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《化学工业与工程技术》2018,(1):51-56
渤海X油田即将进入高含水阶段开发,由于其措施增油效果不明显,综合调整的难度加大,因此准确把握高含水期油田的开发趋势,分析油田自然递减和含水上升率变化趋势,对油田开发工作的正确运行有着至关重要的作用。通过对渤海X油田的含水上升规律与产量递减规律的研究,发现理论的含水上升率总体呈先上升后下降的趋势,且初期变化最高,在含水为35%时达到最大值。在定液量生产下,产量达到高峰值时递减率为零;递减开始时递减率呈先上升后下降的趋势,结合分析该油田实际生产资料,分析得出该油田自然递减率控制良好,仍有下降空间。在中低含水阶段(fw<60%)无因次采油指数下降趋势较平缓,是油田稳产有利时机,含水率在fw为80%时出现一个明显增大的拐点,无因次采液指数会出现急剧上升的现象,因此在fw>80%后可进行后期大幅度提液。 相似文献
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大庆外围油田为提液上产,主要采用抽油机井调大冲次等方式,通过统计分析,单井产液量与冲次不总是正比关系,且高冲次单井检泵周期会随之缩短、耗电量增加,使得单井生产成本增加。为改善单井运行工况,提高泵效,降低能耗,开展了长冲程、低冲次现场综合调整试验。本文重点阐述与探讨了葡萄花油田应用长冲程、低冲次参数原理及优化原则,介绍了现场试验情况,并进行了效果效益分析,可进一步优化葡萄花油田机采井井下工况。 相似文献
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单井采出液量是油田开发的基础数据,是开发方案设计、地面工程建设的重要依据。随着油田滚动开发,油井计量的难度越来越大,加之生产的精细分析及降本增效的需要,对单井计量技术的要求也在提高,传统计量方式已不能满足油田生产过程中各单井产液量、产气量变化大和难以在较宽的计量范围内实现精确计量要求的现状。本文从九厂油井计量现状出发,对目前的单井计量技术进行了对比分析,为近远期单井计量技术的探索应用提供了一条思路。 相似文献
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高庆西部低渗透油田,由于渗透率低、油层多而薄,产量低,油井见水后,产量不升反而下降,造成抽油机井载荷利用率下降,能耗增加的不利局面。本文从相渗曲线入手,分析了采液量下降原因,并利用相渗曲线、无因次采液(油)指数与含水关系曲线,计算了油井初期产能的预测方法,并给出了最高采液指数的计算方法。 相似文献
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低渗透油田油井见水后,采液(油)指数下降,给油田稳产造成很大影响。同时,由于初期建设时选择抽油机均留有较大提液稳产的载荷余地,致使载荷利用率低,能耗增加。为了达到降本增效的目的,必须研究其产液变化规律,为抽油机选型提供依据。本文通过根据相渗曲线对油井产液变化规律进行了研究和预测。 相似文献
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延长油田属于低渗透油田,修井过程中工作液侵入是造成油田储层伤害的主要因素之一.为了降低外来工作液对储层的伤害,缩短修井产量恢复时间,研制了有利于保护储层的修井液.通过微波法对黄原胶XG改性得到的XG-GM作为增粘剂.对该增粘剂性能进行评价,并对降滤失剂、粘土防膨剂、表面活性剂、缓蚀剂等进行优选并组合复配.确定的修井液:清水+0.4%XG +2%RS +0.3%AY +0.3%MOA-E +0.2%S-HSJ +JZ-2.实验表明,该修井液具有良好的增粘流变性,API滤失量控制在10.5 mL,岩屑回收率为95.3%,低界面张力.动态伤害模拟实验表明,该修井液体系对岩心的恢复率为84.6%~92.4%.在延长油田应用结果表明,该修井液体系能有效地保护油气层,提高单井产量,应用前景良好. 相似文献
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B166井区为白豹油田主力开发区块之一,早期井区南部开展强注强采开发试验,导致油井含水上升速度快、采油速度低、递减快。笔者总结南部开发试验经验,参阅大量注水开发技术文献,并借鉴国内外油田注水开发实例,在超低渗油藏已成熟的超前注水技术基础之上,创新性的提出了温和注水技术。北部试验井组采用超前温和注水开发技术,取得良好的开发效果,平均单井日产油为强注强采井2倍左右,表明了超前温和注水技术适用于B166井区注水开发,该技术在国内外同类型油藏注水开发实践中具有较大的应用价值。 相似文献
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肇261西块葡萄花油层单井层数少(平均为3个),产量接替能力差,主力油层水淹后,油井产油量下降、含水上升速度较快,进一步控制含水上升速度提高采出程度难度大。因此在肇261区块开展了水井整体调剖控水试验研究,一定程度上控制了区块产量递减,有效改善了区块开发效果。 相似文献
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In the present work, the impeller in the conventional gas‐liquid mixed vessels was replaced by a fluid jet as the mixer. Using an experimental setup, the effect of several parameters on the mixing time as a measure of the liquid‐phase mixing intensity, which is one of the required transport characteristics for designing gas‐liquid mixed systems, was studied. The results show that gas injection decreases the mixing time in comparison with the ungassed condition, but the mixing time is