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Study on Casing Damage in Horizontal Wells of Steam Injection

Author: HouNaiHe
Tutor: ZhangQuanShengï¼›WangHanXiang
School: China University of Petroleum
Course: Mechanical Engineering
Keywords: Horizontal wells Thermal recovery Casing damage Thermal stress Finite Element
CLC: TE931.2
Type: Master's thesis
Year: 2011
Downloads: 110
Quote: 0
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Abstract


Note steam than higher oil production and economic benefits relative to the vertical well steam injection horizontal wells have been widely used in heavy oil thermal recovery . However, due to the complexity of wellbore trajectory of horizontal wells , coupled with the impact of the high-temperature steam injection process , making the horizontal well steam injection process produces a large number of casing damage phenomena , carried out a serious impact on oil production . Therefore to ascertain the reasons for casing damage , and come up with effective prevention and control measures , to choose has important implications on the injection of steam horizontal well completion design and mining . Firstly, according to the the common horizontal well completion string structure , combined with the wellbore trajectory to establish the process down into friction mechanical model calculation down into the completion string string suffered frictional resistance and axial force , and checking their safety. Second , the theoretical analysis of horizontal well injection steam wellbore heat transfer characteristics , with the finite element analysis software ANSYS, numerical simulation of steam injection phase of the vertical section of the wellbore temperature field studies insulated pipes depending on the thermal conductivity and thermal sealing packer failure the impact of the situation on the sleeve - the formation temperature field , the same level segment , calculate the horizontal segment of the temperature field in the period of time under different steam injection , steam injection time of the formation temperature field . Finally, obtained in the vertical section and the horizontal section in order to calculate the formation temperature field based analysis of the stress of each segment string , the completion string of the vertical segment sleeve by thermal stress and the horizontal segment in the general case , reservoir case of landslides and well trajectory depression suffered stress and deformation of the main casing damage caused . According to the above theoretical analysis and oilfield actual proposed to prevent horizontal wells Note the steam casing damage measures and protection measures , to play a guiding role in the on-site construction .

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CLC: > Industrial Technology > Oil and gas industry > Oil machinery and equipment and automation > Oil and gas production machinery and equipment > Wellhead and downhole equipment > Downhole equipment
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