Article(id=1322942695592829709, tenantId=1146029695717560320, journalId=1322258508890079423, issueId=1322942002035295141, articleNumber=null, orderNo=null, doi=10.13809/j.cnki.cn32-1825/te.2025281, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1762790400000, receivedDateStr=2025-11-11, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793343717715, onlineDateStr=2026-10-30, pubDate=1790352000000, pubDateStr=2026-09-26, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793343717715, onlineIssueDateStr=2026-10-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793343717715, creator=13701087609, updateTime=1793343717715, updator=13701087609, issue=Issue{id=1322942002035295141, tenantId=1146029695717560320, journalId=1322258508890079423, year='2026', volume='16', issue='5', pageStart='949', pageEnd='1136', issueExtLink='null', onlineDate='null', pubDate='1790352000000', pubDateStr='2026-09-26', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793343552359, creator='13701087609', updateTime=1793344212649, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322944771945267389, tenantId=1146029695717560320, journalId=1322258508890079423, issueId=1322942002035295141, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322944771945267390, tenantId=1146029695717560320, journalId=1322258508890079423, issueId=1322942002035295141, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1053, endPage=1060, ext={EN=ArticleExt(id=1322942697408963343, articleId=1322942695592829709, tenantId=1146029695717560320, journalId=1322258508890079423, language=EN, title=A method for calculating bottom-hole flowing pressure in deep coalbed methane wells, columnId=1322941693024141328, journalTitle=Petroleum Reservoir Evaluation and Development, columnName=Oil and Gas Development, runingTitle=null, highlight=
Accurate acquisition of bottom-hole flowing pressure in coalbed methane (CBM) wells is of great significance for optimizing drainage and production processes and improving CBM recovery. However, existing methods for calculating bottom-hole flowing pressure generally have problems such as high economic cost, poor data timeliness, limited applicability, or insufficient accuracy. In particular, deep CBM wells usually employ gas-lift drainage and production, and the dynamic liquid level data is difficult to obtain, which renders traditional wellbore flow models inapplicable and seriously constrains dynamic monitoring and production optimization of these wells. To solve this problem, a new method for calculating bottom-hole flowing pressure in deep CBM wells was proposed, aiming to quickly and accurately calculate bottom-hole flowing pressure using wellhead casing pressure data in the absence of dynamic liquid level data by establishing a more accurate wellbore flow model. In this method, a nonlinear formula for characterizing the dynamic liquid level position was innovatively proposed, and the vertical wellbore was divided from top to bottom into a pure gas column section and a gas-water two-phase liquid column section based on the dynamic liquid level position, thereby establishing a refined wellbore flow model. The pressure of the pure gas column section was calculated using the average temperature and deviation coefficient method, and the pressure of the gas-water two-phase liquid column section was calculated using the Hasan-Kabir analytical method. A comprehensive and efficient numerical iteration method was established to solve the closed strongly nonlinear equation system composed of the nonlinear formula for dynamic liquid level position, the pressure calculation formula for the pure gas column section, and the pressure calculation formula for the gas-water two-phase liquid column section, ultimately obtaining the bottom-hole flowing pressure of deep CBM wells. Finally, taking deep CBM Well A in the Daning-Jixian block of the Ordos Basin as an example, field application testing of the algorithm was conducted. The results indicated that this algorithm significantly improved the accuracy of field flowing-pressure calculation and demonstrated high computational efficiency. In addition, this method showed favorable applicability in production dynamic data analysis, providing efficient and reliable technical support for dynamic monitoring of unconventional gas reservoirs.
