基于海上有杆采油的LD27-2 WHPB平台再设计研究
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摘要
为了推行适用于海上稠油开采的有杆采油技术,提出了海上采油平台再设计的建议。运用ANSYS技术,建立LD27-2 WHPB平台的有限元模型。在设计液压抽油机载荷和风浪流载荷作用时,计算平台主腿、中层甲板等受力构件的刚度和强度。计算结果表明:(1)导管架的安全系数在4以上,能满足安全要求,抽油机对平台主腿的影响可忽略不计。(2)当井口内部梁尺寸不小于500mm时,无需进行加强;当井口内部梁尺寸小于500mm时,为了满足海上有杆采油的需要,需要进行加强操作,可通过增加斜撑或在梁上铺设钢板来增加刚度。
To push the application of the technology of oil recovery with rod pumping in offshore heavy oil mining, we put forward a redesign concept of an offshore oil platform. A finite element model of LD27-2 WHPB platform has been established by using ANSYS technology. Changes in stiffness and strength of the main legs and middle deck structural components are analyzed when adding the load of designed pumping units and the load of wave, current and wind. It is shown that safety coefficient is above 4, so that the security requirements of the platform can be satisfied. When the size of wellhead internal beam is more than 500 mm, strengthening is not needed, otherwise strengthening must be performed. The stiffness can be increased by adding steel brace or laying steel plates on the wellhead beam.
To push the application of the technology of oil recovery with rod pumping in offshore heavy oil mining, we put forward a redesign concept of an offshore oil platform. A finite element model of LD27-2 WHPB platform has been established by using ANSYS technology. Changes in stiffness and strength of the main legs and middle deck structural components are analyzed when adding the load of designed pumping units and the load of wave, current and wind. It is shown that safety coefficient is above 4, so that the security requirements of the platform can be satisfied. When the size of wellhead internal beam is more than 500 mm, strengthening is not needed, otherwise strengthening must be performed. The stiffness can be increased by adding steel brace or laying steel plates on the wellhead beam.
引文
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[2]周守为.海上稠油高效开发新模式研究及应用[J].西南石油大学学报,2007,29(5):1-4.
[3]李萍,刘志龙,邹剑,等.渤海旅大27-2油田蒸汽吞吐先导试验注采工程[J].石油学报,2016,37(2):242-247.
[4]韩雪银,付建民,刘玉杰,等.LD27-2油田稠油热采井固井技术难点与对策[J].石油钻采工艺,2015,37(6):31-35.
[5]薛鑫,綦耀光,余焱群,等.海洋平台液压抽油机的有限元建模与分析[J].石油机械,2016,44(12):65-69.
[6]梁丹,冯国智,等.海上稠油两种热采方式开发效果评价[J].石油钻采技术,2014,42(1):96-99.
[7]余焱群,常宗瑜,綦耀光,等.海上稠油热采井下安全装置的研究[J].东华大学学报,2016,42(4):527-531.
[8]YU Yanqun,CHANG Zongyu,QI Yaoguang,et al.Study of a new hydraulic pumping unit based on the offshore platform[J].Energy Science&Engineering,2016,4(5):352-360.
[9]薛鑫,綦耀光,余焱群,等.液压抽油机的适应性分析与应用现状综述[J].机床与液压,2016,44(10):151-154.
[10]石青松.ANSYS在LD27-2平台坐底稳定性分析中的应用[J].中国造船,2008,49(S2):447-452.
[11]陈荣.ANSYS在自升式平台结构强度分析中的应用[J].广东造船,2007(4):8-10.
[12]杨远.双井抽油机机架结构应力分析与结构优化[D].青岛:中国石油大学(华东),2011:9-13.
[13]林红,陈国明.考虑多失效模式老龄平台结构可靠性分析[J].中国石油大学学报(自然科学版),2010,34(4):107-112.
[14]杨凤军.渤海湾浅海海洋平台动力分析及优化设计[D].青岛:中国石油大学(华东),2011:16-19.
[15]杨光.深水单柱形平台水动力性能分析研究[D].大连:大连理工大学,2007:29-32.
[16]API 1993.Recommended practice for planning,designing and constructing fixed offshore platforms-load and resistance factor design[S].21th Edition.API Production Department.
[17]YUE Jixiang,QI Yaoguang,XIAO Wensheng,et al.Study on the general layout of semi-submersible offshore drilling platforms based on process flow[J].Journal of Marine Science and Application,2009,2(8):117-122.
[18]张则青,高瑞力,王东锋,等.平台组块甲板片建造技术研究[J].中国造船,2013,54(S2):41-44.
[19]岳吉祥,綦耀光.基于人机工程学的半潜式平台总体布置设计研究[J].中国海洋平台,2008,23(2):8-12.