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yyyyhu木蟲 (小有名氣)
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[求助]
求助 英文摘要翻譯成漢語
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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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RXMCDM: 金幣+2, 多謝應助！ 2014-08-07 12:56:07
yyyyhu: 金幣+500, 翻譯EPI+1, ★★★★★最佳答案, 很好，很強大！謝謝 2014-08-07 14:13:53
RXMCDM: 金幣+2, 多謝應助！ 2014-08-07 12:56:07
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長谷（Long Valley）位于內(nèi)華達州之白松縣西側，距離西北部的伊利(Ely)大約60英里、北方盛產(chǎn)石油的鐵路谷（Railroad Valley）75英里。 長谷地域結構特點由三次造山運動造成：第一次發(fā)生于古生代的中期，第二次于中生代后期，第三次則發(fā)生于新生代后半期。前兩次造山運動是擠壓性的，而第三次則為伸展性。這三次造山運動所產(chǎn)生的各種構造圈閉便于碳氫化合物（油氣）的集聚。 在長谷地區(qū)完整的古生代部分超過30000英尺，在遠景區(qū)最低20000英尺仍然有儲存碳氫化合物之潛力。第三部分厚度極少超過8000英尺，通常小于3000英尺。 在長谷地區(qū)只鉆了五口油井。第一口鉆于1966年，最后兩口則鉆于1985年。這五口井都有新鮮石油出現(xiàn)，表明該地區(qū)有碳氫化合物存在。在內(nèi)華達州東部中心地區(qū)，主要的石油源巖位于密西西比的Chainman Shale，包含大約1000英尺富含有機質(zhì)的黑色頁巖，位于世界上最好的油源巖之列。其他石油源巖包括Pilot頁巖和在預密西西比地層的部分地區(qū)發(fā)現(xiàn)的富含有機質(zhì)碳酸鹽巖和頁巖。地球化學分析表明，與寒武系一樣古老的各種石油源巖仍然能夠產(chǎn)生碳氫化合物（石油）。 測井數(shù)據(jù)顯示，在Chainman地區(qū)存在砂巖氣藏。而在泥盆系及奧陶時代的賓夕法尼亞州的碳酸鹽中則有多孔隙性儲層。 在碳酸鹽巖晶存在斷裂和晶洞孔隙度，滲透性非常高，引起很高的流速，通常超過1000 BPD。每80英畝預計儲量各地變化不等，由瓊娜（Joana）的1,450,000桶到Pogonip的超過500萬桶。很明顯，在溫和地區(qū)更具有大儲量的潛能。 |
2樓2014-08-07 12:52:55
3樓2014-08-07 13:08:12
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