高温高压对微波破岩效果的影响模拟研究
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摘要
为了将微波破岩技术应用于石油钻井,研究了钻井过程中高温高压对微波破岩效果的影响。根据岩石不同矿物成分的微波吸收特性,建立了某岩石的二维平面模型,模拟分析了温度、围压及二者共同作用对微波破岩效果的影响。研究发现:在微波照射参数相同的情况下,随着井下温度升高,岩石发生塑性变形的时间缩短;随着井下围压增大,岩石塑性变形时间延长;温度和围压共同作用时,围压的影响占主导作用,而温度的影响主要在高温条件下体现。研究结果表明,围压不利于微波破岩,且影响较大;温度对微波破岩有一定促进作用,但只在高温条件下作用明显。因此,应用微波进行破岩时要综合考虑温度和围压变化对破岩效果的影响,及时调整微波参数,使破岩更加经济高效。
In order to apply a microwave rock breaking technology in petroleum drilling, the influences of HTHP on the microwave rock breaking result during drilling were studied. According to the microwave absorption characteristics of rock components, a two-dimensional plane model of a rock was established, and the influences of temperature, confining pressure and the combination of both the two on microwave rock breaking result were simulated. The study result found that under the same microwave irradiation parameters, the plastic deformation time of rock shortened with the increase of downhole temperature, and the plastic deformation time of rock increased with the increase of downhole confining pressure. Considering the combined results of both temperature and confining pressure,the influence of confining pressure was dominant, while the effect of temperature mainly exerted under high temperature conditions. The results showed that the confining pressure did not result in microwave rock breaking, and the influence was obvious; temperature had a certain promotion effect on microwave rock breaking, but such an effect was evident only under high temperature conditions. Therefore, when applying microwave in rock breaking, it is necessary to comprehensively consider the influences of temperature and confining pressure on rock breaking results,and to adjust the microwave parameters in time to make the rock breaking more economical and efficient.
In order to apply a microwave rock breaking technology in petroleum drilling, the influences of HTHP on the microwave rock breaking result during drilling were studied. According to the microwave absorption characteristics of rock components, a two-dimensional plane model of a rock was established, and the influences of temperature, confining pressure and the combination of both the two on microwave rock breaking result were simulated. The study result found that under the same microwave irradiation parameters, the plastic deformation time of rock shortened with the increase of downhole temperature, and the plastic deformation time of rock increased with the increase of downhole confining pressure. Considering the combined results of both temperature and confining pressure,the influence of confining pressure was dominant, while the effect of temperature mainly exerted under high temperature conditions. The results showed that the confining pressure did not result in microwave rock breaking, and the influence was obvious; temperature had a certain promotion effect on microwave rock breaking, but such an effect was evident only under high temperature conditions. Therefore, when applying microwave in rock breaking, it is necessary to comprehensively consider the influences of temperature and confining pressure on rock breaking results,and to adjust the microwave parameters in time to make the rock breaking more economical and efficient.
引文
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[16]唐阳,徐国宾,孙丽莹,等.不同间断比尺下微波诱发岩石损伤的离散元模拟研究[J].水力发电学报,2016,35(7):15-22.TANG Yang,XU Guobin,SUN Liying,et al.Discrete element modeling of microwave-induced rock damage at different discontinuity scales[J].Journal of Hydroelectric Engineering,2016,35(7):15-22.
[17]杨晓庆,黄卡玛,黄镇钢,等.微波加热模拟中的关键问题讨论[J].压电与声光,2008,30(2):105-107.YANG Xiaoqing,HUANG Kama,HUANG Zhengang,et al.Study on the key problems of numeric simulation of microwave heating[J].Piezoelectectrics&Acoustooptics,2008,30(2):105-107.
[18]秦立科,戴俊.微波照射下矿物颗粒温度分布及影响因素分析[J].矿冶工程,2015,35(3):96-98.QIN Like,DAI Jun.Temperature distribution and influential factors for ore particles under microwave irradiation[J].Mining and Metallurgical Engineering,2015,35(3):96-98.
[2]张强.岩石破碎技术发展趋势[J].有色矿山,1996(6):20-22.ZHANG Qiang.Rock-breaking technology trends[J].China Mine Engineering,1996(6):20-22.
[3]鲍挺,黄宁.岩石破碎技术研究与发展前景[J].安徽建筑,2010(6):110,116.BAO Ting,HUANG Ning.The research and development prospects of rock-breaking technology[J].Anhui Architecture,2010(6):110,116.
