多层油藏水驱驱替效率计算新方法
|
摘要
准确计算砂层间由不可渗透页岩或致密砂岩层分隔多层油藏水驱驱替效率可以为高效、合理开发油藏提供理论依据。为此,应用达西定律和Buckley-Leverett方程找出了各层突破时油藏总体含水率的确定方法,并通过约束最小二乘法回归得到了含水率方程,最终结合Welge-Craig方程得出了一种计算多层油藏水驱驱替效率的新方法,并通过矿场实例验证了该方法对于多层油藏水驱开发中后期驱替效率预测的适用性。
Accurate calculation of water displacement efficiency in layered reservoirs separated by impermeable shale or tight sand can provide theoretical basis for efficient and rational development of the reservoir. Hence, a method for determining total water cut at breakthough is given by using Darcy’s law and Buckley-Leverett equation, and the equation of water cut is derived by regression through constraining least square method. Finally, a new method of calculating water displacement efficiency for layered reservoir is derived with combination of Welge-Craig equation. The applicability of this method has been verified through field application in prediction of displacement efficiency in mid-late stage of waterflooding for layered reservoirs.
Accurate calculation of water displacement efficiency in layered reservoirs separated by impermeable shale or tight sand can provide theoretical basis for efficient and rational development of the reservoir. Hence, a method for determining total water cut at breakthough is given by using Darcy’s law and Buckley-Leverett equation, and the equation of water cut is derived by regression through constraining least square method. Finally, a new method of calculating water displacement efficiency for layered reservoir is derived with combination of Welge-Craig equation. The applicability of this method has been verified through field application in prediction of displacement efficiency in mid-late stage of waterflooding for layered reservoirs.
引文
[1]Norman C Wardlaw.The effects of pore structure on dis-placement efficiency in reservoir rocks and in glass micro-models[J].SPE8843,1980:345~354.
[2]鄢捷年.油藏岩石润湿性对注水过程中驱油效率的影响[J].石油大学学报(自然科学版),1998,22(3):43~46.
[3]Buckley S E,Leverett M C.Mechanism of fluid displace-ment in sands[J].Trans AIME,1942,46:107~116.
[4]Welge H J.Predicting displacement efficiency from water-cut or gas-cut field data[J].JPT,1975,August:944~948.
[5]Hearn C L.Simulation of stratified waterflooding by pseudorelative permeability curves[J].JPT,1975,July:805~813.
[6]Zhang Shengzong,Hu Jianguo,Li Zhongxing,YuKeqiang.A Calculation of pseudo relative permeabilitycurve using reservoir performance data[C].SPE20791,1990:1~19.
[7]马贤圣,呼舜兴,耿师江,等.多层水驱实验在桥口油田开发中的应用[J].西安石油学院学报(自然科学版),2003,18(6):48~50.
[8]石玉梅,刘雯丽,姚逢昌,等.用地震法监测水驱薄互层油藏剩余油的可行性研究[J].石油学报,2003,24(5):52~56
[9]达克L P著.见阎建华,等译.油藏工程实践[M].北京:石油工业出版社,2003,298~299.
[2]鄢捷年.油藏岩石润湿性对注水过程中驱油效率的影响[J].石油大学学报(自然科学版),1998,22(3):43~46.
[3]Buckley S E,Leverett M C.Mechanism of fluid displace-ment in sands[J].Trans AIME,1942,46:107~116.
[4]Welge H J.Predicting displacement efficiency from water-cut or gas-cut field data[J].JPT,1975,August:944~948.
[5]Hearn C L.Simulation of stratified waterflooding by pseudorelative permeability curves[J].JPT,1975,July:805~813.
[6]Zhang Shengzong,Hu Jianguo,Li Zhongxing,YuKeqiang.A Calculation of pseudo relative permeabilitycurve using reservoir performance data[C].SPE20791,1990:1~19.
[7]马贤圣,呼舜兴,耿师江,等.多层水驱实验在桥口油田开发中的应用[J].西安石油学院学报(自然科学版),2003,18(6):48~50.
[8]石玉梅,刘雯丽,姚逢昌,等.用地震法监测水驱薄互层油藏剩余油的可行性研究[J].石油学报,2003,24(5):52~56
[9]达克L P著.见阎建华,等译.油藏工程实践[M].北京:石油工业出版社,2003,298~299.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心