Article(id=1242130701261276115, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1242130688619647436, articleNumber=null, orderNo=null, doi=10.3981/j.issn.1000-7857.2013.22.005, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1362672000000, receivedDateStr=2013-03-08, revisedDate=1368374400000, revisedDateStr=2013-05-13, acceptedDate=null, acceptedDateStr=null, onlineDate=1375891200000, onlineDateStr=2013-08-08, pubDate=1375891200000, pubDateStr=2013-08-08, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1375891200000, onlineIssueDateStr=2013-08-08, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774076636849, creator=sys-migrate, updateTime=1774076636849, updator=sys-migrate, issue=Issue{id=1242130688619647436, tenantId=1146029695717560320, journalId=1146031591421210625, year='2013', volume='31', issue='22', pageStart='1', pageEnd='96', issueExtLink='null', onlineDate='null', pubDate='1375891200000', pubDateStr='2013-08-08', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=3, issueType=-1, specialIssue=null, createTime=1774076633836, creator='sys-migrate', updateTime=1774076633836, updator='sys-migrate', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=36, endPage=39, ext={EN=ArticleExt(id=1242130706713874938, articleId=1242130701261276115, tenantId=1146029695717560320, journalId=1146031591421210625, language=EN, title=A Mathematical Model for Gas-water Two-phase Nonlinear Flow in Low Permeability Coal Reservoirs and Calculation Analysis, columnId=1242116080374710456, journalTitle=Science & Technology Review, columnName=Articles, runingTitle=null, highlight=null, articleAbstract=The transport behavior of fluids in low permeability coalbed methane reservoirs is analyzed with considerations of the desorption and diffusion effects of the coalbed methane and the threshold pressure gradient. A mathematical model for gas-water two-phase nonlinear flow is established for low permeability coal reservoirs. The governing equations for the gas-water two-phase nonlinear flow are derived. The case study shows that, when the liquid phase threshold pressure gradient is increased from 0.001MPa/m to 0.007Mpa/m, the maximum gas production of coal reservoirs is reduced by nearly 15%; compared with the liquid phase threshold pressure gradient of 0.001MPa/m, the maximum gas production without the threshold pressure gradient is increased by nearly 7% and the cumulative gas production also has a certain extent of increase. Therefore the existence of the threshold pressure gradient makes the fluid in fractures more difficult to flow and leads to a low production rate. The case study shows that the mathematical model of the gas-water two-phase nonlinear flow could provide a theoretical basis for defining a reasonable gas-well deliverability of low permeability coal reservoirs., authors=ZHU Weiyao¹, DONG He¹, SONG Hongqing¹, YANG Jiaosheng², YUE Ming¹, authorsList=ZHU Weiyao;DONG He;SONG Hongqing;YANG Jiaosheng;YUE Ming, authorCompany=1. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China;2. PetroChina Research Institute of Petroleum Exploration & Development-Langfang Branch Institute, Langfang 065007, Hebei Province, China, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=ShN6NtG0nEqC8qwt8/FDmQ==, pdfFileSize=1194587, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1242130705598190064, articleId=1242130701261276115, tenantId=1146029695717560320, journalId=1146031591421210625, language=CN, title=低渗透煤层气水两相非线性渗流数学模型及计算分析, columnId=1146540929516700224, journalTitle=科技导报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=在考虑煤层气的解吸和扩散效应及启动压力梯度的基础上,对低渗透煤层气藏流体输运特性进行分析,建立了低渗透煤层气水两相非线性渗流数学模型,推导出非线性渗流阶段气水两相的控制方程组。通过实例计算表明,液相拟启动压力梯度从0.001MPa/m增加至0.007MPa/m,煤层产气峰值下降约15%;不考虑启动压力梯度时的产气峰值量要比液相拟启动压力梯度为0.001MPa/m的产气峰值提升约7%。因此启动压力梯度的存在阻碍了裂隙中流体的流动,对煤层气开发影响较大。, authors=朱维耀¹, 董熇¹, 宋洪庆¹, 杨焦生², 岳明¹, authorsList=朱维耀;董熇;宋洪庆;杨焦生;岳明, authorCompany=1. 北京科技大学土木与环境工程学院, 北京 100083;2. 中国石油勘探开发研究院廊坊分院, 河北廊坊 065007, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=5w4NXbMo35emP57X2Kkd/w==, pdfFileSize=1194587, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null)}, authors=null, keywords=[Keyword(id=1242130705220702700, tenantId=1146029695717560320, journalId=1146031591421210625, 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