A discussion about the method to study the effect of ambient pressure on hydraulic jetting

A discussion about the method to study the effect of ambient pressure on hydraulic jetting
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环境压力对水力喷射影响研究方法探讨

DOI:
10.1016/j.petrol.2016.10.043
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发表时间:
2017-01
影响因子:
--
通讯作者:
Zhang Shikun
Zhang Shikun
中科院分区:
工程技术2区
文献类型:
--
作者:
Li Jingbin;Li Gensheng;Huang Zhongwei;Song Xianzhi;He Zhenguo;Zhang Shikun

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水力喷射技术在提高机械钻速和提高采收率方面得到了广泛的应用。(EOR)在油气田中的应用。然而,高的环境压力会大大削弱性能。井底水力喷射,特别是深井(4500m)和超深井(6000m)。因此,人们对环境压力对射流的影响进行了大量的研究。一种通过改变出口阀的直径来产生环境压力的方法被广泛使用。然而,在我们的研究中,证明了该方法不能模拟真实的环境压力。液压喷射环境。在我们的研究中,出口阀是用来维持压力的。压力容器。射流压力和冲击压力随环境压力的不同而不同。距离是可以测量的。射流压力保持不变,直到环境压力超过一个阈值。然后随着环境压力线性增加。阈值大约等于的乘积。喷嘴的压降与喷嘴流量系数的平方。静水压力不是。在压力容器内均匀分布所产生的环境压力。根据伯努利定理。方程中,用这种方法产生环境压力的过程是两者之间的转换过程。静水压力和动压力。假设环境压力均匀分布在。在油井底部,它可能不会对水力喷射产生影响。进行实验来测量。着重介绍了环境压力对井底水力喷射的影响。的。研究结果对水力喷射技术在油气工业中的应用具有一定的指导意义。
Hydraulic jetting techniques are widely used to improve the rate of penetration (ROP) and enhance oil recovery.(EOR) in the oil and gas field. However, a high ambient pressure could significantly weaken the performance of.hydraulic jetting at the bottom of wells, especially in the case of deep ( > 4500 m) and ultra-deep ( > 6000 m).wells. Hence, many excellent studies have been conducted to study the effect of the ambient pressure on a.hydraulic jetting. A method to generate ambient pressure by changing the diameter of the outlet valve is widely.used. However, in our study, it is proved that the method cannot simulate the real ambient pressure.environment for a hydraulic jetting. In our study, an outlet valve is used to maintain the pressure in the.pressure vessel. Jet pressure and impact pressure with different ambient pressures at different standoff.distances are measured. The jet pressure remains unchangeable until the ambient pressure exceeds a threshold.and then increases linearly with the ambient pressure. The threshold is approximately equal to the product of.the pressure drop of the nozzle and the square of the nozzle discharge coefficient. The hydrostatic pressure is not.evenly distributed in the pressure vessel under the generated ambient pressure. According to Bernoulli's.equation, the process to generate ambient pressure by this method is the conversion process between the.hydrostatic pressure and the dynamic pressure. Given that the ambient pressure is evenly distributed at the.bottom of oil wells, it may not have an influence on the hydraulic jetting. Performing an experiment to measure.the effect of the ambient pressure on hydraulic jetting at the bottom of oil wells is strongly recommended. The.results in our study are helpful for the application of hydraulic jetting in oil and gas industry.
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发表时间: 2007
期刊: --
影响因子: --
作者:
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