固体泡沫剂排水采气适应性分析及优化措施  

Adaptability analysis on solid foam drainage gas recovery and optimization measures

作　　者：陈依 张凤琼 韦元亮 刘阳[2] 胡波儿 Chen Yi;Zhang Fengqiong;Wei Yuanliang;Liu Yang;Hu Boer(Chongqing Gas District,PetroChina Southwest Oil&Gasfield Company,Chongqing 400021,China;Gas Transmission Management Division,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan 610051,China)

机构地区：[1]中国石油西南油气田分公司重庆气矿,400700 [2]中国石油西南油气田分公司输气管理处

出　　处：《天然气勘探与开发》2019年第3期116-121,共6页Natural Gas Exploration and Development

摘　　要：四川盆地川东气田逐步进入开发中后期,多采用泡沫排水采气工艺辅助气井带液生产,包括固体及液体两种加注方式。其中在固体泡排工艺应用过程中发现:一是周期性关井加注存在气井无法长期稳定生产、气量未最大化发挥的弊端;二是棒状固体起泡剂不易通过大斜度井、水平井的造斜段,造成工艺受限。为解决以上问题,优化固体泡排加注以适应不同生产井况的需求,通过固体泡排剂质量计算、造斜段极限长度几何核算及现场应用实例,得出:①实际应用时根据气井参数计算固体起泡剂所受曳力,进而计算固体起泡剂的质量,可实现不关井加注;②现有棒状固体起泡剂长度均能满足川东地区大斜度井、水平井的投注要求;③水平井YH004-H2井投注固体棒状泡排剂试验,辅助带液效果明显。As Chuandong gasfield entering into middle to late development stage,some technologies of foam drainage gas recovery, including solid and liquid injection modes,are often adopted to assist the liquid-carrying production for gas wells.However,in an application of solid foam drainage technology,the periodic shut-in for injection cannot guarantee long-term stable production and maximize production utilization;on the other hand,rod-like solid foam agent cannot flow through highly deviated wells or horizontal- well kick-off section.So,it’s necessary to optimize its injection mode to meet the demands of different production well conditions. In this study,the mass of solid foam drainage agent was calculated,the ultimate length of kick-off section was geometrically checked, and some field application was carried out.Results show that (1) the drag force applied to solid foam agent is calculated based on well parameters,and then its mass is also calculated.In this way,non-shut-in injection can be realized;(2) from the perspective of length, existing rod-like solid foam agents can all satisfy injection requirements of highly deviated and horizontal wells in eastern Sichuan Basin;and (3) many injection tests of rod-like foam drainage agent for YH004-H2 horizontal well present remarkable assisting effect on carrying liquid.

关 键 词：低产气井 泡排剂 排水采气 优化措施 

分 类 号：TE377[石油与天然气工程—油气田开发工程]