The thermo-mechanical stress and deformation of water-cooled gun barrel during burst firing are studied by finite element analysis (FEA). The problem is modeled in two steps: 1) A transient heat transfer analysis is f...The thermo-mechanical stress and deformation of water-cooled gun barrel during burst firing are studied by finite element analysis (FEA). The problem is modeled in two steps: 1) A transient heat transfer analysis is first carried out in order to determine temperature evolution and to predict the residual temperatures during the burst firing event; 2) The thermo-mecha- nical stresses and deformation caused by both the residual temperature field and the gas pressure are then calculated. The results show that the residual temperature field tends to a steady state with the increasing of rounds. The residual temperature field has much effect on the gun barrel stress and deformation, especially on the assembly area between barrel and water jacket. The gage between the barrel and water jacket is the critical factor to the thermo- mechanical stress and deformation. The results of this analysis will be very useful to develop the new strength design theory of the liquid-cooled gun barrel.展开更多
针对合水油田庄XX区长8储层油井“微裂缝+高渗带”水淹现状,结合储层地质特点、动态开发特征等因素,开展堵水和原层补孔压裂技术相结合的储层改造试验。庄XX区长8平均油层厚度17.9 m,平均射孔段6.4 m,储层整体打开程度较低,为35.7%,这...针对合水油田庄XX区长8储层油井“微裂缝+高渗带”水淹现状,结合储层地质特点、动态开发特征等因素,开展堵水和原层补孔压裂技术相结合的储层改造试验。庄XX区长8平均油层厚度17.9 m,平均射孔段6.4 m,储层整体打开程度较低,为35.7%,这为“堵水和原层补孔压裂”提供了基础条件。2019—2021年,堵水压裂实践表明,在升压1~2 MPa、酚醛树脂体系、堵剂用量650 m 3条件下,效果较好,原层压裂改造参数为小排量1.6~1.8 m 3/min、低砂比20%、低砂量16~20 m 3,可达到控水增油目的。此方法充分发挥了油藏潜力,为同类油藏高含水井治理提供了借鉴与指导。展开更多
文摘The thermo-mechanical stress and deformation of water-cooled gun barrel during burst firing are studied by finite element analysis (FEA). The problem is modeled in two steps: 1) A transient heat transfer analysis is first carried out in order to determine temperature evolution and to predict the residual temperatures during the burst firing event; 2) The thermo-mecha- nical stresses and deformation caused by both the residual temperature field and the gas pressure are then calculated. The results show that the residual temperature field tends to a steady state with the increasing of rounds. The residual temperature field has much effect on the gun barrel stress and deformation, especially on the assembly area between barrel and water jacket. The gage between the barrel and water jacket is the critical factor to the thermo- mechanical stress and deformation. The results of this analysis will be very useful to develop the new strength design theory of the liquid-cooled gun barrel.
文摘针对合水油田庄XX区长8储层油井“微裂缝+高渗带”水淹现状,结合储层地质特点、动态开发特征等因素,开展堵水和原层补孔压裂技术相结合的储层改造试验。庄XX区长8平均油层厚度17.9 m,平均射孔段6.4 m,储层整体打开程度较低,为35.7%,这为“堵水和原层补孔压裂”提供了基础条件。2019—2021年,堵水压裂实践表明,在升压1~2 MPa、酚醛树脂体系、堵剂用量650 m 3条件下,效果较好,原层压裂改造参数为小排量1.6~1.8 m 3/min、低砂比20%、低砂量16~20 m 3,可达到控水增油目的。此方法充分发挥了油藏潜力,为同类油藏高含水井治理提供了借鉴与指导。
