期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：186
期号：4
页码：012050
DOI：10.1088/1755-1315/186/4/012050
语种：English
出版社：IOP Publishing
摘要：The Su 75 block is a typical low-permeability, low-pressure and low-abundance gas field, 89.6 percent of the gas wells are water-bearing, so it makes the drainage gas recovery become vital means for sustainable development. Recently, the main drainage gas recoveries are the foam drainage gas recovery, plunger drainage gas recovery, compressor/nitrogen gas lift and so on. These measures do not work in all water-bearing gas wells, especially for horizontal wells of big-size production string and gas wells of low entrainment capability. Based on the characteristics of drainage gas recovery and the applicable condition analysis, drainage gas recovery technology of downhole small diameter tubing of the horizontal wells without well killing is put forward. The feasibility was analyzed theoretically, and field experiment was carried out with remarkable effect.
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