摘要
随着我国油气资源勘探开发不断向深层挺进,深井、超深井面临着越来越高的温度、压力挑战。为了满足深层、超深层油气开发的需要,针对现有固井缓凝剂抗高温能力差(低于220℃)无法满足大于240℃超高温固井需求的技术难题,根据油井水泥水化产物吸附特点,通过优化分子结构设计,引入强吸附阳离子单体(CP-22)、不饱和羧酸等耐高温单体,制备出了一种新型四元超高温两性离子缓凝剂(HTRP),并通过红外光谱、高温高压稠化等方法对缓凝剂HTRP的分子结构和耐超高温性能进行了研究。研究结果表明:(1) HTRP耐超高温性能优异,在240℃超高温循环温度下水泥浆稠化时间达401 min,可有效延长油井水泥在超高温下的稠化时间;(2)在150~240℃对油井水泥浆调凝性能优异,对温度、加量不敏感,稠化时间线性可调,有利于深井、超深井水泥浆的安全泵送;(3)与其他固井水泥外加剂、不同地区产油井G级水泥配伍性好,对水泥石力学性能影响小,顶部强度发展迅速,可满足超高温井固井施工需求。结论认为,该缓凝剂有效地解决了超深井超高温缓凝剂的高温失效难题,为超高温聚合物类缓凝剂的分子结构设计及耐超高温性能提升提供了新思路,可为我国深层、超深层高温高压油气藏的勘探开发提供技术支持,具备良好的应用前景。
As domestic oil and gas exploration and development continuously steps into deep layers,deep and ultra-deep wells face the challenges of higher and higher temperature and pressure.In order to meet the needs of deep and ultra-deep oil and gas development and deal with the technological problem that the existing cementing retarder is poor in high temperature resistance(≤220℃)and cannot meet the need of ultra-high temperature cementing under 240℃,this paper prepares a new type of quaternary ultra-high temperature zwitterionic retarder(HTRP)by optimizing the molecular structure design and introducing strongly adsorbing cationic monomer(CP-22),unsaturated carboxylic acid and other high temperature monomers,according to the adsorption characteristics of the hydration product of oil well cement.In addition,the molecular structure and ultra-high temperature resistance of retarder HTRP are studied by means of infrared spectroscopy and high-temperature and high-pressure thickening method.And the following research results are obtained.First,HTRP has excellent ultra-high temperature resistance,and the thickening time of cement slurry can reach 401 min under circulating ultra-high temperature of 240℃,indicating that it can effectively prolong the thickening time of oil well cement under ultra-high temperature.Second,at 150-240℃,it performs well in adjusting the thickening time of oil well cement,it is not sensitive to temperature and dosage,and the thickening time is linearly adjustable,which is favorable for the safe pumping of cement slurry in deep and ultra-deep wells.Third,it is well compatible with other cementing additives and grade G cement of oil production wells in different areas and has little effect on mechanical performance of set cement,and the strength at the top develops rapidly,so as to meet the requirements of cementing construction of ultra-high temperature wells.In conclusion,this retarder effectively solves the failure problem of retarder under ultra-high temperature in ultra-deep wells,which p
作者
于永金
薛毓铖
夏修建
王成文
刘慧婷
孟仁洲
陈泽华
刘伯诺
YU Yongjin;XUE Yucheng;XIA Xiujian;WANG Chengwen;LIU Huiting;MENG Renzhou;CHEN Zehua;LIU Bonuo(CNPC Engineering Technology R&D Company limited,Beijing 102206,China;School of Petroleum Engineering,China University of Petroleum<East China>,Qingdao,Shandong 266580,China;Key Laboratory of Unconventional Oil&Gas Development of Ministry of Education//China University of Petroleum<East China>,Qingdao,Shandong 266580,China;Shandong Key Laboratory of Oilfield Chemistry//China University of Petroleum<East China>,Qingdao,Shandong 266580,China)
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2023年第3期107-112,共6页
Natural Gas Industry
基金
国家自然科学基金基础科学中心项目“超深特深层油气钻采流动调控”(编号:52288101)
国家自然科学基金“自组装/纳米SiO_(2)热增黏聚合物及其调控超深井高密度水泥浆恒匀机理研究”(编号:52074329)
中国石油集团关键核心技术攻关项目“抗温240℃以上的环保井筒工作液新材料”(编号:2020A-3913)。
关键词
超深层
超高温
缓凝剂
固井
水泥浆
稠化时间
油井水泥
性能评价
Ultra-deep
Ultra-high temperature
Retarder
Cementing
Cement slurry
Thickening time
Oil well cement
Performance evaluation