, articleAbstract=null, authors=WEI WANG1, YUEJIE YANG2, XIAOGANG LI1, XIA YAN3, WENCHAO LIU2, BINBIN SHI1, ZHENHAO DU2, authorsList=WEI WANG, YUEJIE YANG, XIAOGANG LI, XIA YAN, WENCHAO LIU, BINBIN SHI, ZHENHAO DU, authorCompany=null, correspAuthors=WENCHAO LIU, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, 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=1322942700009431842, articleId=1322942695592829709, tenantId=1146029695717560320, journalId=1322258508890079423, language=CN, title=一种深部煤层气井井底流压的折算方法, columnId=1322941693259022355, journalTitle=油气藏评价与开发, columnName=油气开发, runingTitle=null, highlight=
煤层气井底流压的准确获取对于优化排采工艺、提高煤层气采收率具有重要意义。然而,现有井底流压计算方法普遍存在经济成本高、数据时效性差、适用范围有限或精度不高等问题。特别是深部煤层气井通常采用气举排采方式,动液面位置难以获取,导致传统井筒流动模型无法直接应用,严重制约了深部煤层气井动态监测与生产优化。因此提出了一种深部煤层气井井底流压折算新方法,旨在通过建立更为精确的井筒流动模型,实现在缺少动液面位置数据情况下利用井口套压数据快速、准确计算井底流压的目标。该方法创新提出了表征动液面位置的非线性公式,并按动液面位置将垂直井筒自上而下划分为纯气柱段和气水两相液柱段两部分,以建立精细井筒流动模型;采用平均温度与偏差系数法计算纯气柱段压力,采用Hasan-Kabir解析法计算气水两相液柱段压力;综合创立了高效的数值迭代方法,并且求解了由动液面位置非线性公式、纯气柱段和气水两相液柱段压力计算公式共同构成的封闭强非线性方程组,最终获得了深部煤层气井的井底流压。以鄂尔多斯盆地大宁—吉县区块深部煤层气井A为例对本算法进行了现场应用测试,研究结果表明本算法能显著提高现场流压折算精度,且计算效率高。此外,该方法在生产动态数据分析方面显示出良好的应用性,可为非常规气藏动态监测提供高效可靠的技术支撑。
, articleAbstract=null, authors=王伟1, 杨月洁2, 李小刚1, 闫霞3, 刘文超2, 师斌斌1, 杜振浩2, authorsList=王伟, 杨月洁, 李小刚, 闫霞, 刘文超, 师斌斌, 杜振浩, authorCompany=null, correspAuthors=刘文超, authorNote=
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刘文超(1984—),男,博士,教授,从事非常规油气渗流力学方向的教学与研究工作。地址:北京市海淀区学院路30号,邮政编码:100083。E-mail:
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1 Exploration and Development Construction Company, PetroChina Coalbed Methane Company Limited, Xi'an, Shaanxi 710003, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1322942702408573744, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, authorId=1322942702110778157, language=CN, stringName=王伟, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, address=
1 中石油煤层气有限责任公司勘探开发建设分公司,陕西 西安 710003, bio={"content":"
王伟(1984—),男,硕士,高级工程师,从事煤层气勘探开发研究工作。地址:陕西省西安市莲湖区劳动路115号1106室,邮政编码:710003。E-mail:wangwei23@petrochina.com.cn
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王伟(1984—),男,硕士,高级工程师,从事煤层气勘探开发研究工作。地址:陕西省西安市莲湖区劳动路115号1106室,邮政编码:710003。E-mail:wangwei23@petrochina.com.cn
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2 School of Resources and Safety Engineering, University of Science and Technology Beijing, Beijing 100083, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1322942702739923765, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, authorId=1322942702475682610, language=CN, stringName=杨月洁, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=2, address=
2 北京科技大学资源与安全工程学院,北京 100083, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1322942701934617382, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, xref=2, ext=[AuthorCompanyExt(id=1322942701943005991, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942701934617382, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1 Exploration and Development Construction Company, PetroChina Coalbed Methane Company Limited, Xi'an, Shaanxi 710003, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1322942702962221882, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, authorId=1322942702807032631, language=CN, stringName=李小刚, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=1, address=
1 中石油煤层气有限责任公司勘探开发建设分公司,陕西 西安 710003, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1322942701842342691, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, xref=1, ext=[AuthorCompanyExt(id=1322942701850731300, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942701842342691, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 Exploration and Development Construction Company, PetroChina Coalbed Methane Company Limited, Xi'an, Shaanxi 710003, China), AuthorCompanyExt(id=1322942701875897125, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942701842342691, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 中石油煤层气有限责任公司勘探开发建设分公司,陕西 西安 710003)])]), Author(id=1322942703033525052, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1322942703230657342, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, authorId=1322942703033525052, language=EN, stringName=XIA YAN, firstName=XIA, middleName=null, lastName=YAN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=3, address=
3 China United Coalbed Methane National Engineering Research Center Co., Ltd., Beijing 100095, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1322942703314543423, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, authorId=1322942703033525052, language=CN, stringName=闫霞, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=3, address=
