盐穴储能库固井工艺  

Well Cementing Technology for Salt Cavern Energy Storage

作　　者：刘自茹 肖尧 陈旭 郝华中 凌勇 敖明明 LIU Ziru;XIAO Yao;CHEN Xu;HAO Huazhong;LING Yong;AO Mingming(CNPC Bohai Drilling Engineering Company Limited No.2 Cementing Company,Tianjin,300280;CNPC Bohai Drilling Engineering Company Limited No.1 Drilling Company,Tianjin,300280)

机构地区：[1]渤海钻探工程有限公司第二固井分公司,天津300280 [2]渤海钻探工程有限公司第一钻井分公司,天津300280

出　　处：《钻井液与完井液》2024年第3期374-382,共9页Drilling Fluid & Completion Fluid

基　　金：中油技服项目“新能源产业关键技术研究与应用-空气储能库钻完井技术研究”(2024T-001-004);渤海钻探重大工艺项目“湖北应城压缩空气储能注采井钻井技术研究”(2023ZD40Y-01)。

摘　　要：压缩空气储能技术(CAES)利用压缩空气储能,是一种规模大、灵活、低碳的储能技术。云应储能库注采井普遍具有地层温度低、井眼尺寸大、漏失风险未知、注采周期频繁、井筒长期封隔要求高等固井难点,固井难度大。故开展了湖北应城压缩空气储能固井工艺研究,结合紧密堆积设计理论、晶相结构诱导设计,研发了1套适用于盐穴储能库注采井固井的低温抗盐韧性水泥浆,并形成了相关配套固井工艺。水泥浆密度范围为1.88~1.93 g/cm^(3),稠化时间易调,沉降密度差为0,游离液为0,API失水量不大于50 mL,抗盐达半饱和,7 d弹性模量小于6.13 GPa,低温30℃下起强度时间小于10 h,24 h抗压强度大于14 MPa。该项技术成功应用于湖北云应盆地压缩空气储能项目注采井表层套管及生产套管固井,固井质量合格率为100%,优质率大于95%,同时对盐穴储能库固井提供技术支持和借鉴。Compressed air energy storage(CAES)technology is a large-scale,flexible and low carbon energy storage technology that utilizes compressed air for energy storage.All injectors and producers in the Yunying energy storage are faced with well cementing difficulties such as low formation temperature,large hole diameter,potential losses of cement slurry during well cementing,frequent alternation between injection and production,as well as strict requirements for long-term isolation of the wellbore etc.To solve these difficulties,well cementing techniques suitable for the CASE wells drilled in Yingcheng,Hubei Province are studied.A low-temperature salt-resistant tough cement slurry suitable for cementing the injectors and the producers drilled for the salt cavern energy storage is developed based on the close packing design theory and the induction of crystal phase structure design method.A set of well cementing technique based on this new cement slurry is developed.The density of the cement slurry can be adjusted between 1.88 g/cm3 and 1.93 g/cm^(3).The thickening time of the cement slurry is easy to be changed to meet the operation requirements.The cement slurry has no density difference between the top and the bottom,zero free water and API filter loss of less than or equal to 50 mL.Contamination by salt to semi-saturation is of no influence to the performance of the cement slurry.The 7 d elastic modulus is less than 6.13 GPa.At temperatures lower than 30℃,the strength of the cement slurry can develop in less than 10 h.The 24 h compressive strength of the set cement is greater than 14 MPa.This cement slurry and the well cementing techniques have been used in the cementing of the surface casing and the production casing of the injectors and the producers drilled for the CAES in the Yunying basin in Hubei.The cementing job is 100%qualified and 95%of which is excellent.

关 键 词：压缩空气储能 盐穴 储能库 水泥浆 抗盐 早强 韧性 固井 

分 类 号：TE256[石油与天然气工程—油气井工程]