Experiment research of water alternating gas immiscible displacement EOR technology in fractured low permeability reservoir 低渗透裂缝性油藏水气交注非混相驱提高采收率研究
The elastic guided waves are generated by application of the static bias magnetic field and the dynamic magnetic field which is induced by the alternating current passing the exciting coil, and the elastic guided wave displacement formula is derived by its equation of motion in the steel pipe. 在静态偏置磁场和通过传感器激励线圈交变电流形成的交变磁场作用下,管道中产生弹性导波,由弹性导波运动方程,推导其位移表达式,由位移求出应变。
Conclusion With an alternating hand movement task, the present fMRI study not only demonstrated the displacement and distortion of the M1 in the tumor affected hemisphere, but also revealed a new pattern of functional reorganization, which appears to involve a distributed network throughout the whole brain. 结论采取双手交替运动模式,fMRI不仅显示了受累侧运动区的变形与移位,而且揭示了一种新的功能重组模式,即运动功能重组可能涉及分布于全脑的整个神经网络。
There is initial start pressure difference whatever for water flooding or water/ gas alternating displacement. So, increasing injection pressure should be done to start gas injection. 不论是水驱还是水气交替,都存在初始启动压差,要考虑增大注入压力以启动注气工程。
By using Schwarz ′ s alternating method, the displacement field is gained of surrounding rocks of two tunnels with arbitrary shapes after random times of iteration, and it is found that the precision of the displacement results is very high. 利用Schwarz交替法,得到了任意次迭代后两任意形状洞室的围岩位移场,通过精度分析发现:20次迭代后的位移结果精度非常高。
This case of study also shows water alternating gas displacement in horizontal wells is the best way for both storing CO2 in geological way and enhancing recovery factor of oil and gas fields. 研究结果还表明,水平井水气交替驱是地质储存CO2、提高石油采收率的最优方法,该方法累计产油量最大,储集的CO2也最多。
Aiming at this issue, CO2 was injected into a certain oilfield to carry on water alternating gas displacement by adopting Eclipse software to accomplish correlation study through numerical simulation on six different sets of developing adjustment schemes. 针对这一问题,应用Eclipse软件对某油田注入CO2进行水气交替驱等6套开发调整方案进行了数值模拟对比研究。