共查询到18条相似文献,搜索用时 62 毫秒
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针对水平井机械找水存在测试周期长的问题,设计了水平井井下流体取样测试方法。该方法克服定向井取样器电缆传输无法下入水平段的难点,研制出水平井井下电控取样器,首次实现水平井段井下流体取样测试。该取样器在地面设定井下控制程序,下入水平井段后按照预设程序由井下微电机带动滑阀启闭取样腔,在正常生产状态下取得地层流体样品,通过化验分析可得各射孔段流体含水、矿化度、水型等资料。现场应用表明,该技术可一趟管柱完成多段压裂水平井取样,大幅度缩短找水测试周期,具有样品准确、测试简便、效率高等特点,为水平井控水增油措施提供可靠依据。 相似文献
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在油田开发中,储层流体组分的性质划分和空间分布变化是导致预测与实际情况产生显著差异的两个重要因素.为了获取具有广泛代表性的储层流体样品,而非只是代表局部流体性质的样品,认识和掌握地下流体组分的变化情况是非常必要的.作为电缆测试中的一个新概念,井下流体分析(DFA)技术对这种认知的获取具有重要意义.过去DFA技术产生之前,在缺乏试验流体复杂特性证据的情况下,获取充足样品物质进行实验室分析研究存在很大难度.本文证明DFA技术作为"不可或缺的一环"为优化取样程序和实时确定取样位置提供了必要的信息.大量的DFA测点结合若干DFA指导下的流体取样点数据有效地利用了相关流体分析资源.因此DFA技术对于"连续井下流体测试"的推进和发展具有重要的意义.DFA测试时还能够根据流体特性复杂程度的需要实时增加测点而无需增添逻辑指令.另外由于不同层段可能充填不同的流体,所以流体组分的变化情况可用来划分储层.特别是DFA技术可通过流体密度反演来划分储层.这是一项提高产能预测水平的新型技术. 相似文献
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电缆地层测试器(MDT)井下流体分析资料的解释与应用 总被引:1,自引:0,他引:1
电缆地层测试器的井下流体分析模块是MDT最具特色的一个模块,它所提供的成果直观、快捷,可以很好地识别储层流体性质,再结合常规测井资料等信息,可对储层流体性质进行详细地分析和解释,从而解决一些地质难题,帮助地质家进一步认清油藏性质,对地质家作出正确决策提供有力依据。 相似文献
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研制了一种通过作业施工预置式油井分层流体取样技术。使用井下取样器或井下开关器与封隔器、监测压力计组合的取样管柱,在油井正常生产状态下获取2~6个分层段流体样品,通过化验分析了解分层段产液的油水比例、矿化度、离子浓度、黏度、界面张力等信息。该技术还能提供分层段监测压力资料。现场应用表明,该技术可作为产出剖面测试技术的补充,了解某些高含水、有特殊需求的多层合采油井分层生产状况;对三元复合驱等驱油新技术现场试验进行跟踪评价;了解油井分层段生产状况,对驱油新技术应用效果进行评价和验证。 相似文献
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井筒腐蚀监测是进行腐蚀问题研究与防治的必要环节。基于常用腐蚀监测方法和油田现场应用情况,论述了井筒腐蚀监测技术的发展现状。结合现场实际情况,从工艺流程和监测结果评价方法两方面介绍了井下挂环工艺技术,给出了具体的计算方法和评价标准。以多元热流体注入井为例,介绍了井下挂环技术的应用情况,计算了各挂环的平均腐蚀速率和局部腐蚀速率,并对腐蚀情况进行了评价。研究结果表明:内挂环腐蚀速率整体比外挂环大,最大达到1.85 mm/a;内挂环腐蚀严重部位位于管柱的中部和下部,外挂环腐蚀严重部位位于管柱的下部。根据研究结果可对腐蚀严重区域进行重点防治。 相似文献
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MDT取样是在中途测试阶段进行的一种新型井下PVT油气取样方法。通过对准噶尔盆地腹部、南缘8个油气藏的MDT取样获得的储层流体高压物性资料的统计对比,分析总结了MDT取样在识别油气藏类型、判断油气界面、获取可靠的储层油气流体性质方面的作用及意义。同时指出,MDT样品存在钻井泥浆污染问题。 相似文献
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《Petroleum Science and Technology》2013,31(7):789-805
Abstract Oil–water separation is one of the oldest practices in the purification of water or oil. Environmentally concerned organizations pay more attention to the purification of water, while oil companies concentrate on the purification of oil. Water management is particularly an important issue in the production of hydrocarbons, because volumes of water steadily increase as a field ages. In fact, increasing costs of water handling such as separation, disposal, treatment, maintenance, and environmental risks make the oil production scheme uneconomic. Recently, several downhole oil/ water separation technologies have been proposed to reduce water volume in the oil production, but they are not yet technically efficient and cost effective. One of the most recent technologies introduced is membrane separation technology. In the past, polymeric membranes have been used for liquid–liquid separation. These membranes induce high pressure drop and are very expensive. This study identifies a novel material that allows oil to pass through it but not water. After in-depth investigations, a surprising capability of Xerox bond paper having different basis weight (24 lb, 32 lb) was discovered. This material was found to permeate oil selectively from an oil/ water mixture. The recovery of oil was more than 85%, which is high in separation efficiency. The oil permeation flux through the paper surface was measured as a function of various operating parameters. The permeation of oil flux was possible only at finite pressure difference. The recovery of oil was increased with the increase of oil concentration in the feed mixture. The permeation of flux was affected with filtering medium thickness, feed flow rate, and pressure, but these parameters did not affect the ultimate oil recovery. 相似文献
