Article(id=1153992904512103086, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1153992893040677529, articleNumber=1671-1807(2025)06-0085-08, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1728230400000, receivedDateStr=2024-10-07, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1753062948587, onlineDateStr=2025-07-21, pubDate=1742832000000, pubDateStr=2025-03-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753062948587, onlineIssueDateStr=2025-07-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753062948587, creator=13701087609, updateTime=1753062948587, updator=13701087609, issue=Issue{id=1153992893040677529, tenantId=1146029695717560320, journalId=1146123222451335185, year='2025', volume='25', issue='6', pageStart='1', pageEnd='376', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1753062945851, creator=13701087609, updateTime=1755224695430, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1163059927997072066, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1153992893040677529, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1163059927997072067, tenantId=1146029695717560320, journalId=1146123222451335185, issueId=1153992893040677529, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=85, endPage=92, ext={EN=ArticleExt(id=1153992905304826551, articleId=1153992904512103086, tenantId=1146029695717560320, journalId=1146123222451335185, language=EN, title=Numerical Simulation of the Effect of Cementation Strength on Crack Growth in Conglomerate, columnId=1151876674645226399, journalTitle=Science Technology and Industry, columnName=Technology Innovation, runingTitle=null, highlight=null, articleAbstract=
Conglomerate reservoir is an important type of unconventional oil and gas reservoir. During the development process, it is found that the nature of the cementation surface between the gravel and the matrix affects the fracture propagation behavior. In order to clarify the effect of cementation strength on crack growth, a numerical model of conglomerate uniaxial compression was established by using PFC2D discrete element package, and four stages of crack growth and micro-fracture mechanism were studied. The results show that the mechanical properties of conglomerate gradually change from plastic to brittle with the increase of cementation strength, and the critical cementation strength ratio is 0.3.The influence of cementation strength on crack growth is mainly in the elastic stage and the stable crack growth stage. Under weak cementation (CSR<0.3), isolated shear cracks occur on the gravel edges in the elastic stage, and shear crack networks are connected in the stable growth stage. Under strong cementation (CSR>0.3), there are almost no cracks in the elastic stage of the gravel edge, and only sporadic isolated tensile cracks in the stable crack growth stage. The additional stress caused by the disharmony of deformation between gravel and matrix under weak cementation is the reason that the edge of gravel is the first to break and form an isolated fracture. These results indicate that weak cementation is conducive to the formation of complex fracture networks. A reference is provided for revealing the fracture propagation law of conglomerate reservoir.
, correspAuthors=Jiahao CHENG, 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, authorCompany=null, fund=null, authors=null, authorsList=Jiazheng QUAN, Jiahao CHENG), CN=ArticleExt(id=1153992947616965521, articleId=1153992904512103086, tenantId=1146029695717560320, journalId=1146123222451335185, language=CN, title=胶结强度对砾岩裂纹扩展影响的数值模拟, columnId=1151876674787832737, journalTitle=科技和产业, columnName=科技创新, runingTitle=null, highlight=null, articleAbstract=
砾岩油藏是重要的非常规油气藏类型。在开发过程中发现,砾石与杂基间的胶结面性质影响了裂缝扩展行为。为厘清胶结强度对裂纹扩展的影响规律,通过颗粒流程序(PFC2D)离散元方法建立了砾岩单轴压缩数值模型,研究了裂纹扩展的四个阶段和破裂机制。结果表明:砾岩力学性质随胶结强度增强逐渐由塑性向脆性转变,临界胶结强度比CSRc为0.3,胶结强度对裂纹扩展的影响主要集中在弹性阶段和裂纹稳定扩展阶段,弱胶结下(CSR<0.3),砾石边缘在弹性阶段产生孤立的剪切裂纹,并且在稳定扩展阶段连接形成剪切裂缝网络;强胶结下(CSR>0.3),砾石边缘在弹性阶段几乎不产生裂纹,而在裂纹稳定扩展阶段仅仅产生零星的孤立拉伸裂纹;砾石和杂基之间变形不协调产生的附加应力是弱胶结下胶结面破裂的原因。这些结果表明弱胶结有利于形成复杂裂缝网络,为揭示砾岩储层裂缝扩展规律提供了力学基础。
, correspAuthors=程佳豪, authorNote=null, correspAuthorsNote=
程佳豪(1998—),男,陕西礼泉人,助理工程师,研究方向为石油工程岩石力学。
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全家正(1984—),男,黑龙江建三江人,硕士,高级工程师,研究方向为石油与天然气工程。
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全家正(1984—),男,黑龙江建三江人,硕士,高级工程师,研究方向为石油与天然气工程。
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全家正(1984—),男,黑龙江建三江人,硕士,高级工程师,研究方向为石油与天然气工程。
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| 组别 | 参数 | 砾石 | 杂基 | 胶结面 |
| 颗粒 | 最小粒径/mm | 0.3 | 0.3 | — |
| 粒径比 | 1.33 | 1.33 | — |
| 密度/(kg·m-3) | 2 875 | 2 500 | — |
| 摩擦系数 | 0.8 | 0.8 | 0.16 |
| 线性组 | 有效模量/GPa | 45.0 | 10.0 | 9.0 |
| 刚度比 | 2.0 | 4.0 | 0.4 |
| 黏结组 | 黏结有效模量/GPa | 45.0 | 10.0 | 9.0 |
| 黏结刚度比 | 2.0 | 4.0 | 0.4 |
| 法向黏结强度/MPa | 80.0 | 50.0 | 16.0 |
| 黏聚力/MPa | 80.0 | 50.0 | 16.0 |
| 内摩擦角/(°) | 35.0 | 35.0 | 35.0 |
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微观参数
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| 组别 | 参数 | 砾石 | 杂基 | 胶结面 |
| 颗粒 | 最小粒径/mm | 0.3 | 0.3 | — |
| 粒径比 | 1.33 | 1.33 | — |
| 密度/(kg·m-3) | 2 875 | 2 500 | — |
| 摩擦系数 | 0.8 | 0.8 | 0.16 |
| 线性组 | 有效模量/GPa | 45.0 | 10.0 | 9.0 |
| 刚度比 | 2.0 | 4.0 | 0.4 |
| 黏结组 | 黏结有效模量/GPa | 45.0 | 10.0 | 9.0 |
| 黏结刚度比 | 2.0 | 4.0 | 0.4 |
| 法向黏结强度/MPa | 80.0 | 50.0 | 16.0 |
| 黏聚力/MPa | 80.0 | 50.0 | 16.0 |
| 内摩擦角/(°) | 35.0 | 35.0 | 35.0 |
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| 结果 | 抗压强度/MPa | 弹性模量/GPa |
| 实验结果 | 60.5 | 18.27 |
| 数值结果 | 66.2 | 19.17 |
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实验与数值结果
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| 结果 | 抗压强度/MPa | 弹性模量/GPa |
| 实验结果 | 60.5 | 18.27 |
| 数值结果 | 66.2 | 19.17 |
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