水侵压力对调整井固井二界面性能的影响
|
摘要
针对老区调整井地层压力系统紊乱、地层水容易在候凝过程中侵入环空、进而影响固井二界面处水泥浆凝结的问题。通过固井水泥浆水侵模拟评价装置,结合多功能材料表面性能试验机、扫描电镜等分析手段,研究了水侵对固井二界面性能的影响及其作用机理。结果表明:水侵导致二界面处水泥浆的稠化时间延长、滤失量增大,加剧水侵对界面处水泥浆的破坏,严重影响二界面的封固质量。同时,界面水泥浆被水侵入后凝结形成的水泥石不仅导致弹性模量大幅降低,而且疏松多孔,从而导致二界面剪切胶结强度降低和层间封隔性能变差。
Cementing operation of adjustment wells exists many challenges,including complex formation pressure system and water. These problems are easy to cause the formation water migrate into the cement slurry during waiting on cement setting,decrease the bonding quality of second interface between cement stone and formation. Established a water migration device,and combined the property testing machines,scanning electron microscope( SEM),the effect of the water migration on the bonding quality of second interface was investigated. Experimental results show that water migration will change the properties of the cement slurry that is located the second interface,the thickening time and the fluid-loss content are increased,which will severely destroy the bonding quality of second interface. In addition,once water migrates into the cement slurry,the mechanical properties of the hardened cement stones will be decreased and the porosity of the cement stones is markedly increased,which will decrease the shear stress of interface between cement stone and rock and the zonal isolation of the cement stone.
Cementing operation of adjustment wells exists many challenges,including complex formation pressure system and water. These problems are easy to cause the formation water migrate into the cement slurry during waiting on cement setting,decrease the bonding quality of second interface between cement stone and formation. Established a water migration device,and combined the property testing machines,scanning electron microscope( SEM),the effect of the water migration on the bonding quality of second interface was investigated. Experimental results show that water migration will change the properties of the cement slurry that is located the second interface,the thickening time and the fluid-loss content are increased,which will severely destroy the bonding quality of second interface. In addition,once water migrates into the cement slurry,the mechanical properties of the hardened cement stones will be decreased and the porosity of the cement stones is markedly increased,which will decrease the shear stress of interface between cement stone and rock and the zonal isolation of the cement stone.
引文
[1]杨学德,何启贤,刘畅,等.注水井对调整井钻井的影响及对策[J].石油钻探技术,2001,29(2):16-18.
[2]陈晓楼,李扬,莫继春,等.注水开发中水渗流对固井质量的影响[J].钻井液与完井液,1999,16(5):21-24.
[3]沈志宏,杜辉强.薄油层薄隔层活跃水层调整井固井技术[J].石油钻采工艺,2001,23(2):25-26.
[4]舒秋贵.注水区块调整井固井水侵机理研究[J].西部探矿工程,2004,16(2):72-74.
[5]邱燮和.超浅调整井固井防水窜技术[J].钻井液与完井液,2013,30(4):84-87.
[6]杨秀天,王克诚,张立,等.调整井固井弱界面问题探讨[J].钻井液与完井液,2010(5):55-57.
[7]张友华.滨南37区块固井技术研究与应用[J].中国科技博览,2015(36):199.
[8]钟福海,宋元洪,费中明,等.缅甸D区块窄密度窗口防漏防窜固井技术探讨[J].钻井液与完井液,2010,27(5):61-64.
[9]周英操,杨智光,肖志兴,等.大庆油田调整井固井技术及应用[J].大庆石油学院学报,2004(6):11-13.
[10]王东明,张华,王贵富,等.大港油田调整井固井技术的研究与应用[J].长江大学学报(自然科学版),2015(20):47-50.
[11]张兴国,郭昭学,许树谦,等.对水泥浆有效浆柱压力降至水柱压力时间的新认识[J].天然气工业,2004,24(7):68-70.
[12]肖志兴,卢丽文,梁洪权.地层流体影响水泥环胶结质量的机理分析[J].钻采工艺,1999(2):4-8.
[13]姚晓.调整井固井水窜的根源分析及现行防窜技术评析[J].钻井液与完井液,2001,18(5):13-16.
[14]顾军,高德利,石凤歧,等.论固井二界面封固系统及其重要性[J].钻井液与完井液,2005,22(2):7-10.
[15]顾军,高兴原,刘洪.油气井固井二界面封固系统及其破坏模型[J].天然气工业,2006,26(7):74-76.
[16]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会. GB/T 19139-2012油井水泥石试验方法[S].北京:中国标准出版社,2012.
[17]张兴国,刘崇建,杨远光,等.水泥浆体系稳定性对水泥浆失重的重要影响[J].西南石油学院学报,2004,26(3):68-70.
[18]张兴国,杜成良,李跃明,等.环空窜流的类型及成因[J].西部探矿工程,2006,18(10):113-114.
[19]刘崇建.油气井注水泥理论与应用[M].北京:石油工业出版社,2001:163-168.
[2]陈晓楼,李扬,莫继春,等.注水开发中水渗流对固井质量的影响[J].钻井液与完井液,1999,16(5):21-24.
[3]沈志宏,杜辉强.薄油层薄隔层活跃水层调整井固井技术[J].石油钻采工艺,2001,23(2):25-26.
[4]舒秋贵.注水区块调整井固井水侵机理研究[J].西部探矿工程,2004,16(2):72-74.
[5]邱燮和.超浅调整井固井防水窜技术[J].钻井液与完井液,2013,30(4):84-87.
[6]杨秀天,王克诚,张立,等.调整井固井弱界面问题探讨[J].钻井液与完井液,2010(5):55-57.
[7]张友华.滨南37区块固井技术研究与应用[J].中国科技博览,2015(36):199.
[8]钟福海,宋元洪,费中明,等.缅甸D区块窄密度窗口防漏防窜固井技术探讨[J].钻井液与完井液,2010,27(5):61-64.
[9]周英操,杨智光,肖志兴,等.大庆油田调整井固井技术及应用[J].大庆石油学院学报,2004(6):11-13.
[10]王东明,张华,王贵富,等.大港油田调整井固井技术的研究与应用[J].长江大学学报(自然科学版),2015(20):47-50.
[11]张兴国,郭昭学,许树谦,等.对水泥浆有效浆柱压力降至水柱压力时间的新认识[J].天然气工业,2004,24(7):68-70.
[12]肖志兴,卢丽文,梁洪权.地层流体影响水泥环胶结质量的机理分析[J].钻采工艺,1999(2):4-8.
[13]姚晓.调整井固井水窜的根源分析及现行防窜技术评析[J].钻井液与完井液,2001,18(5):13-16.
[14]顾军,高德利,石凤歧,等.论固井二界面封固系统及其重要性[J].钻井液与完井液,2005,22(2):7-10.
[15]顾军,高兴原,刘洪.油气井固井二界面封固系统及其破坏模型[J].天然气工业,2006,26(7):74-76.
[16]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会. GB/T 19139-2012油井水泥石试验方法[S].北京:中国标准出版社,2012.
[17]张兴国,刘崇建,杨远光,等.水泥浆体系稳定性对水泥浆失重的重要影响[J].西南石油学院学报,2004,26(3):68-70.
[18]张兴国,杜成良,李跃明,等.环空窜流的类型及成因[J].西部探矿工程,2006,18(10):113-114.
[19]刘崇建.油气井注水泥理论与应用[M].北京:石油工业出版社,2001:163-168.