但是，欠平衡钻井技术并非适用于所有的油气藏。
But, underbalanced drilling technology is not suitable for every reservoir.
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。
The application of the underbalanced drilling technique in the development of the coal-bed gas should be researched at the same time.
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。
Underbalanced drilling technology can increase ROP and decrease formation damage, so it is increasingly used worldwide.
研究和现场试验表明，采用欠平衡钻井技术，尤其是气体钻井技术是钻井提速增效的有效途径。
It is showed by field and experimental that the underbanlanced drilling(UBD) and special gas drilling is the effective way to improve ROP and efficiency.
井底负压值控制是欠平衡钻井技术的基础，而井底负压值的大小与环空多相流的有关压力计算有关。
The under-balanced drilling technology is based on how to control the bottom negative pressure which is related to the pressure computation of multiphase flow in annulus .
王平1井是江汉油田的第一口中曲率水平井，储层岩性为盐间非砂岩层，水平井段采用欠平衡钻井技术。
Well WP-1 is the first medium radius horizontal well drilled in Jianghan oilfield, and its horizontal interval is drilled using under-balanced technology.
空气钻井技术是以空气作为循环介质的欠平衡钻井技术，其钻头的破岩形式与常规泥浆钻井有很大的区别。
Air drilling is a kind of under-balanced drilling technology with air, whose rock breaking form is different from conventional mud drilling.
该井四开钻探过程中成功地采用欠平衡钻井技术钻穿寒武系凤阳山组，以防止该区古生界灰岩储层发生井漏及储层污染，从而保护油层。
Using under balance pressure drilling technique aims at preventing the mud loss and pollution of Palaeozoic limestone reservoir in this area and therefore protecting oil reservoir.
国内欠平衡钻井普遍实施，要用到的旋转防喷器是关键设备，技术含量高。
While underbalance drilling spreads greatly, rotating blowout preventer, as a kind of high technical product, is the crucial equipment to control well pressure.
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。
With the particular advantages foam fluid drilling has been the important proportion of underbalanced drilling.
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。
To economically and efficiently develop the gas field, Wells were drilled using underbalanced drilling and slim-hole drilling technology.
欠平衡钻井和欠平衡测井技术对于直接发现和保护油气层、提高单井产能和勘探开发成功率具有非常重要的意义。
Under-balanced drilling and under-balanced logging are very important techniques for directly identifying and protecting hydrocarbon reservoirs and enhancing productivity.
空气钻井是目前钻速最快、最经济的欠平衡钻井作业方式之一，是低压低渗漏特别是恶性井漏钻井最实用的技术。
Air drilling is one of the fastest and cheapest drilling methods up to now. It is the most practical technology to penetrate the low - pressure and low -permeability reservoirs and leak - off zones.
利用泡沫流体进行欠平衡钻井，是一种较安全的钻井技术。
利用泡沫流体进行欠平衡钻井，是一种较安全的钻井技术。
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