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长庆油田洛河水层防腐固井水泥浆及配套工艺技术

闵江本,  刘小利,  万向臣

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文章导航 > 钻井液与完井液  > 2021 >  38(2): 231-236
闵江本, 刘小利, 万向臣. 长庆油田洛河水层防腐固井水泥浆及配套工艺技术[J]. 钻井液与完井液, 2021, 38(2): 231-236. doi: 10.3969/j.issn.1001-5620.2021.02.017
引用本文: 闵江本, 刘小利, 万向臣. 长庆油田洛河水层防腐固井水泥浆及配套工艺技术[J]. 钻井液与完井液, 2021, 38(2): 231-236. doi: 10.3969/j.issn.1001-5620.2021.02.017
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MIN Jiangben, LIU Xiaoli, WAN Xiangchen. Corrosion Inhibitive Cement Slurry and Supporting Techniques for Cementing the Luohe Aquifer in Changqing Oilfield[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(2): 231-236. doi: 10.3969/j.issn.1001-5620.2021.02.017
Citation: MIN Jiangben, LIU Xiaoli, WAN Xiangchen. Corrosion Inhibitive Cement Slurry and Supporting Techniques for Cementing the Luohe Aquifer in Changqing Oilfield[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(2): 231-236. doi: 10.3969/j.issn.1001-5620.2021.02.017
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长庆油田洛河水层防腐固井水泥浆及配套工艺技术

doi: 10.3969/j.issn.1001-5620.2021.02.017

  • 1. 川庆钻探工程有限公司钻采工程技术研究院, 西安 710018;

  • 2. 低渗透油气田勘探开发国家工程实验室, 西安 710018

详细信息
    作者简介:

    闵江本,工程师,硕士,1988年生,毕业于长江大学油气井工程专业,现在从事固井工艺及水泥浆技术研究工作。电话15829060900;E-mail:minjb_gcy@cnpc.com.cn

  • 中图分类号: TE256.6

Corrosion Inhibitive Cement Slurry and Supporting Techniques for Cementing the Luohe Aquifer in Changqing Oilfield

  • 1. CCDC Drilling Engineering Technology Research Institute Xi'an, Shaanxi 710018;

  • 2. National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi'an, Shaanxi 710018

    摘要
  • 摘要: 长庆油田洛河水层固井水泥环腐蚀后引起水泥环渗透率升高，造成洛河水层固井套管腐蚀严重，套管腐蚀穿孔导致油井含水率上升，注水井水驱动用程度低，注采井网失调。为此，在常规固井水泥基础上，加入环氧树脂乳液非渗透剂及由阻锈材料和抑菌材料组合而成的缓蚀剂，减少固井水泥的腐蚀性和渗透率，降低套管腐蚀。固井水泥样品渗透率实验表明，在低密度水泥中加入10%非渗透剂和2%缓蚀剂，水泥石样品渗透率从0.075 mD降低到0.021 mD。在常规密度水泥中加入10%非渗透剂和2%缓蚀剂，水泥石样品渗透率从0.041 mD降低到0.0009 mD。水泥石抗腐蚀性能评价实验表明，在水泥中加入10%非渗透剂和2%缓蚀剂，水泥样品抗腐蚀性能提升6倍。同时水泥样品稠化时间和抗压强度与常规水泥相比保持不变。优选配套防腐工具工艺措施，并通过防腐水泥浆现场应用，总结出了一套防腐固井工艺技术，为长庆油田洛河水层防腐提供了有力的技术支撑。

     

    Abstract: Corrosion of the cement sheath sealing off the Luohe aquifer has caused the permeability of the cement sheath to increase, resulting in severe corrosion of the casing string in the aquifer section. Corrosion boring in the casing string has resulted in problems such as increase in the water cut of the produced fluid, low utilization of water flooding from water injectors and maladjustment of the injection and production well pattern. To solve the corrosion problem, an epoxy emulsion nonpenetrating agent and a corrosion inhibitor formulated with an anti-rust agent and a bacteria inhibitive agent, were mixed with conventional oil well cement. In this way the corrosivity and permeability of the cement slurry can be reduced, and hence corrosion to the casing string be mitigated. It was found in testing the permeability of the cement slurry samples that when a low-density cement slurry was treated with 10% nonpenetrating agent and 2% corrosion inhibitor, the permeability of the set cement was reduced from 0.075 mD to 0.021 mD. When a cement slurry of normal density was treated with 10% nonpenetrating agent and 2% corrosion inhibitor, the permeability of the set cement was reduced from 0.041 mD to 0.0009 mD. Experiment on the corrosion resistance of the set cement showed that when a cement slurry was treated with 10% nonpenetrating agent and 2% corrosion inhibitor, the corrosion resistance of the set cement was increased by a factor of 6, meanwhile, compared with the untreated conventional cement, the thickening time of the treated cement slurry and the compressive strength of the treated set cement were kept unchanged. A set of optimized operating tools and measures were used with the treated cement slurry in oil well cementing operation. The cement slurry and the supporting techniques have provided a powerful means of dealing with corrosion inhibition for the Luohe aquafer.

     

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  • 收稿日期:  2020-11-20

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