东海海上气井气举排液采气工艺实践与认识
Practice and Understanding of Gas Lift and Liquid Drainage Gas Recovery Technology in Offshore Gas Wells in the East China Sea

在东海海上气井受边底水、凝析油等影响，在生产过程中表现为井底压力下降、井筒积液加剧，气井产能降低。为实现气井中后期排液采气，东海海上先后开展了油管打孔气举工艺、不动管柱跨隔式打孔气举工艺、多级气举阀气举工艺管柱和连续油管气举工艺管柱试验与应用，累计应用20余口井，提升气井诱喷投产和积液停产排液复产的成功率。为保障海上气井低压低产阶段有效实现排液采气，可进一步开展平台多井循环气举工艺、气体射流泵负压气举工艺、复合气举工艺及气举智能化管理提升，满足越来越多的低压气井排水采气需求。
Offshore gas wells in the East China Sea are affected by edge and bottom water, condensate oil, etc. During the production process, the bottom hole pressure decreases, the wellbore liquid accumulation intensifies, and the gas well productivity decreases. In order to achieve gas recovery by liquid drainage in the middle and late stages of gas wells, the East China Sea has successively developed oil pipe drilling gas lift technology, fixed pipe string span-type drilling gas lift technology, multi-stage gas lift valve gas lift technology pipe string and coiled tubing gas lift. The test and application of process strings have been applied in more than 20 wells, improving the success rate of gas well induced blowout and production shutdown and liquid accumulation, draining and resuming production. In order to effectively achieve liquid drainage and gas production in the low-pressure and low-production stage of chartered offshore gas wells, platform multi-well circulation gas lift technology, gas jet pump negative pressure gas lift technology, composite gas lift technology and gas lift intelligent management improvements can be further carried out to meet the needs of more and more people. There is a large demand for drainage and gas production from low-pressure gas wells.