本文主要研究内容
作者李长圣（2019）在《基于离散元的褶皱冲断带构造变形定量分析与模拟》一文中研究指出：离散元数值模拟作为构造变形研究的新方法,可以定量的观测分析模型内应力、应变的演化过程,有助于揭示褶皱冲断带的变形特征与变形机制,分析应力应变分布对油气储层物性的影响,具有重要的理论意义及实用价值。本文在文献调研的基础上,结合野外地质调查、地震剖面解析和构造物理模拟试验,基于离散元数值模拟技术,对褶皱冲断带构造变形特征及其变形演化机制和控制因素进行综合分析,取得了如下成果:1)采用结构体数组构建离散元的基本数据结构,改进基于网格法的邻居搜索算法,加快邻居搜索与接触判断的速度,重组邻居搜索与接触判断和接触力的更新模块,实现了无锁、高效的并行计算。嵌入线弹性和Hertz-Mindlin接触力学模型,开发适用于构造模拟的易扩展、高性能的离散元程序VBOX,并给出了离散元程序测试流程。2)提出等效参数与等效模型的概念,通过休止角试验和双轴试验标定反映石英砂宏观力学特性的颗粒的细观参数,构建一个典型的物理模拟和离散元数值模拟试验,提出基于网格的挤压楔体定量方法,定量(如坡角、断层倾角等)对比了两种方法在构造变形研究中的差异与相似点。3)通过系统的离散元数值模拟试验给出颗粒细观参数与岩石宏观参数的对应表,研究岩层粘聚力和内摩擦角、滑脱层强度和厚度对褶皱冲断构造形成与演化的控制作用,定量分析了褶皱冲断构造变形特征与变形机制,为复杂褶皱冲断构造地质理论的完善提供了定量依据。岩层粘聚力较低时,内部应变分散,裂隙分布较为分散;岩层粘聚力较强时,应变集中,断层断距较大,单个断层位移量大,楔体内部可能出现明显的反冲断层。也就是说,粘聚力弱的岩层,应力集中不明显,挤压楔体内部裂隙发育松散、均匀,具有连通孔隙,利于油气在其中储存和渗滤。而粘聚力强的岩层中裂隙发育集中,成带状,可以作为优势的油气运移通道。滑脱层的强度对褶皱冲断带构造形态影响很大,高摩擦滑脱层模型中,主要构造形态为前展式逆冲叠瓦构造;在低摩擦滑脱模型中,正向和反向逆冲断层间隔出现,形成冲起构造;褶皱冲断带盖层岩石强度对褶皱冲断构造影响较小,整体构造演化主要受基底滑脱层强度影响。并且,滑脱层厚度对构造变形样式影响较弱。4)以库车坳陷新生代褶皱冲断带为切入点,标定了岩盐宏观参数所对应的颗粒的细观参数。通过数值模拟证实了同构造沉积对变形的分布具有重要的控制作用,认为秋里塔格盐丘形成演化的主要控制因素之一是同构造沉积作用。盐岩使得库车坳陷西段构造具“垂向分层”特点,盐下构造以紧密排布的逆冲断层为主,盐上构造以宽缓褶皱为主。同时,通过数值模拟了揭示初始盐盆宽度可能是影响库车坳陷西段构造沿走向差异演化的主要控制因素。初始盐盆宽度和盐层厚度差异使得库车坳陷构造变形具“横向分段”特征。盐岩使得地层中应力有明显的分层性,分成盐上、盐层和盐下三层,盐层中应力最小,盐下应力最大。盐岩流动具有一定的指向性,同构造沉积使得盐岩表现明显的顺层流动特点,总体流动趋势与挤压方向相同。
Abstract
li san yuan shu zhi mo ni zuo wei gou zao bian xing yan jiu de xin fang fa ,ke yi ding liang de guan ce fen xi mo xing nei ying li 、ying bian de yan hua guo cheng ,you zhu yu jie shi zhe zhou chong duan dai de bian xing te zheng yu bian xing ji zhi ,fen xi ying li ying bian fen bu dui you qi chu ceng wu xing de ying xiang ,ju you chong yao de li lun yi yi ji shi yong jia zhi 。ben wen zai wen suo diao yan de ji chu shang ,jie ge ye wai de zhi diao cha 、de zhen pou mian jie xi he gou zao wu li mo ni shi yan ,ji yu li san yuan shu zhi mo ni ji shu ,dui zhe zhou chong duan dai gou zao bian xing te zheng ji ji bian xing yan hua ji zhi he kong zhi yin su jin hang zeng ge fen xi ,qu de le ru xia cheng guo :1)cai yong jie gou ti shu zu gou jian li san yuan de ji ben shu ju jie gou ,gai jin ji yu wang ge fa de lin ju sou suo suan fa ,jia kuai lin ju sou suo yu jie chu pan duan de su du ,chong zu lin ju sou suo yu jie chu pan duan he jie chu li de geng xin mo kuai ,shi xian le mo suo 、gao xiao de bing hang ji suan 。qian ru xian dan xing he Hertz-Mindlinjie chu li xue mo xing ,kai fa kuo yong yu gou zao mo ni de yi kuo zhan 、gao xing neng de li san yuan cheng xu VBOX,bing gei chu le li san yuan cheng xu ce shi liu cheng 。2)di chu deng xiao can shu yu deng xiao mo xing de gai nian ,tong guo xiu zhi jiao shi yan he shuang zhou shi yan biao ding fan ying dan ying sha hong guan li xue te xing de ke li de xi guan can shu ,gou jian yi ge dian xing de wu li mo ni he li san yuan shu zhi mo ni shi yan ,di chu ji yu wang ge de ji ya xie ti ding liang fang fa ,ding liang (ru po jiao 、duan ceng qing jiao deng )dui bi le liang chong fang fa zai gou zao bian xing yan jiu zhong de cha yi yu xiang shi dian 。