霍沃斯先生将在水力压裂法和其它非传统天然气开采技术中返排和钻出过程中所泄露的甲烷包含在了其计算中。
Mr. Howarth included methane losses associated with flow-back and drill-out processes in hydraulic fracturing and other unconventional gas drilling techniques.
随后是返排，在此期间将泡沫从井中去除。
It is followed by a backflow during which the foam is removed from the well.
在射流冲洗后进行返排，这时酸液从井中排出。
Jet washing is followed by a backflow during which the acid is removed from the well.
现场酸化试验后的返排残酸表面张力可控至对水降低56—67％。
Surface tension of the returned acidizing fluids after field tests can be reduced by 56-67% as compared to that of water.
而目前压裂液返排的研究主要集中在定性分析上，很少有定量的计算。
Flow back of fracturing fluid is currently focus on qualitative analysis, there are few quantitative calculations.
但油井在压裂过程中产生的压裂返排液已成为当前油田水体污染源之一。
However, it produces the fracturing liquid in fracturing, which has become one of the current oil field water pollution sources.
为此，深入研究压裂返排液的处理方法，对油气田环境污染控制具有重要意义。
It is important to research the treatment method of the fracturing to control oil field waste.
在对低渗透凝析气藏采取压裂措施时，压裂后的返排过程影响到液锁对地层的伤害程度。
The speed of flowback during fracturing influences the damage of liquid invading when taking a fracture measure to a low permeability condensate reservoir.
压裂返排液的主要成分是羟丙基胍胶及其它的有机添加剂，具有COD严重超标的污染特征。
Hydroxypropylguar gum and other organic additives are the predominant components of fracturing fluid recovery, which have excessive CODCr, the most important polluting characteristic of the sewage.
对埋藏浅、储层温度低的油气藏进行压裂改造，需要解决压裂液低温破胶、快速返排和伤害问题。
The primal problem in low temperature and shallow gas reservoirs is to overcome the break, the flowing back, and the damage of the fracturing fluids.
小规模多段式注入清洁复合压裂液用于减少支撑剂在近井区域的堆积，从而降低了砂堵和支撑剂返排的风险。
Short sweeps of clean composite fracturing fluids are applied to mitigate proppant buildup in the near-wellbore area, thus reducing the risk of screenouts and proppant flowback.
小规模多段式注入清洁复合压裂液用于减少支撑剂在近井区域的堆积，从而降低了砂堵和支撑剂返排的风险。
Short sweeps of clean composite fracturing fluids are applied to mitigate proppant buildup in the near-wellbore area, thus reducing the risk of screenouts and proppant flowback.
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