共查询到20条相似文献,搜索用时 46 毫秒
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我国已探明天然气储层大多属于中低渗透储层,这些储层非均质明显,孔隙度低,连通性差,自然产能低。为了高效开采气藏,必须结合储层的物性特征,优选井网形式和采气速率,制定合理的开发方案。本文主要通过数值模拟运算,研究井网形式、采气管径、采气速率等开发因素对S26区块气藏开采效果的影响,从而优选出合理的开采方案。 相似文献
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文章以夏子街油气田为例,研究了多断块气顶气藏和气层气藏的成因、分类、开采政策和开采原则。夏子街气藏断块复杂、初期纵横向气窜严重、从1991年开发到现在压力下降幅度大为50%,目前已进入开采末期,低产停产井多。应用气藏精细构造对比解释技术,在断层附近局部构造高点新增了4个小气顶。通过气藏精细分类,气藏开发规律研究,确定了各气顶的开采原则、合理产量及采气速度。 相似文献
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升平气田储集层为中孔低渗火山岩,由于火山岩的特殊性,目前国内外关于火山岩气藏井网井距研究较少,因此如何合理确定火山岩气藏井网井距对于气田开发具有重要意义。本文运用了经济极限方法、试井法、定单井产能法、合理采气速度法、丰度计算法、合理井网密度法等六种方法计算了其极限井距和技术合理井距,最后通过数值模拟法综合确定了适合升平气田营城组火山岩气藏合理井距。研究认为:只要技术合理,井距不低于其经济极限井距都是可行的。最终推荐营城组火山岩采用1200m井距进行气藏开发。 相似文献
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排水采气是水驱气田生产中常见的采气工艺。随着气藏开发的条件越来越苛刻,对起泡剂性能要求越来越高,现有起泡剂只能在温度和盐度均不太高的条件下适用,不能满足高温高盐气藏开采的需要。该文在烯丙基单体上引入含有磺酸基的亲水性单体,达到耐温抗盐的目的。用聚合反应合成了耐温抗盐排水采气用起泡剂AMS-18。用搅拌法、气流法、倾注法评价了其性能。结果表明,该起泡剂能够耐温120℃,抗盐250 000 mg/L〔其中ρ(Ca2+)=4 000 mg/L〕,在该条件下,半衰期100 s,泡高84.8 cm,消泡速度6.15 cm/L。AMS-18于2005年放大至3 m3反应釜进行工业化生产,并在SU气田进行了矿场应用,措施井油压上升了1.5 MPa,产气量由原来的2 800 m3/d上升到目前的18 000 m3/d,增加了7.2倍。 相似文献
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以凝析气藏投产井ZG43-9井作为研究对象,在定容衰竭过程中使用不同的放气速度,使得其采气速度不同,从而研究不同采气速度对凝析气井的高压物性参数的影响。实验结果表明,采气速度对天然气的采收率影响较小,但对凝析油的采收率影响较明显,采气速度越大,凝析油的采收率越高。 相似文献
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A pump suitable for use with gas electrodes, in which recirculation of the gas is necessary, is described. The system to which the cell with the gas electrode and the pump are connected does not change its volume when the pump is in operation. The pump works as follows: an embolus, consisting of a Tefloncoated magnetic stirring bar, placed inside a glass tube having an internal diameter slightly larger than the diameter of the bar, is moved from the outside with a permanent magnet, which in turn is moved horizontally along the tube by means of a mechanical assembly driven by an electric motor. The motion of the embolus is accompanied by the closing and opening of glass valves which allow the gas to circulate in the desired direction. The pump, used in conjunction with a vacuum line, operates from pressures as low as 60 Torr to above atmospheric pressure. The operation of the pump is unaffected by organic gases and most inorganic gases. 相似文献
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气辅成型中气道设计对气体穿透的影响 总被引:1,自引:0,他引:1
气道的设计是气体辅助注射成型中的一个重要因素,不同的气道对气体穿透会产生不同的效果。利用模塑软件Moldflow分析了不同尺寸的矩形截面气道的气体穿透情况。结果表明,当量直径太小的气道,气体容易渗透到薄壁区域;而当量直径太大,气体穿透长度会减小。最后,还给出了一些气道设计的基本原则。 相似文献
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Rob Klaassen 《Filtration+Separation》2003,40(10):26-28
Membrane gas absorption (MGA) is an efficient and flexible way to carry out gas-liquid (G-L) contacting operations with hollow fibre membranes. The main advantages of membrane gas absorption over conventional G-L contactors is the compactness and low weight of the installation, the standard modular construction elements and the flexible operation. Gas and liquid flow can be controlled independently in the MGA process, which makes operation over a wide range of liquid and gas flow rates possible. In a MGA installation no entrainment, flooding, channelling or foaming occurs. Rob Klaassen and Albert E Jansen, TNO Environment, Energy and Process Innovation, discuss the principle of this technology, the benefits of newly developed membrane modules and their potential applications. 相似文献
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A comparative study of nine synthesis gas technologies have been carried out. The basis was syngas feed to a 2500 MTPD methanol plant. Material and energy balances were calculated, investments and operational costs were estimated, and a comparison was made. The comparison indicates that autothermal reforming and combined reforming with prereformer are preferable among the proven technologies. Among emerging technologies GHR, KRES and CPO have an economic advantage. However, the margins are probably too small to be significant. 相似文献