元坝水淹井复产“伴水注氮+泡排”工艺研究  

Study on“water injection nitrogen+foam drainage”processfor recovery of Yuanba flooded well

作　　者：黄万书[1] 刘通[1] 袁剑 姚麟昱[1] 倪杰[1] 杜洋[1] HUANG Wanshu;LIU Tong;YUAN Jian;YAO Linyu;NI Jie;DU Yang(Sinopec Southwest China Petroleum Bureau,Deyang,Sichuan,618000,China;Sinopec Southwest China Petroleum Gas Production Plant,Deyang,Sichuan,618000,China)

机构地区：[1]中国石化西南油气分公司工程技术研究院,四川德阳618000 [2]中国石化西南油气分公司采气一厂,四川德阳618000

出　　处：《天然气与石油》2023年第2期80-86,共7页Natural Gas and Oil

基　　金：国家科技重大专项“超深层高含硫气田水平井高产稳产工艺技术研究”(2016ZX05017-005-003);中国石油化工股份有限公司“十条龙”科研攻关项目“超深高含硫气藏控水稳气技术研究”(P18062-4)。

摘　　要：针对元坝气田井深、天然气中H 2S含量高、永久封隔器管柱完成井水淹后复产困难等问题,在排水采气工艺适用条件调研分析的基础上,提出了水淹井复产“伴水注氮+泡排”工艺,并优选了注气压力计算模型,绘制了工艺设计用充满井筒所需氮量与泵压关系及注氮量与氮气柱高度关系速查图版;配套研制了与气田常用缓蚀剂和消泡剂配伍性好的新型高温抗硫泡排剂。YB29-1井、YB121H井现场应用表明,新工艺能有效排空井筒积液,恢复水淹气井生产,在同类高含硫永久封隔器管柱完成井中有推广价值。This study aims to address the issue of ultra-deep well,high H 2S content and the completion of permanent packer string in Yuanba gas field,which leads to difficult recovery of gas wells in Yuanba gas field after flooding.Based on the investigation and analysis on the applicable conditions of conventional drainage gas recovery process,a new combined process of“water injection nitrogen+foam drainage”for the recovery of flooded wells is proposed.Then the calculation model of gas injection pressure is optimized.The quick chart of the relationship between the amount of nitrogen needed to fill the wellbore and the pump pressure and the relationship between the amount of nitrogen injected and the height of nitrogen column for process design is drawn.Furthermore,a new type of high temperature sulfur-resistant foaming agent with good compatibility with corrosion inhibitors and defoamers commonly used in gas fields was developed.The field application of well YB29-1 and well YB121H shows that the new combined process of“water injection nitrogen+foam drainage”can effectively evacuate the wellbore effusion and restore the production of water flooded wells,which can be promoted in the completion wells with high sulfur permanent packer string of the same nature.

关 键 词：元坝气田 水淹井复产 伴水注氮+泡排 工艺设计 高温抗硫泡排剂 

分 类 号：TE377[石油与天然气工程—油气田开发工程]