空气钻井最小注气量和地层出水量关系研究
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摘要
空气钻井作为一种新的钻井方式,以其减少油气层伤害、评价油气藏、提高机械钻速、有效控制漏失以及减少压差卡钻等优点在全世界范围内得到越来越多的应用。但由于其特殊性,使之不能使用于所有井段,空气钻井的缺点是存在井壁失稳和携带岩屑困难,它的主要障碍就是地层出水。An-gel最小动能模型计算结果虽然和油田实际趋于一致,但比实际结果要低。本文通过修正Angel模型的摩阻系数,并用实际温度代替平均温度,建立了空气钻井最小注气量的方程。在不考虑岩屑吸水膨胀的情况下,将地层出水量转化成当量机械钻速,得到了地层出水量和最小注气量的方程式,为地层出水条件下空气钻井参数的设计和应用提供了参考和指导。
Air drilling is a new drilling technology,which nor only has advantage in decreasing damage of hydrocarbon reservoir,appraising reservoir,improving penetration rate,but also in avoiding effectively leakage and decreasing probability of drilling pipe sticking for pressure difference.Air drilling is widely used both in China and abroad for its superiority.Destabilization of borehole wall and carrying cuttings are the disadvantages of air drilling,and formation water production is the main problem.Although the result of Angel minimum kinetic energy model is consistent with the actual situation in the oil field,it is less than the actual result of the oil field.Being started with Angel model of adjusted friction coefficient and replacing the average temperature by effective temperature,the equation is obtained about minimum volume flow rate of air drilling.Based on formation water production is converted into the equivalent penetration rate,the equation of formation water production and air volume rate is obtained without considering cuttings swell.The results will play an important role in guiding design and application of air drilling with formation water production.
Air drilling is a new drilling technology,which nor only has advantage in decreasing damage of hydrocarbon reservoir,appraising reservoir,improving penetration rate,but also in avoiding effectively leakage and decreasing probability of drilling pipe sticking for pressure difference.Air drilling is widely used both in China and abroad for its superiority.Destabilization of borehole wall and carrying cuttings are the disadvantages of air drilling,and formation water production is the main problem.Although the result of Angel minimum kinetic energy model is consistent with the actual situation in the oil field,it is less than the actual result of the oil field.Being started with Angel model of adjusted friction coefficient and replacing the average temperature by effective temperature,the equation is obtained about minimum volume flow rate of air drilling.Based on formation water production is converted into the equivalent penetration rate,the equation of formation water production and air volume rate is obtained without considering cuttings swell.The results will play an important role in guiding design and application of air drilling with formation water production.
引文
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[15]贺茹.抽油机井泵系统效率与排量系数的关系研究[J].大庆石油地质与开发,2006,25(3):76-78.
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[2]Gerald E.Air Drilling and Crooked Hole Problems[R].SPE9529.
[3]Tian Shi-feng.A New Method of Estimating Mixture Density in AirDrilling[R].SPE24960.
[4]Minamit K,Shoham O.Multiphase Science and Technology for Oil/Gas Production and Transport[R].SPE27958.
[5]Lopez D,Pduchet-Suchaux.Performances of Transient Two-phase flowModels[R].SPE 39858.
[6]Li Ying-chuan,Du Zhi-min.A New Numerical Model for Two-phaseFlow in Liquid-cut Gas Wells[R].SPE 35612.
[7]Angel R R.Volume Requirements for Air or Gas Drilling[J].AIMME,Vol.210,1975.
[8]于永波.大庆长垣西部低渗透油田压裂工艺的改进方法[J].大庆石油地质与开发,2005,24(1):68-69.
[9]孔凡军,刘永贵.随钻压力温度测量系统的研究与应用[J].大庆石油地质与开发,2005,24(1):71-78.
[10]吕俊丰,刘朋学,林庆祥.地应力分析解释技术在压裂中的应用[J].大庆石油地质与开发,2005,24(2):64-66.
[11]王蔚,贾立莹,苏勇.海拉尔探区钻井完井过程的油气层保护技术[J].大庆石油地质与开发,2005,24(2):69-71.
[12]陈伟,段永刚,张健,等.基于井筒与油藏耦合机制的水平井试井设计[J].大庆石油地质与开发,2005,24(3):69-71.
[13]姜振海,万新德,赵长庆.注水井层间干扰测试技术探讨[J].大庆石油地质与开发,2005,24(5):62-63.
[14]田红,邓金根,蔚宝华.弱胶结砂岩油藏出砂量预测技术研究进展[J].大庆石油地质与开发,2006,25(2):61-64.
[15]贺茹.抽油机井泵系统效率与排量系数的关系研究[J].大庆石油地质与开发,2006,25(3):76-78.
[16]王治中,邓金根,赵振峰.井下微地震裂缝监测技术及压裂效果评价[J].大庆石油地质与开发,2006,25(6):76-78.
[17]高慧梅,姜汉桥,陈民锋.多孔介质孔隙网络模型的应用现状[J].大庆石油地质与开发,2007,26(2):76-79.
[18]张兴福,向阳,张云莲.钻、完井过程油层保护技术的研究与应用[J].大庆石油地质与开发,2007,26(3):100-103.
[19]王冬梅,吴广民.地层压力计算模型及其现场应用[J].大庆石油地质与开发,2007,26(4):84-87.
[20]王雷,张士诚.裸眼完井水平含水井分层流井筒压降计算研究[J].大庆石油地质与开发,2007,26(5):91-95.
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