3)tong guo ji tong de li san yuan shu zhi mo ni shi yan gei chu ke li xi guan can shu yu yan dan hong guan can shu de dui ying biao ,yan jiu yan ceng nian ju li he nei ma ca jiao 、hua tuo ceng jiang du he hou du dui zhe zhou chong duan gou zao xing cheng yu yan hua de kong zhi zuo yong ,ding liang fen xi le zhe zhou chong duan gou zao bian xing te zheng yu bian xing ji zhi ,wei fu za zhe zhou chong duan gou zao de zhi li lun de wan shan di gong le ding liang yi ju 。yan ceng nian ju li jiao di shi ,nei bu ying bian fen san ,lie xi fen bu jiao wei fen san ;yan ceng nian ju li jiao jiang shi ,ying bian ji zhong ,duan ceng duan ju jiao da ,chan ge duan ceng wei yi liang da ,xie ti nei bu ke neng chu xian ming xian de fan chong duan ceng 。ye jiu shi shui ,nian ju li ruo de yan ceng ,ying li ji zhong bu ming xian ,ji ya xie ti nei bu lie xi fa yo song san 、jun yun ,ju you lian tong kong xi ,li yu you qi zai ji zhong chu cun he shen lv 。er nian ju li jiang de yan ceng zhong lie xi fa yo ji zhong ,cheng dai zhuang ,ke yi zuo wei you shi de you qi yun yi tong dao 。hua tuo ceng de jiang du dui zhe zhou chong duan dai gou zao xing tai ying xiang hen da ,gao ma ca hua tuo ceng mo xing zhong ,zhu yao gou zao xing tai wei qian zhan shi ni chong die wa gou zao ;zai di ma ca hua tuo mo xing zhong ,zheng xiang he fan xiang ni chong duan ceng jian ge chu xian ,xing cheng chong qi gou zao ;zhe zhou chong duan dai gai ceng yan dan jiang du dui zhe zhou chong duan gou zao ying xiang jiao xiao ,zheng ti gou zao yan hua zhu yao shou ji de hua tuo ceng jiang du ying xiang 。bing ju ,hua tuo ceng hou du dui gou zao bian xing yang shi ying xiang jiao ruo 。4)yi ku che ao xian xin sheng dai zhe zhou chong duan dai wei qie ru dian ,biao ding le yan yan hong guan can shu suo dui ying de ke li de xi guan can shu 。tong guo shu zhi mo ni zheng shi le tong gou zao chen ji dui bian xing de fen bu ju you chong yao de kong zhi zuo yong ,ren wei qiu li da ge yan qiu xing cheng yan hua de zhu yao kong zhi yin su zhi yi shi tong gou zao chen ji zuo yong 。yan yan shi de ku che ao xian xi duan gou zao ju “chui xiang fen ceng ”te dian ,yan xia gou zao yi jin mi pai bu de ni chong duan ceng wei zhu ,yan shang gou zao yi kuan huan zhe zhou wei zhu 。tong shi ,tong guo shu zhi mo ni le jie shi chu shi yan pen kuan du ke neng shi ying xiang ku che ao xian xi duan gou zao yan zou xiang cha yi yan hua de zhu yao kong zhi yin su 。chu shi yan pen kuan du he yan ceng hou du cha yi shi de ku che ao xian gou zao bian xing ju “heng xiang fen duan ”te zheng 。yan yan shi de de ceng zhong ying li you ming xian de fen ceng xing ,fen cheng yan shang 、yan ceng he yan xia san ceng ,yan ceng zhong ying li zui xiao ,yan xia ying li zui da 。yan yan liu dong ju you yi ding de zhi xiang xing ,tong gou zao chen ji shi de yan yan biao xian ming xian de shun ceng liu dong te dian ,zong ti liu dong qu shi yu ji ya fang xiang xiang tong 。
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论文作者分别是来自南京大学的李长圣，发表于刊物南京大学2019-05-27论文，是一篇关于离散元论文,并行计算论文,应力应变论文,定量论文,挤压楔体论文,盐构造论文,南京大学2019-05-27论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自南京大学2019-05-27论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：离散元论文; 并行计算论文; 应力应变论文; 定量论文; 挤压楔体论文; 盐构造论文; 南京大学2019-05-27论文;