导了新的低渗透油藏油井组合型产能预测模型。给出了极限井底流压和产量拐点的求解 方法,分析了启动压力梯度、流体性质等因素对低渗透油藏油井产能的影响将新模型与现有模型的预测结果进行 了对比,并用实测数据进行了验证。结果表明,新模型预测出的流入动态关系更接近于实测数据,准确度较高,能用 于工程计算。 |
关键词: 低渗透油藏 达西公式 启动压力梯度 产能预测 |
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New prediction method of oil well deliverability of low permeability reservoir |
HE Yan-feng1,WTJ Xiao-dong1,HAN Zeng-jun2,ZHAO Jun3,ZHANG Li-hui4
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(1.MOE Key Laboratory of Petroleum Engineering in China Univenity of Petroleum, Beijing 102249,China;2.9th Oil Production Plant of Daqing Oilfield Companyt PetroChina, Daqing 163853, Heilongjiang Province, China;3. Departmem of fntematianal Cooperstien of China Unued Coalbed Metkane Corporation Umttedf Beijing 100011, China ,;4. Drilling and Production Technology Research Institute of Qinghai Oilfield Company ^ PetroChina T Dunhuang 736202, Gansu Province, China)
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Abstract: |
In order to predict oil well deliverability of low permeability reservoir accurately, a combination deliverability prediction model was presented based on Darcy law. The effecta of reservoir fluid property in high and low pressure and the starting pressure gradient c?n the |>ercplBtiOTi laws were taken into account in this model- The solution methods of ultimate bottom-hole producing pre&sure and production tuming point in inflow performance relation curve were given out. And ihe effects of reservoir fluid property and the starting pressure gradient on the oil well deliverability in low permeability reservoir ware analyzed. The prediction results of the new model were compared with that of old models and verified with real data. It ia proved that the new method has high accuracy and. can be used in engineering calcula.tton. |
Key words: Low permeability reservoir Darcy equation Btaiting pressure gradient deliverability prediction |