共查询到20条相似文献,搜索用时 125 毫秒
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油田低渗透油藏开发中需要通过注水的方式提升开采效率,针对低渗透油藏特点进行分析,从注水技术、注采关系等方面进行研究,实现对注采井网的调整,以及低渗透油藏的综合治理,合理控制油井含水量,提升油田产量。通过分析低渗透油藏治理难点,提出相应的治理措施。 相似文献
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总结了复杂小断块油田高含水期增储稳产的开发思路和主要做法。确立了开发思路后 ,加强地质基础研究 ,开展油藏精细描述 ,深化油藏认识是基础。恢复、优化、调整注采井网 ,提高水驱控制与水驱动用储量 ,应用先进的开采工艺技术 ,改善注水开发效果 ,滚动扩边增储是油田高含水期稳产的有效手段 相似文献
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油田进入中、高含水期后,注水开发油田的平面、层间、层内三大矛盾,在注水、产液、储采三大结构的问题日益突出。马寨油田进入高含水开发后期,伴随着井况的恶化,油田的开发效果难以提高,递减的控制难度加大。2001年以后,通过油藏工程研究为基础,以井网层系调整、注水工艺为手段,进一步地精细地质研究,深化油藏认识,落实了储层和构造,掌握了剩余油分布规律。并依靠现有井网,综合实施油田调整,大力度地实施分注及差层改造技术,全面地提高一、二、三类层的动用,从而改善油田的开发效果,实现高含水开发后期的油田稳产。 相似文献
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B. A. Bierl-Leonhardt D. S. Moreno M. Schwarz H. S. Forster J. R. Plimmer E. D. Devilbiss 《Journal of chemical ecology》1982,8(4):689-699
The sex pheromone of the Comstock mealybug,Pseudococcus comstocki (Kuwana) was isolated from volatiles trapped from air passing over virgin female insects. Combined gas chromatography, mass and infrared spectroscopy, and microreactions indicated that the structure was 2,6-dimethyl-1,5-heptadien-3-ol acetate. This was confirmed by synthesis; several analogs were also prepared. The natural and synthetic pheromone caused similar trap capture of male insects. Synthetic analogs were significantly less attractive in field tests and the addition of minor amounts of the corresponding alcohol to the pheromone appeared to enhance trap capture, but the results were not statistically conclusive. 相似文献
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Synthesis, Structure, and Reactions of Hydride, Borohydride, and Aluminohydride Compounds of the f-Elements 总被引:1,自引:0,他引:1
Ephritikhine M 《Chemical reviews》1997,97(6):2193-2242
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成功的塑料热成型工艺解决方案,要求对加工工艺、模具设计、材料性能等因素进行全面综合分析。众多的热成型加工厂商往往只着眼于调整和改进工艺,以此来解决生产过程中所遇到的各种制品缺陷问题。其中采取的措施包括:试图延长加工循环周期、二次加工工序、或者通过改良设备装置 相似文献
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K. Puttanna N.M. Nanje Gowda E.V.S. Prakasa Rao 《Nutrient Cycling in Agroecosystems》1999,54(3):251-257
Laboratory experiments were carried out to study the effect of various factors that affect the efficacy of the nitrification inhibitors, benzotriazole, o-nitrophenol, m-nitroaniline and dicyandiamide. In a Paleustalf, increasing concentrations of the inhibitors from 0 to 15 mg/kg soil prolonged the nitrification up to 60 days. Increase in temperature from 10 to 30°C decreased the efficacy of all four nitrification inhibitors (by 6–62% at 30 days). Benzotriazole was equally effective in soil moisture conditions ranging from 40 to 80% of the maximum water holding capacity of the soil (WHC). o-Nitrophenol and m-nitroaniline were more effective at 60% WHC, while the efficacy of DCD was more at 40% WHC. Addition of 1000 mg/kg soil of fresh organic matter reduced the efficacies of o-nitrophenol, m-nitroaniline and benzotriazole by 55, 65 and 22%, respectively while the reduction in the efficacy of dicyandiamide was non-significant. Liming an acidic soil (Kandiustalf) to change the pH from 5.4 to 8.3 decreased the efficacies of the nitrification inhibitors and decreased the ammonium content in the soil at 30 days from 55 to 9 mg/kg in case of o-nitrophenol and m-nitroaniline and from 53 to 35 mg/kg in case of benzotriazole and dicyandiamide. 相似文献
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综合使用溶剂萃取法和化学沉淀法,研究了从镍钴铜铁和稀土混合废料中分离各主要有价金属元素的工艺条件。通过前处理,得到有价金属溶液,调节pH值为2.0沉淀稀土元素,在pH值为1.0时用Acorga M5640萃取分离铜,再在pH值等于5.0时用Cyanex 272萃取钴,剩余水相溶液用来制取镍皂,从而使镍钴铜铁和稀土元素逐步得以分离提纯处理,达到处理含镍钴铜铁和稀土元素的混合废料,回收有用物质,控制污染,保护环境的目的。 相似文献