控压固井候凝阶段井口回压控制方法研究与应用  

Research and application of wellhead back pressure control method during the waiting stage of managed pressure cementing

作　　者：纪经 冯颖韬[2] 王有伟 张浩[2] 崔策 黄峰 袁彬[3] JI Jing;FENG Yingtao;WANG Youwei;ZHANG Hao;CUI Ce;HUANG Feng;YUAN Bin(Hainan Operation Company of Oilfield Chemistry Business Department of China Oilfield Services Limited,Zhanjiang Guangdong 524051,China;Oilfield Chemistry Research Institute of China Oilfield Services Limited,Langfang Hebei 065201,China;School of Petroleum and Natural Gas Engineering,Southwest Petroleum University,Chengdu Sichuan 610500,China)

机构地区：[1]中海油田服务股份有限公司油田化学事业部海南作业公司,广东湛江524051 [2]中海油田服务股份有限公司油田化学研究院,河北廊坊065201 [3]西南石油大学石油与天然气工程学院,四川成都610500

出　　处：《石油化工应用》2023年第11期32-35,共4页Petrochemical Industry Application

基　　金：中海油田服务股份有限公司科研项目“深水盐下抗盐防漏固井及应急弃井技术研究”(YHB22YF014)。

摘　　要：控压固井可以降低窄安全压力窗口井固井漏失的风险,同时还能在一定程度上提高顶替效率。但是目前控压固井在候凝期间还是基于经验来施加井口回压,井口回压控制不够精确,容易导致井漏或气窜。为此,根据水泥水化、失水以及胶凝作用建立了井口回压计算模型,并形成了候凝压力控制方法,用于指导井口回压控制。通过与目前的控制方法相比表明该方法能够精确指导井口回压控制,保证井筒安全。Pressure controlled cementing can reduce the risk of cementing leakage in narrow safety pressure windows,while also improving displacement efficiency to a certain extent.However,at present,during the waiting period of pressure control cementing,the application of wellhead back pressure is still based on experience,and the control of wellhead back pressure is not precise enough,which can easily lead to well leakage or gas channeling.To this end,a wellhead back pressure calculation model was established based on cement hydration,water loss and cementation,and a waiting pressure control method was developed to guide wellhead back pressure control.Compared with current control methods,it is shown that this method can accurately guide wellhead back pressure control and ensure wellbore safety.

关 键 词：控压固井 井口回压 水泥浆失重 体积收缩 胶凝悬挂 

分 类 号：TE256.1[石油与天然气工程—油气井工程]