[4]VIKTOROV S D,KUZNETSO A P.Explosive breaking of rock:a retrospective and a possible alternative[J].Journal of Mining Science,1998,34(1):43-49.
[5]李文成,杜雪鹏.微波辅助破岩新技术在非煤矿的应用[J].铜业工程,2010(4):1-4.LI Wencheng,DU Xuepeng.Application of microwave-assisted rock breaking in metal mines[J].Coffer Engineering,2010(4):1-4.
[6]郭先敏.毫米波钻井技术[J].石油钻探技术,2014,42(3):55-60.GUO Xianmin.Millimeter wave drilling technology[J].Petroleum Drilling Techniques,2014,42(3):55-60.
[7]KINGMAN S W.Recent developments in microwave processing of minerals[J].International Materials Reviews,2006,51(1):1-12.
[8]LOVáS M,KOVá?OVáM,DIMITRAKIS G,et al.Modeling of microwave heating of andesite and minerals[J].International Journal of Heat and Mass Transfer,2010,53(17/18):3387-3393.
[9]HASSANI F,NEKOOVAGHT P M,GHARIB N.The influence of microwave irradiation on rocks for microwave-assisted underground excavation[J].Journal of Rock Mechanics and Geotechnical Engineering,2016,8(1):1-15.
[10]AZAR M,KESHAVAN M,COOPER I M.Energy-emitting bits and cutting elements:WO2017/151353[P/OL].2017-09-08[2018-08-12].https://patentscope.wipo.int/search/zh/detail.jsf?docId=WO2017151353&redirecedID=true
[11]戴俊,孟振,吴丙权.微波照射对岩石强度的影响研究[J].有色金属(选矿部分),2014(3):54-57.DAI Jun,MENG Zhen,WU Bingquan.Study on impact of rock strength by microwave irradiation[J].Monferrous Metals(Mineral Processing Section),2014(3):54-57.
[12]卢高明,李元辉,HASSANI Ferri,et al.微波辅助机械破岩试验和理论研究进展[J].岩土工程学报,2016,38(8):1497-1506.LU Gaoming,LI Yuanhui,HASSANI F,et al.Review of theoretical and experimental studies on mechanical rock fragmentation using microwave-assisted approach[J].Chinese Journal of Geotechnical Engineering,2016,38(8):1497-1506.
[13]戴俊,秦立科.微波照射下岩石损伤细观模拟分析[J].西安科技大学学报,2014,34(6):652-655.DAI Jun,QIN Like.Meso-simulation of rock damage under microwave irradiation[J].Journal of Xi’an University of Science and Technology,2014,34(6):652-655.
[14]黄孟阳,彭金辉,雷鹰,等.微波场中钛精矿的温升行为及吸波特性[J].四川大学学报(工程科学版),2007,39(2):111-115.HUANG Mengyang,PENG Jinhui,LEI Ying,et al.The temperature rise behavior and microwave-absorbing characteristics of ilmenite concentrate in microwave field[J].Journal of Sichuan University(Engineering Science Edition),2007,39(2):111-115.
[15]陈超,刘建.数值分析方法在微波辅助破岩中的应用[J].华北理工大学学报(自然科学版),2017,39(4):28-33.CHEN Chao,LIU Jian.Application of numerical analysis method in microwave assisted rock breaking[J].Journal of North China University of Science and Technology(Natural Science Edition),2017,39(4):28-33.
[16]唐阳,徐国宾,孙丽莹,等.不同间断比尺下微波诱发岩石损伤的离散元模拟研究[J].水力发电学报,2016,35(7):15-22.TANG Yang,XU Guobin,SUN Liying,et al.Discrete element modeling of microwave-induced rock damage at different discontinuity scales[J].Journal of Hydroelectric Engineering,2016,35(7):15-22.
[17]杨晓庆,黄卡玛,黄镇钢,等.微波加热模拟中的关键问题讨论[J].压电与声光,2008,30(2):105-107.YANG Xiaoqing,HUANG Kama,HUANG Zhengang,et al.Study on the key problems of numeric simulation of microwave heating[J].Piezoelectectrics&Acoustooptics,2008,30(2):105-107.
[18]秦立科,戴俊.微波照射下矿物颗粒温度分布及影响因素分析[J].矿冶工程,2015,35(3):96-98.QIN Like,DAI Jun.Temperature distribution and influential factors for ore particles under microwave irradiation[J].Mining and Metallurgical Engineering,2015,35(3):96-98.