| 摘要: |
| 建立了复合射孔相似模拟试验装置,利用该试验装置观测了不同高能气体压力及压士液高度作用下的压井液 运动状态，并对实测压力曲线及压井液的受力状态进行了分析。结果表明:井底的高压气体与上部压井液之间的作. 用是一个复杂的气液作用过程，是多种因素共同作用的结果;在高压气体与上部液体作用过程中,底部作用层位压 力剧烈变化，压井液高度越高，底部高压气体的压力越大,高压持续时间越长;压井液的受力是逐层传播的，受液体 压缩和摩擦阻力的影响,压力在传播过程中不断衰减;采用在压井液上液面封挡的方法，能够提升复合射孔过程中 的作用压力,增加高能气体能量的利用率,但也会造成瞬时的冲击高压。 |
| 关键词: 复合射孔 压井液 气体压力 运动机理 |
| DOI： |
| 分类号: |
| 基金项目:教育部“长江学者和创新团队发展计划”项目(IRTO411) |
|
| Movement mechanism experiment of top control fluid in compound perforation |
|
UU Gong-hui1,2,ZHAO Xu1
|
|
(1. MOE Key Laboratory of Petrokwn Engineering in China University of Petroleum t Beijing 102249 f China;2. President Office, Beijing Union University,Beijing 100010, China )
|
| Abstract: |
| A new similar simulation testing device of compound perforation was developed. Tlie movement phenomenon of control fluid was observed under the different control fluid height and different high energy gas pressure by using this device, and the pressure curves and force that erects on control fluid were analyzed. The results show that the interaction between high pressure gas and control fluid is a very complicated process，which is the result that many factors act together. In the gas-liquid interaction process, the bottom gas pressure changes tempestuously, the higher the fluid column hei^it is，the higher the gas pressure is, and the longer the lime bottom gas pressure duration is. The force that erects on fluid column spreads layer by layer, the pressure wave decreases constantly due to the influence of fluid compressibility and friction with wellbore. Moreover, the method that installing an packer on the top of fluid column can promote the bottom gas pressure and pressure duration，increase the utilization of gas energy, however, instantaneous shocking high pressure will accompany with that |
| Key words: compound perforation control fluid gas pressure movement mechanism |
