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本文在扼要介绍低压钻井概念的同时,介绍用空气、雾化、充气泥浆和泡沫流体等作为循环介质的低压钻井技术。比较详细地介绍了各种循环介质的适用范围、技术特点及实施要领等,接着列举了国外应用成功的8个实例,说明为对付不同的低压地层而采用不同的低压钻井方式结果是有效的。为防止钻井、完井过程中对低压油层的损害,不“枪毙”油层,扩大国内找油领域,低压钻井技术必将得到广泛地应用。
This paper briefly introduces the concept of low-pressure drilling at the same time, introduces the use of air, atomized, inflatable slurry and foam fluid as a circulating medium low-pressure drilling technology. The application range, technical characteristics and implementation essentials of various kinds of circulating media are introduced in detail. Then, eight examples of successful application in foreign countries are listed, which shows that it is effective to adopt different low pressure drilling methods to deal with different low pressure strata. In order to prevent the damage to the low-pressure oil layer during drilling and completion and not to “shoot” the oil layer and expand the field of looking for oil in the country, the low-pressure drilling technology is bound to be widely applied.