关键词: 零散气, 回收利用, 橇装化, 快速搬迁

Abstract: The scattered wellhead gas has the characteristics of many sites, scattered well field distribution, and wide distribution area. In the process of oil and gas field production, because of small volume of the wellhead gas, fast decay of the output, the investment of pipeline transportation is too high, and the economic efficiency is low. Most of this kind of gas are directly discharged or burnt on site, wasting precious resources and polluting the environment. Aiming at the characteristics of the wellhead, a set of modular and skid-mounted movable units was developed to purify the natural gas from the wellhead and, combining the throttle expansion refrigeration with the refrigerant refrigeration, to separate the mixed hydrocarbons and recover the C3, C4, C5+ . They can be processed into qualified natural gas, as a commercial gas being pressurized and put into the downstream pipeline or CNG tanker to be transported to other places. The mixed hydrocarbons after stabilization can be transported to other places by pressure tank cars, further being processed into liquefied petroleum gas and/ or stable light hydrocarbons, so as to realize the economic, social, and environmental benefits of the scattered wellhead gas resources in oil and gas fields.