not necessarily decreased by increasing the gassing rate. On the basis of the amount of the jet Reynolds number and gassing rate, and thus the created circulation pattern, the mixing time may be decreased or increased. Also, the location of the probe for cases in which there are more dead zones in the vessel have a considerable effect on the measured mixing time. With increasing uniformity of the velocity domain, the influence of the probe location was reduced. Also, by increasing the jet flow rate and decreasing the nozzle diameter, the length of the jet, the amount of entrained bulk fluid, and the intensity of recirculation flow increased, and thus the mixing time decreased. 相似文献
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The tribological properties of a complex branched-hydrocarbon oil under shear in a gap between smooth iron atom surfaces were studied by large-scale molecular dynamics (MD) simulation. The liquid was a nonpolar lubricant, i.e. a polyalphaolefin (PAO) oil mixture of 1-decane dimer, trimer, and tetramer molecules. The rheological characteristics of the lubricant, including the shear stress and viscosity as well as the relaxation time of the liquid molecule, were calculated. The results show that, as the number of branches of the liquid molecule increases, the shear stresses and the wall slip increase. However, for a mixture fluid containing three different branched molecules, the wall slip decreases in comparison to a liquid consisting of only one kind of branched molecule. 相似文献
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The study of the loading/complete dispersion transition is of great importance especially in processes with enhanced mixing requirements. In the present work, new data and correlations concerning the dispersion characteristics in gas‐liquid contactors agitated by single and dual Rushton turbine systems are reported. The maximum amount of gas which can be completely dispersed, in the presence of gross, well defined recirculation patterns of gas at a given stirrer speed is predicted. Under these conditions, an increase of flow number with increasing Froude number could always be estimated. With decreasing impeller diameter, d, the same gas amount could be dispersed at higher stirrer speeds. At impeller spacing ΔH = 2 d, for d equal to 0.06 and 0.08 m, and ΔH = 1.54 d, for d = 0.10 m, the complete dispersion conditions of the dual impeller systems were slightly better than the corresponding conditions of the single impeller systems. 相似文献
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新型的纤维-液膜油水分离器 总被引:1,自引:0,他引:1
介绍一种新型的纤维 液膜油水分离设备 ,主要由聚结罐和分离罐组成 ,采用改性强亲油性纤维作为聚结罐内件 ,使含油污水中的细小油滴通过强亲油性纤维在较短的时间内合并为大油滴成为可能 ,缩短分离罐沉降时间 ,提高油水分离效率。试验表明 ,新型的纤维 液膜油水分离设备用于处理含油污水是行之有效的 ,用于处理稀油污水比稠油污水效果更好 相似文献