用标度理论估计页岩气井的储气量-凯发k8官网

用标度理论估计页岩气井的储气量
文章来源:未知 文章作者:enread 发布时间:2013-11-19 05:41 字体: [ ] 
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researchers at the university of texas at austin have developed a simple scaling theory(标度理论) to estimate gas production from 1(水压的) fractured wells in the barnett 2. the method is intended to help the energy industry 3 identify low- and high-producing horizontal wells, as well as accurately predict how long it will take for gas reserves to 4 in the wells. using historical data from horizontal wells in the barnett shale formation in north texas, tad patzek, professor and chair in the department of 5 and geosystems engineering in the cockrell school of engineering; michael marder, professor of physics in the college of natural sciences; and frank male, a graduate student in physics, used a simple physics theory to model the rate at which production from the wells declines over time, known as the "decline curve."
 
they describe their new model of the decline curve in the paper "gas production in the barnett shale obeys a simple scaling theory," published this week in the 6 of the national academy of sciences. to test their theory, the researchers 7 10 years of gas production data from the barnett shale 8 to the university by ihs cera, a provider of global market and economic information.
 
on average, they found that gas production in individual wells begins declining after about five years of production. they also found that wells generally produce less gas than predicted under previous, theoretical models and that production can be increased if hydrofractures connected better to the natural fractures in the rock.
 
the team's estimates were an instrumental part of the comprehensive 9 of barnett shale reserves funded by the alfred p. sloan foundation and issued earlier this year by the bureau of economic geology at ut austin.
 
until now, estimates of shale gas production have primarily relied on models established for conventional oil and gas wells, which behave differently from the horizontal wells in gas-rich 10.
 
the researchers estimate the ultimate gas recovery from a sample of 8,294 horizontal wells in the barnett shale will be between 10 trillion and 20 trillion standard cubic feet (scf) during the lifetime of the wells. the study's well sample is made up of about half of the 15,000 existing wells in the barnett shale, the geological formation outside fort worth that offers the longest production history for hydrofractured horizontal wells in the world.
 
"with our model at hand, you can better predict how much gas volume is left and how long it will take until that volume will be depleted," patzek said. "we are able to match historical production and predict future production of thousands of horizontal gas wells using this scaling theory."
 
"the contributions of shale gas to the u.s. economy are so enormous that even small corrections to production estimates are of great practical significance," patzek said.
 
the researchers were surprised by how all of the wells they analyzed adhere to that simple scaling curve.
 
"by 11 the basic physics 12 gas recovery from hydrofractured wells, we calculated a single curve that should describe how much gas comes out over time, and we showed that production from thousands of wells follows this curve," marder said.
 
patzek adds: "we are able to predict when the decline will begin. once decline sets in, gas production goes down rapidly."


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1 8c2c82f005eaf796f07593208d20c55d     
透明质地
参考例句:
  • tys165-2 bulldozer is semi-rigid suspended, power shift, hydraulically controlled and track type. tys165-2湿地推土机系半刚性悬挂、液力传动、液压操纵的履带推土机。
  • pulverized coal ash is hydraulically filled on ground of zishan. 紫山灰场粉煤灰作为一种冲填土,粒度细,似粉砂。
2 cevyj     
n.页岩,泥板岩
参考例句:
  • we can extract oil from shale.我们可以从页岩中提取石油。
  • most of the rock in this mountain is shale.这座山上大部分的岩石都是页岩。
3 ojhyf     
adv.准确地,精确地
参考例句:
  • it is hard to hit the ball accurately.准确地击中球很难。
  • now scientists can forecast the weather accurately.现在科学家们能准确地预报天气。
4 bm2z3     
v.弄空,排除,减轻,减少...体液,放去...的血
参考例句:
  • most native mammal species have been severely depleted.大多数本地哺乳动物的数量都已经大大减少了。
  • elastic collisions deplete very little of the electron's energy.弹性碰撞中电子减少的能量非常少。
5 wiuyi     
n.原油,石油
参考例句:
  • the government of iran advanced the price of petroleum last week.上星期伊朗政府提高了石油价格。
  • the purpose of oil refinery is to refine crude petroleum.炼油厂的主要工作是提炼原油。
6 wk2zvx     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • he was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
7 483f1acae53789fbee273a644fdcda80     
v.分析( analyze的过去式和过去分词 );分解;解释;对…进行心理分析
参考例句:
  • the doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。 来自《简明英汉词典》
  • the young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程,因为对他来说,爱是个不可分析的迷。 来自《简明英汉词典》
8 ipmzni     
adj.得到许可的v.许可,颁发执照(license的过去式和过去分词)
参考例句:
  • the new drug has not yet been licensed in the us. 这种新药尚未在美国获得许可。
  • is that gun licensed? 那支枪有持枪执照吗?
9 vo7yu     
n.评价;评估;对财产的估价,被估定的金额
参考例句:
  • this is a very perceptive assessment of the situation.这是一个对该情况的极富洞察力的评价。
  • what is your assessment of the situation?你对时局的看法如何?
10 470a61efb6b07051a4ac46629a4b3e81     
n.页岩( shale的名词复数 )
参考例句:
  • sandstones are, as a rule, interbedded with shales. 砂岩通常都与页岩互层。 来自辞典例句
  • oil-yielding organic matter is contained in the shales. 在这些页岩里有产油的有机物质。 来自辞典例句
11 be408cc8d92ec310bb6260bc127c162b     
v.分析;分析( analyze的现在分词 );分解;解释;对…进行心理分析n.分析
参考例句:
  • analyzing the date of some socialist countries presents even greater problem s. 分析某些社会主义国家的统计数据,暴露出的问题甚至更大。 来自辞典例句
  • he undoubtedly was not far off the mark in analyzing its predictions. 当然,他对其预测所作的分析倒也八九不离十。 来自辞典例句
12 5fyz8c     
adj.在下面的,含蓄的,潜在的
参考例句:
  • the underlying theme of the novel is very serious.小说隐含的主题是十分严肃的。
  • this word has its underlying meaning.这个单词有它潜在的含义。
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