| 摘要: |
| 研究了 H2s对常规冻胶型堵剂成冻时间和冻胶强度的影响,这些冻胶型堵剂包括交联聚丙烯酰胺形成的铬冻 胶和酚醛树脂冻胶。探讨了 H2s对冻胶型堵剂影响的作用机理。结果表明:H2S对无机铬交联体系的影响较大，而 对有机铬交联体系和酚醛树脂交联体系的影响相对￥小;对于无机铬交联体系，H2S能迅速将Cr“还原为，提 高交联HPAM的速度,而当H2S含量偏高时,被还原出的Cf会与过暈的H2S生成Cr2S3沉淀,不能形成整体冻胶； 对有机铬和酚醛树脂交联体系的影响主要体现在pH值的变化上。当选择冻胶型堵剂应用于含H2S的油气藏时，最 好选用酚醛树脂冻胶。 |
| 关键词: 硫化氢；冻胶 成冻时间；冻胶强度 |
| DOI： |
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| 基金项目:国家“防3”高技术研究发展计划项目(2006AA06Z219);泰山学者建设工程专项资助项目 |
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| Effects of hydrogen sulfide on gel typed plugging agents |
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WANG Ye-fei1,MU U-nal1,YU Pei-zhi2,YOU Qing1,WANG Xian-guang2,HE Long1,SU Chang-ming2
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(1. College of Petroleum Engineering in China University of Petroleum, Dongying 257061, China;2. Research Institute of Petroleum Exploration & Production, SINOPEC，Beijing 100083, China)
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| Abstract: |
| The effects of hydrogen sulfide(H2S) on gelation time and gel strength of gel typed plugging agents were studied. These gels are different polyacrylamide (HPAM) gels using inorganic chromium, organic chromium and phenolaldehyde resin as crosslinkers. The results indicate that the effects of H2S on gelation time and gel strength of inorganic chromium crosslinked gel are great, while the effects on oi^anic chromium and resin crosslinked gel are relatively slight. Tlie related mechanisms were discussed. H2S can accelerate the gelation as a good reducer of Cr6+ , can also form precipitation with Cr3+，depending the concentration of H2S. In the meantime t H2S can change pH value of gel system. Therefore, phenolaldehyde resin gel should be selected as gel typed pluming agents in H2S bearing reservoirs. |
| Key words: hydrogen suliide gel gelation time gel strength |