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Downhole Separation of Petroleum Fluids 总被引:2,自引:0,他引:2
Oil-water separation is one of the oldest practices in the purification of water or oil. Environmentally concerned organizations pay more attention to the purification of water, while oil companies concentrate on the purification of oil. Water management is particularly an important issue in the production of hydrocarbons, because volumes of water steadily increase as a field ages. In fact, increasing costs of water handling such as separation, disposal, treatment, maintenance, and environmental risks make the oil production scheme uneconomic. Recently, several downhole oil/ water separation technologies have been proposed to reduce water volume in the oil production, but they are not yet technically efficient and cost effective. One of the most recent technologies introduced is membrane separation technology. In the past, polymeric membranes have been used for liquid-liquid separation. These membranes induce high pressure drop and are very expensive. This study identifies a novel material that allows oil to pass through it but not water. After in-depth investigations, a surprising capability of Xerox bond paper having different basis weight (24 lb, 32 lb) was discovered. This material was found to permeate oil selectively from an oil/ water mixture. The recovery of oil was more than 85%, which is high in separation efficiency. The oil permeation flux through the paper surface was measured as a function of various operating parameters. The permeation of oil flux was possible only at finite pressure difference. The recovery of oil was increased with the increase of oil concentration in the feed mixture. The permeation of flux was affected with filtering medium thickness, feed flow rate, and pressure, but these parameters did not affect the ultimate oil recovery. 相似文献
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缅甸D区块井下复杂原因分析及钻井液技术对策 总被引:3,自引:1,他引:2
在缅甸陆上区块的勘探过程中事故发生率高,多数井都因无法处理而提前完钻或弃井,如Yagyi-1井三开井段的最大井径扩大率为70.95%,Yagyi-1和Patolon-1井分别漏失钻井液3092和387m3。分析认为,造成井下复杂最突出的原因是钻井液安全密度窗口窄,这是因为缅甸D区块断层较发育,高陡推覆体构造多,地层挤压破碎严重,地层倾角大,主断层以上地层中存在长的泥岩段,且有高压油气层存在,在同一祼眼内同时存在渗透性好或含有裂隙和微裂隙的层位,从而导致安全密度窗口很窄。而现用的KCl/PHPA/聚合醇钻井液的抑制性不是很强,封堵能力也无法满足要求,其与地层作用后很大程度地缩小了原来的安全密度窗口。通过比较目前常用体系的抑制性,从扩大安全密度窗口的角度入手,提出可以优选具有强抑制性和封堵能力的KCl/硅酸盐钻井液。 相似文献
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为了在随钻条件下对井下地层流体类型及特性进行原地实时分析,以井下随钻应用为约束条件,提出了井下随钻核磁共振流体分析方法,仿真分析了钻铤尺寸约束下的物理空间,优化了小型核磁共振分析装置设计方案;在此基础上,研发出适于钻铤空间条件的小型核磁共振流体传感器,并制作了全尺寸井下随钻流体核磁共振分析仪短节原型机。井下流体样品的T 2谱试验结果表明,不同流体信号具有明显的响应特征和高信噪比。井下随钻核磁共振流体分析装置为井下流体分析提供了一种新的测试方法,也为核磁共振技术在井下随钻测量中的应用奠定了基础。 相似文献
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井眼压力控制是钻井过程中的关键环节。在常规钻井过程中 ,静态和动态流体压力是用来抑制地层压力并保持井眼稳定的。循环时过高的流体压力能导致破裂压力和孔隙压力之间的操作安全系数降低 ,严重的会丧失循环。为解决上述问题 ,研制出降低当量循环密度 (ECD)的工具。设计该工具的目的是抵抗循环时摩擦压力的影响 ,该工具可应用于以下井况 :孔隙 /破裂压力范围较窄的深水环境、不稳定的井眼、压力衰竭的油气藏及延伸井。该工具能够 :改善井眼稳定性 ;延伸井段长度 ,减少套管用量 ;改进井口控制条件 ;减少循环损失 ;减少差压卡钻 ;提高流速以改善ERD井眼净化条件。 相似文献