液体起泡剂排水采气工艺技术的研究与应用

液体起泡剂排水采气工艺技术可降低井底回压，提高气流携水能力，从而达到增加天然气产量的目的，从原理性能上优于常规投棒排水技术。文章通过对辽河油田兴隆台采油厂气井生产现状的分析，提出采用液体起泡剂排水采气工艺技术，对该技术的选井原则、液体起泡剂筛选等进行了详细阐述，经过现场应用取得了显著增产效果，累计施工12口井，增产天然气456.8×１０^４ｍ^３，证明该工艺技术施工工艺简单，不需关井，作用时间长，提高了气井排水能力，具有投资少、见效快、增产显著的特点。同时在技术实施过程中，通过对现场应用试验进行反复摸索、研究，根据不同措施气井的日产水量的多少，初步总结出一套较为有效的气井套管加药规律,在现场应用中取得了良好的效果。

STUDY AND APPLICATION OF TECHNIQUES OF “GAS RECOVERY BY WATER DRAINAGE” WITH LIQUID FOAMER 1)

Techniques of “gas recovery by water drainage” with liquid foamer can decrease the bottom hole pressure, improve the water carrying ability of gas flow, and increase the gas production. It should be better than the convenient techniques of “gas recovery by water drainage” with bar dropping according to the principle. With the current status analysis of gas well production in Xinlongtai Oil Recovery Factory of Liaohe Oilfield, the techniques of “gas recovery by water drainage” with liquid foamer are suggested. The principle to select wells for the techniques application and the method to choice foamers are explained in detail. With field application, obvious results of production increase are achieved. The techniques are used for 12 wells totally and 4.568×106 m3 of gas production has been increased cumulatively. The techniques are simple, no need to shut in, have long effective time, improve water draining ability of gas wells, and have the characteristics of fewer investment, rapid achievement appearance and obvious production increase.