理工类毕业论文(论文)范例..doc

辽宁石油化工大学毕业设计(论文)
Graduation Project (Thesis) for Undergraduate of LSHU
题目
TITLE
学院
School
专业班级
Major&Class
姓名
Name
指导教师
Supervisor
20 年月日
论文独创性声明
本人所呈交的论文,是在指导教师指导下,独立进行研究和开发工作所取得的成果。除文中已特别加以注明引用的内容外,论文中不包含任何其他个人或集体已经发表或撰写过的研究成果。对本文的工作做出重要贡献的个人和集体,均已在文中以明确方式标明并致谢。本声明的法律结果由本人承担。
特此声明。
论文作者(签名):
年月日
摘要
针对稠油热采过程中注入大量高温蒸汽而造成井筒部分热损失难以控制的问题,从热工角度初步分析了高温蒸汽在井筒部分的传热过程,建立了井筒及周围地层部分的二维、瞬态传热数学模型,根据所求得的温度场以及定量热损失经验公式,探讨了隔热油管视导热系数和蒸汽温度对单位长度井筒热损失的影响。研究表明:井筒单位长度热损失随着隔热油管视导热系数和蒸汽温度的增加而增加,且隔热油管视导热系数对井筒单位长度热损失的影响更大。
高温高压蒸汽流经井筒段后进入油层段,蒸汽通过射孔进入油层,并与油层进行传质传热,从而形成油层热影响区域。本文利用有限元分析软件ANSYS,对辽河某热采井建立了井筒、地层和油层部分的二维、非稳态数学模型,并模拟分析了油层和周围地层温度场,在此基础之上探讨了注汽时间对油层热影响区域的影响。研究表明:油层热影响区域先随着注汽时间的增大而增大,而后基本不变,且注汽时间在3~5天最佳。
关键词:视导热系数;注汽温度;热损失;热影响区域;ANSYS
Abstract
For the purpose of reducing the heat loss in the mineshaft during the steam injection process, a two dimension, unsteady state heat transfer model of the mineshaft and surrounding soil was established and then the temperature field was obtained. Base the Heat loss experience formula, the apparent heat conductivity and steam temperature to heat loss per length of the mineshaft influence were discussed. The results shown that the heat loss per length of the mineshaft increased with the apparent heat conductivity and steam temperature increase, furthermore, the apparent heat conductivity affected larger than that of steam temperature.
High temperature and high pressure steam flows through the wellbore segment backward, such as the reservoir section, the steam through the perforation into the reservoir, and reservoir mass and heat transfer, and thus the formation of a reservoir heat-affected zone is build. Using the finite element analysis software ANSYS, a thermal recovery wellbore, formation and reservoir part of the two non-steady-state mathematical model of Liaohe was build, and simulation Analysis of the temperature field of the reservoir and surrounding strata was made, and the relationgship between the time of steam