保障水平井固井质量综合技术初探

水平井的特殊性使其在固井工程环节存在套管下入困难、套管居中程度低、易发生窜槽、水泥胶结质量差等共性问题。固井质量直接影响水泥环完整程度和油气井密封性能，在当前普遍强调保障油气井全生命周期工程质量的环境下，如何确保水平井固井质量变得越发紧迫。针对水平井固井主要技术难点，提出针对性技术手段，综合运用漂浮下套管工艺、冲洗隔离一体化高效前置液技术、零游离液微膨胀水泥浆技术、无固相顶替液技术进行了现场固井实践，取得了较好效果。     

煤层底板加固多分支水平注浆井套损探讨及预防措施研究

地面多分支水平井注浆技术作为煤矿区域水害治理关键技术之一,多分支水平注浆井采用三开井身结构。针对于二开套管损坏变形为研究对象,进行了钻进与注浆过程可能造成套管损环变形机理因素分析:套管磨损、注浆扰动、固井质量效果等方面。基于因素机理分析分别从套管磨损预防、套管剪切损坏预防、固井质量效果差预防等方面细化,深入研究了预防二开套管损坏变形措施。     

TK123H水平井复合套管固井技术

TK123H水平井复合套管固井下套管易遇阻、遇卡、顶替效率低、易窜槽和固井工具性能要求高等难点,利用Schlumberger CemCADE固井软件通过分析模拟,研究和优化固井液体系,合理加放扶正器,同时利用套管"抬头技术"和紊流-塞流复合顶替模式以及配套技术。全井段固井质量声幅在10~40%,目的层段声幅小于15%,固井质量达到优质。     

四川JF区块非常规气层固井技术

为解决四川JF区块非常规气层的固井难题,在分析固井难点的基础上,通过隔离液、水泥浆、扶正器、施工参数、套管试压等固井设计和水马力的设备配置、高压管汇、套管试压、延缓环空试压等固井工艺措施,固井质量得到保证,形成了一套防气窜超高压固井技术。同时提出提高浮箍的可靠性和增加一个固井浮箍和减少套管试压值的建议,固井施工前降低钻井液密度的措施在其他地区固井施工中提供了有益参考。     

文75X1井长裸眼长封固段小间隙小尾管固井实践

小井眼开窗侧钻技术很好地解决了油水井无法继续进行生产的问题,起到"死井复活"、提高采收率、降低成本的目的。文75X1井是部署在文安斜坡史各庄构造带文75断块上位置的一口小井眼开窗侧钻井,完钻井深3376m,井斜34.64°,裸眼段长达1164 m,下入95.3 mm小尾管固井,存在环空间隙小、封固段长、套管居中度难以保证以及套管安全下入井底难度大等一系列难题,通过采取有效通井措施、扶正器安放提高套管居中度、弹性低密度高强度水泥浆体系技术等固井工艺技术,经质量检测,固井合格率100%,优质率高达92%,为类似的长裸眼长封固段小间隙井小尾管固井质量的技术措施提供参考。     

塔河油田水平井固井技术应用

提高水平井固井质量以适应油田进一步勘探开发的要求是钻井工程研究的一项重要课题,塔河油田水平井完井方式多是177.8mm+139.7mm复合尾管固井,固井质量优良率在85%以上。首先分析了水平井固井的技术难点,进而从水泥浆的体系、套管的安全下入、附件的优选、现场施工技术等方面进行分析,总结出一套适合塔河油田水平井固井相对应的水泥浆性能及固井施工工艺。     

长水平段水平井固井技术难点与对策分析

随着油气勘探开发技术的不断发展,水平井应用越来越普遍,在薄层油气藏、稠油油藏、低孔低渗油气藏、非常规油气藏勘探与开发中具有明显的技术优势,取得了较好的应用效果。针对长水平段水平井固井中存在的难题,通过使用水平井固井特殊工具,结合套管下入技术、套管居中技术、固井前置液技术、优化水泥浆性能等技术措施,能够有效提升长水平段水平井固井质量,对固井施工具有一定指导意义。     

致密油水平井固井技术现状

分析了影响水平井固井质量的主要因素及国内外的技术措施,包括井眼准备、套管下入与居中、浆柱结构优化与注替工艺优化等环节,总结了目前水平井固井技术最新进展及发展方向,通过对国内外针对提高水平井固井质量的针对性技术措施及研发、应用的新工具、完井液体系的总结,可为致密油水平井固井提供借鉴和参考。     

提高煤层气水平井固井质量技术措施

乌鲁木齐矿区大倾角中低煤阶煤层气井普遍采用套管固井射孔完井方式。本文在分析影响大斜度井、L型井固井质量的因素的基础上,主要从调整钻井液性能、提高套管居中度、优化隔离液与冲洗液、水泥浆体系配方优选等四个方面采取措施,来提高水平井固井质量。     

塔河油田小井眼小尾管固井技术

塔河油田奥陶系小尾管固井存在高温、易漏、套管居中困难等一系列难题.本文结合TK1080井及AD24井的施工,详细介绍了该类型复杂井的固井工艺及其应用效果,为进一步开发提高和确保塔河深井小尾管固井质量的技术措施提供参考.     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.