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yyyyhu

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The Long Valley, in western White Pine County, Nevada, is approximately 60 mi northwest of Ely and 75 mi north of the oil production in Railroad Valley.
       Structures in the Long Valley area result from three orogenies: the first in the middle of the Paleozoic, the second in the latter part of the Mesozoic, and the third in the second half of the Cenozoic. The first two orogenies were compressional, whereas the third was extensional. These three orogenies have produced a variety of structural traps for hydrocarbon accumulation.
      The complete Paleozoic section in the Long Valley area exceeds 30,000 ft. In the prospect area a minimum of 20,000 ft still has hydrocarbon potential. The Tertiary section is rarely thicker than 8,000 ft and is commonly thinner than 3,000 ft.
      Only five wells have been drilled in Long Valley, the first in 1966, the last two in 1985. All five wells had shows of live oil indicating that hydrocarbons are present in the area. The primary petroleum source rock in east central Nevada is the Mississippian Chainman Shale that contains approximately 1,000 ft of organic-rich black shale and is among the best oil source rocks in the world. Other source rocks include the Pilot Shale and the organic-rich carbonates and shales found  in parts of the pre-Mississippian formations. Geochemical analyses show that viable source rocks as old as Cambrian are still capable of generating hydrocarbons.
     Log data show the presence of gad sandstone reservoirs in the Chainman and very porous reservoirs in the carbonates of Pennsylvanian, Devonian, and Ordovician age. The carbonates  have intergranular, fracture, and vuggy porosity. Permeabilities are quite high, resulting in high  flow rates, commonly more than 1,000 BPD. Estimated reserves per 80 acres vary from  1,450,000 barrels in the Joana to more than 5,000,000 barrels  in the Pogonip. The potential for  large reserves in a field of modest areal extent is obvious.
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ssssllllnnnn

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RXMCDM: 金币+2, 多谢应助! 2014-08-07 12:56:07
yyyyhu: 金币+500, 翻译EPI+1, ★★★★★最佳答案, 很好,很强大!谢谢 2014-08-07 14:13:53
长谷(Long Valley)位于内华达州之白松县西侧,距离西北部的伊利(Ely)大约60英里、北方盛产石油的铁路谷(Railroad Valley)75英里。
长谷地域结构特点由三次造山运动造成:第一次发生于古生代的中期,第二次于中生代后期,第三次则发生于新生代后半期。前两次造山运动是挤压性的,而第三次则为伸展性。这三次造山运动所产生的各种构造圈闭便于碳氢化合物(油气)的集聚。
在长谷地区完整的古生代部分超过30000英尺,在远景区最低20000英尺仍然有储存碳氢化合物之潜力。第三部分厚度极少超过8000英尺,通常小于3000英尺。
在长谷地区只钻了五口油井。第一口钻于1966年,最后两口则钻于1985年。这五口井都有新鲜石油出现,表明该地区有碳氢化合物存在。在内华达州东部中心地区,主要的石油源岩位于密西西比的Chainman Shale,包含大约1000英尺富含有机质的黑色页岩,位于世界上最好的油源岩之列。其他石油源岩包括Pilot页岩和在预密西西比地层的部分地区发现的富含有机质碳酸盐岩和页岩。地球化学分析表明,与寒武系一样古老的各种石油源岩仍然能够产生碳氢化合物(石油)。
测井数据显示,在Chainman地区存在砂岩气藏。而在泥盆系及奥陶时代的宾夕法尼亚州的碳酸盐中则有多孔隙性储层。
在碳酸盐岩晶存在断裂和晶洞孔隙度,渗透性非常高,引起很高的流速,通常超过1000 BPD。每80英亩预计储量各地变化不等,由琼娜(Joana)的1,450,000桶到Pogonip的超过500万桶。很明显,在温和地区更具有大储量的潜能。
2楼2014-08-07 12:52:55
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第七天堂

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2楼: Originally posted by ssssllllnnnn at 2014-08-07 12:52:55
长谷(Long Valley)位于内华达州之白松县西侧,距离西北部的伊利(Ely)大约60英里、北方盛产石油的铁路谷(Railroad Valley)75英里。
长谷地域结构特点由三次造山运动造成:第一次发生于古生代的中期,第二次于中 ...

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3楼2014-08-07 13:08:12
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