3 中联煤层气国家工程研究中心有限责任公司,北京 100095, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1322942702022697769, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, xref=3, ext=[AuthorCompanyExt(id=1322942702035280682, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942702022697769, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2 北京科技大学资源与安全工程学院,北京 100083, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1322942701934617382, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, xref=2, ext=[AuthorCompanyExt(id=1322942701943005991, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942701934617382, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1 中石油煤层气有限责任公司勘探开发建设分公司,陕西 西安 710003, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1322942701842342691, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, xref=1, ext=[AuthorCompanyExt(id=1322942701850731300, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942701842342691, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1 Exploration and Development Construction Company, PetroChina Coalbed Methane Company Limited, Xi'an, Shaanxi 710003, China), AuthorCompanyExt(id=1322942701875897125, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942701842342691, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 中石油煤层气有限责任公司勘探开发建设分公司,陕西 西安 710003)]), AuthorCompany(id=1322942701934617382, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, xref=2, ext=[AuthorCompanyExt(id=1322942701943005991, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942701934617382, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 School of Resources and Safety Engineering, University of Science and Technology Beijing, Beijing 100083, China), AuthorCompanyExt(id=1322942701951394600, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942701934617382, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 北京科技大学资源与安全工程学院,北京 100083)]), AuthorCompany(id=1322942702022697769, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, xref=3, ext=[AuthorCompanyExt(id=1322942702035280682, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942702022697769, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3 China United Coalbed Methane National Engineering Research Center Co., Ltd., Beijing 100095, China), AuthorCompanyExt(id=1322942702043669291, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, companyId=1322942702022697769, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3 中联煤层气国家工程研究中心有限责任公司,北京 100095)])], figs=[ArticleFig(id=1322942707164914525, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=EN, label=Fig.1, caption=
Physical model of fluid flow in wellbore of deep CBM Well A in Daning-Jixian block of Ordos Basin, figureFileSmall=TgIV5qSQKRgq0/RdKliCmA==, figureFileBig=EhvLAeYsUBlS9Y/wON522A==, tableContent=null), ArticleFig(id=1322942707244606302, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=CN, label=图1, caption=
鄂尔多斯盆地大宁—吉县区块深部煤层气井A井筒流动物理模型注:H为井筒深度,单位m;hL为动液面位置,单位m;pc为现场实测的井口套压,单位MPa;pwf为需计算的井底流压,单位MPa;pg为纯气柱压力,单位MPa;ΔpL为气、水两相液柱段压差,单位MPa;图中箭头指示流动方向。
, figureFileSmall=TgIV5qSQKRgq0/RdKliCmA==, figureFileBig=EhvLAeYsUBlS9Y/wON522A==, tableContent=null), ArticleFig(id=1322942707496264543, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=EN, label=Fig.2, caption=
Flowchart for calculating bottom-hole flowing pressure of deep CBM Well A in Daning-Jixian block of Ordos Basin by numerical iteration, figureFileSmall=S7ZlcfDsOGT8MAqV7FK20Q==, figureFileBig=DL/wXk0gu6pyjE2NWrsQsg==, tableContent=null), ArticleFig(id=1322942707567567712, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=CN, label=图2, caption=
鄂尔多斯盆地大宁—吉县区块深部煤层气井A井底流压数值迭代求解流程, figureFileSmall=S7ZlcfDsOGT8MAqV7FK20Q==, figureFileBig=DL/wXk0gu6pyjE2NWrsQsg==, tableContent=null), ArticleFig(id=1322942707668231009, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=EN, label=Fig.3, caption=
Daily water production of deep CBM Well A in Daning-Jixian block of Ordos Basin, figureFileSmall=zv4FxYqXYi8IbxWsUGbVig==, figureFileBig=U2hr7Oa4OIHhICQEKutenw==, tableContent=null), ArticleFig(id=1322942707752117090, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=CN, label=图3, caption=
鄂尔多斯盆地大宁—吉县区块深部煤层气井A日产水量, figureFileSmall=zv4FxYqXYi8IbxWsUGbVig==, figureFileBig=U2hr7Oa4OIHhICQEKutenw==, tableContent=null), ArticleFig(id=1322942707819225955, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=EN, label=Fig.4, caption=
