柱塞气举排采工艺在龙凤山气田的首次应用

The First Application of Plunger Gas Lift Drainage Gas Production Technology in Longfengshan Gas Field

贾盈

JIA Ying

中国石油化工股份有限公司东北油气分公司油田开发三年统筹规划项目团队，吉林长春　130062

Three-year Integrated Planning Project Team for Oilfield Development, Northeast Oil & Gas Branch, SINOPEC, Changchun JiLin, 130062, China

龙凤山气田出液气井生产到一定阶段，由于压力、产量降低不能满足携液需求，形成井底积液，部分积液严重井已停产，尝试泡沫排液效果不理想。为了寻求新的更适合的排液工艺，优选北217井作为首口柱塞气举试验井。文中详细阐述了柱塞气举原理，总结归纳了柱塞气举排采工艺的适用条件，并利用适用条件在龙凤山优选出一口积液直井作为试验井。通过应用该工艺前后生产情况对比分析柱塞气举的效果和适用性。北217井应用柱塞气举排采工艺后日增气2 000 m3，同时排液效率提高，减少了井下积液，下步可以在龙凤山气田其他气井试验。同时，井下冻堵影响柱塞下行，采用注醇恢复柱塞气举排采。

Liquid-producing gas wells in Longfengshan Gas Field have reached a certain stage of production. Due to reduced pressure and production, those gas wells cannot meet the demand for liquid-carrying, forming bottom-hole fluid accumulation. What's worse, some wells with severe fluid accumulation have stopped production. The effect of trying foam drainage is not satisfactory. In order to find a new and more suitable drainage technology, Well Bei217 is preferred as the first plunger gas lift test well. The article elaborates the principle of plunger gas lift, summarizes the applicable conditions of the plunger gas lift drainage technology, and uses the applicable conditions to select a vertical well with liquid accumulation as a test well in Longfengshan. By comparing the production situation before and after applying the process, the effect and applicability of the plunger gas lift are analyzed. After the application of this technology in Well Bei217, the daily gas increases by 2000 m3. In the meantime, the efficiency of drainage is improved and the downhole fluid accumulation is reduced. Other gas wells in Longfengshan Gas Field can be tested in future. What's more, the downhole freeze blockage affects the plunger down, and alcohol injection is used to restore the plunger gas lift drainage.

https://doi.org/10.3969/j.issn.1008-2336.2021.02.060