The packer is also specially suitable for tests in underbalanced Wells.
该封隔器也特别适宜于负压井测试。
But, underbalanced drilling technology is not suitable for every reservoir.
但是，欠平衡钻井技术并非适用于所有的油气藏。
The advantages of underbalanced pressure drilling and its technical requirements are also discussed.
探讨了负压钻井的优点及技术要求。
Underbalanced drilling shall be conducted in proper Wells where formation conditions are known and suitable.
欠平衡钻井应在地层情况等条件具备的井中进行。
With the particular advantages foam fluid drilling has been the important proportion of underbalanced drilling.
由于其独特的优势，泡沫流体钻井已成为欠平衡钻井系列技术中的重要组成部分。
Finally, it provides the screening process of reservoirs based on the optimizing underbalanced drilling technology.
以优化欠平衡钻井作业为依据，提出了油气藏的筛选步骤。
Underbalanced drilling technology can increase ROP and decrease formation damage, so it is increasingly used worldwide.
欠平衡钻井技术可以降低地层损害、提高机械钻速，所以在世界范围内被逐渐采用。
Wide application of underbalanced drilling techniques has directly or indirectly influenced logging operation to some extent.
目前广泛推广使用的欠平衡钻井工艺的施工方法已对录井作业产生了直接或间接的、不同程度的影响。
For understanding the geologic feature of the reservoir, underbalanced pressure drilling technology is tested in Zhongyuan Oilfield.
为了正确认识油气藏的地质条件，中原油田对负压钻井技术进行了现场试验。
The application of the underbalanced drilling technique in the development of the coal-bed gas should be researched at the same time.
同时，应开展欠平衡钻井技术在煤层气开发中的应用研究工作。
To economically and efficiently develop the gas field, Wells were drilled using underbalanced drilling and slim-hole drilling technology.
根据高效低成本开发苏里格气田的要求，进行了欠平衡及小井眼钻井，为低成本开发苏里格气田做前期技术准备。
Tight sandstone formation has some special geological features, which is extremely easily damaged in the process of underbalanced drilling.
致密砂岩储层具有特殊的地质特征，在钻井过程中极易受到损害。
Air drilling will bring an important play with the improvement of the electromagnetic wave MWD, air motor and other underbalanced drilling equipments.
随着电磁波mwd、空气钻井马达的普及和各种设备的不断完善，空气钻井技术将发挥越来越重要的作用。
The shop tests indicated that all the performance parameters of the valve can meet the design requirements and satisfy the need of whole-course underbalanced drilling.
试验结果表明该阀已达到设计要求，能够满足全过程欠平衡钻井的工艺要求。
When underbalanced drilling or drilling easy leaky zone by using aeration fluid, the determination of fluid density and downhole fluid column pressure is very important.
利用气体型流体进行欠平衡钻井，或钻易漏地层时，流体密度及井下液柱压力的确定十分重要。
The models developed in this paper can be used for the theoretical design of foam underbalanced drilling and workover and for the optimization of the operation parameters.
本文建立的模型可以用于泡沫欠平衡钻井修井理论设计、施工参数优化。
The preliminary practices show that underbalanced pressure drilling is completely fit to high pressure and low permeability as well as low pressure and leakage formations.
初步实践表明，负压钻井技术完全适用于高压低渗地层和低压易漏地层，其效果明显。
The simulation test and field use show that, the new separator has good performance in separating gas from drilling fluid, it can meet the demand of underbalanced drilling.
经模拟试验和现场应用情况表明，研制的液气分离器脱气效果良好，能满足欠平衡钻井需要。
The Alberta Energy and Utilities Board (AEUB) began to extend the concepts noted in the above paper when considering approvals for the underbalanced drilling of critical sour Wells.
当考虑批准对易出问题的含硫井负压钻井时，阿尔伯塔能源与公共事业管理部门(AEUB)开始扩展上面提到的观念。
The stability of viscous foam in dealing with large water invasion and effectively improving solids carrying capacity further promotes the application of underbalanced foam drilling.
粘稠泡沫在对付大量水侵和有效改进岩屑携带能力方面的稳定性，进一步促进了欠平衡泡沫钻井的应用。
Based on the theory of elasticity and molar-Coulomb strength failure criterion, we proposed the prediction method for hole enlargement ratio in the condition of underbalanced drilling.
基于弹性力学理论及岩石摩尔-库仑强度破坏准则，提出了欠平衡钻井条件下井径扩大率的预测方法。
Based on the theory of elasticity and molar-Coulomb strength failure criterion, we proposed the prediction method for hole enlargement ratio in the condition of underbalanced drilling.
基于弹性力学理论及岩石摩尔-库仑强度破坏准则，提出了欠平衡钻井条件下井径扩大率的预测方法。
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