润滑与密封
潤滑與密封
윤활여밀봉
LUBRICATION ENGINEERING
2014年
3期
14-17,47
,共5页
低渗油藏%水平井%分段压裂%封隔器%密封结构
低滲油藏%水平井%分段壓裂%封隔器%密封結構
저삼유장%수평정%분단압렬%봉격기%밀봉결구
low permeability reservoir%open well%staged fracturing%packer%sealing structure
低渗油藏水平井分段压裂压缩式封隔器，由于处于高温、高压、复杂深部地层环境，胶筒组常出现坐封力低和坐封提前失效、胶筒与中心管间产生渗漏等问题，导致封隔器密封失效。提出一种十字锥形隔环与槽形胶筒组组合的新密封结构，基于ABAQUS软件分析其胶筒组沿井壁、中心管轴向接触应力，沿井壁的Mises应力分布，以及硬度、坐封力对其接触应力的影响。研究表明，新型密封结构的胶筒组与井壁、中心管接触更加充分，各胶筒接触应力显著提高且分布均匀，保证了封隔器的密封可靠性；胶筒组与井壁间的Mises应力降低，避免了胶筒组被撕裂；随着硬度、坐封力的增加，胶筒组与井壁间的接触应力增加。
低滲油藏水平井分段壓裂壓縮式封隔器，由于處于高溫、高壓、複雜深部地層環境，膠筒組常齣現坐封力低和坐封提前失效、膠筒與中心管間產生滲漏等問題，導緻封隔器密封失效。提齣一種十字錐形隔環與槽形膠筒組組閤的新密封結構，基于ABAQUS軟件分析其膠筒組沿井壁、中心管軸嚮接觸應力，沿井壁的Mises應力分佈，以及硬度、坐封力對其接觸應力的影響。研究錶明，新型密封結構的膠筒組與井壁、中心管接觸更加充分，各膠筒接觸應力顯著提高且分佈均勻，保證瞭封隔器的密封可靠性；膠筒組與井壁間的Mises應力降低，避免瞭膠筒組被撕裂；隨著硬度、坐封力的增加，膠筒組與井壁間的接觸應力增加。
저삼유장수평정분단압렬압축식봉격기，유우처우고온、고압、복잡심부지층배경，효통조상출현좌봉력저화좌봉제전실효、효통여중심관간산생삼루등문제，도치봉격기밀봉실효。제출일충십자추형격배여조형효통조조합적신밀봉결구，기우ABAQUS연건분석기효통조연정벽、중심관축향접촉응력，연정벽적Mises응력분포，이급경도、좌봉력대기접촉응력적영향。연구표명，신형밀봉결구적효통조여정벽、중심관접촉경가충분，각효통접촉응력현저제고차분포균균，보증료봉격기적밀봉가고성；효통조여정벽간적Mises응력강저，피면료효통조피시렬；수착경도、좌봉력적증가，효통조여정벽간적접촉응력증가。
Due to working in an environment of high temperature and high pressure and complex stratum,the packer rubber of open well staged fracturing of low-permeability reservoir are usually appeared with low setting force and earlier failure of setting,and leakage between rubber and center pipe,which result in packer sealing failure.A new sealing struc-ture was proposed which consisted of cross spacer ring and groove rubbers.The stress distribution of the packer was ana-lyzed by ABAQUS,including rubbers' contact stress along the well wall and center pipe,rubbers' Mises stress along the borehole wall.The effects of material hardness and packer sealing force on the contact stress of sealing structure were in-vestigated.The results show that the new sealing structure of packer realizes the full contact of the rubbers with the bore-hole wall and center pipe.The contact stress of rubber is increased significantly and its distribution is more even,which en-sures the sealing reliability of the packer.The rubbers' Mises stress along the borehole wall is reduced,which avoids the rubber torn.The contact stress between the rubbers and the borehole wall is increased with the material hardness and pack-er sealing force.