Daily gas production of deep CBM Well A in Daning-Jixian block of Ordos Basin, figureFileSmall=/ydzDwAVP7UZi7flV4v//A==, figureFileBig=MFXFGRoOZowjJxS7t/9QLA==, tableContent=null), ArticleFig(id=1322942707907306340, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=CN, label=图4, caption=
鄂尔多斯盆地大宁—吉县区块深部煤层气井A日产气量, figureFileSmall=/ydzDwAVP7UZi7flV4v//A==, figureFileBig=MFXFGRoOZowjJxS7t/9QLA==, tableContent=null), ArticleFig(id=1322942708171547493, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=EN, label=Fig.5, caption=
Wellhead casing pressure of deep CBM Well A in Daning-Jixian block of Ordos Basin, figureFileSmall=SbUzHNBuSXPIb5nskqU1Rg==, figureFileBig=jJd42OHrxbx0De9eUssY+w==, tableContent=null), ArticleFig(id=1322942708234462054, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=CN, label=图5, caption=
鄂尔多斯盆地大宁—吉县区块深部煤层气井A井口套压, figureFileSmall=SbUzHNBuSXPIb5nskqU1Rg==, figureFileBig=jJd42OHrxbx0De9eUssY+w==, tableContent=null), ArticleFig(id=1322942708301570919, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=EN, label=Fig.6, caption=
Actual bottom-hole flowing pressure of deep CBM Well A in Daning-Jixian block of Ordos Basin, figureFileSmall=uVxGbUlxB1iPtmGeODC8cg==, figureFileBig=rq/Yl6tNdelOxwX4v+a/tw==, tableContent=null), ArticleFig(id=1322942708645503848, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=CN, label=图6, caption=
鄂尔多斯盆地大宁—吉县区块深部煤层气井A实测井底流压, figureFileSmall=uVxGbUlxB1iPtmGeODC8cg==, figureFileBig=rq/Yl6tNdelOxwX4v+a/tw==, tableContent=null), ArticleFig(id=1322942708716807017, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=EN, label=Fig.7, caption=
Nonlinear fitting process of bottom-hole flowing pressure of deep CBM Well A in Daning-Jixian block of Ordos Basin, figureFileSmall=pc2Xb6QqRejxfxTgFtzbxA==, figureFileBig=TLdkPGQ9IlqcS0YckJiCJw==, tableContent=null), ArticleFig(id=1322942708788110186, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=CN, label=图7, caption=
鄂尔多斯盆地大宁—吉县区块深部煤层气井A井底流压非线性拟合过程, figureFileSmall=pc2Xb6QqRejxfxTgFtzbxA==, figureFileBig=TLdkPGQ9IlqcS0YckJiCJw==, tableContent=null), ArticleFig(id=1322942708851024747, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=EN, label=Fig.8, caption=
Calibration plot of bottom-hole flowing pressure calculation results of deep CBM Well A in Daning-Jixian block of Ordos Basin, figureFileSmall=6U4A32R0ml+YBSnXZcYUmg==, figureFileBig=00hhXmOkdGPqvtCREv/+Yg==, tableContent=null), ArticleFig(id=1322942708909745004, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=CN, label=图8, caption=
鄂尔多斯盆地大宁—吉县区块深部煤层气井A井底流压计算结果校准图, figureFileSmall=6U4A32R0ml+YBSnXZcYUmg==, figureFileBig=00hhXmOkdGPqvtCREv/+Yg==, tableContent=null), ArticleFig(id=1322942708976853869, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=EN, label=Fig.9, caption=
Comparison of Blasingame production decline analysis of dynamic production data of deep CBM Well A in Daning-Jixian block of Ordos Basin, figureFileSmall=ZJF+m6TPuMTwpxX0H+WobQ==, figureFileBig=9peAxv0eo98HuW3o5B1VQA==, tableContent=null), ArticleFig(id=1322942710641992558, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=CN, label=图9, caption=
鄂尔多斯盆地大宁—吉县区块深部煤层气井A生产动态数据的Blasingame产量递减分析对比, figureFileSmall=ZJF+m6TPuMTwpxX0H+WobQ==, figureFileBig=9peAxv0eo98HuW3o5B1VQA==, tableContent=null), ArticleFig(id=1322942710717490031, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=EN, label=Table 1, caption=
Relevant parameters for calculating flowing pressure of deep CBM Well A in Daning-Jixian block of Ordos Basin, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量名称 | 默认值 | 变量名称 | 默认值 |
|---|
| 原始地层压力/MPa | 22 | 气体摩尔质量(Mg)/(g/mol) | 16.5 |
| 井深(H)/m | 2 500 | 液体压力梯度(γL)/(MPa/m) | 0.01 |
| 井口温度(Tc)/℃ | 20 | 油管的绝对粗糙度(e)/m | 0.000 015 2 |
| 井底储层温度(Tw)/℃ | 70 | 纯气柱段压力计算的数值迭代精度/MPa | 0.001 |
| 油管半径(d1)/m | 0.051 | 气水两相液柱段压力计算的数值迭代精度/MPa | 0.001 |
| 套管半径(d2)/m | 0.061 | 井底流压计算的数值迭代精度(ε)/MPa | 0.001 |
| 相对密度(γg) | 0.57 | | |
), ArticleFig(id=1322942710813959024, tenantId=1146029695717560320, journalId=1322258508890079423, articleId=1322942695592829709, language=CN, label=表1, caption=
鄂尔多斯盆地大宁—吉县区块深部煤层气井A流压计算相关参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量名称 | 默认值 | 变量名称 | 默认值 |
|---|
| 原始地层压力/MPa | 22 | 气体摩尔质量(Mg)/(g/mol) | 16.5 |
| 井深(H)/m | 2 500 | 液体压力梯度(γL)/(MPa/m) | 0.01 |
| 井口温度(Tc)/℃ | 20 | 油管的绝对粗糙度(e)/m | 0.000 015 2 |
| 井底储层温度(Tw)/℃ | 70 | 纯气柱段压力计算的数值迭代精度/MPa | 0.001 |
| 油管半径(d1)/m | 0.051 | 气水两相液柱段压力计算的数值迭代精度/MPa | 0.001 |
| 套管半径(d2)/m | 0.061 | 井底流压计算的数值迭代精度(ε)/MPa | 0.001 |
| 相对密度(γg) | 0.57 | | |
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