有机复合交联堵剂的研制及应用

【作者】 余光明；

【导师】 王健；

【作者基本信息】 西南石油学院 ， 油气田开发工程， 2003， 硕士

【摘要】 本文针对克拉玛依油田低渗透裂缝性油藏调剖堵水存在的技术难题，以部分水解聚丙烯酰胺HPAM为主剂，有机Cr³⁺离子和有机酚醛为交联剂，CRC为增强剂，筛选出了有机复合交联堵剂的最佳配方。评价了堵剂在七中区佳木河组和八区下乌尔禾组两种油藏条件下的成胶时间、成胶强度、抗盐性、抗温性、时间稳定性、耐压强度、选择注入性、吸水剖面改善率和驱油效率。实验结果表明，有机复合交联堵剂的成胶时间在2-72小时可调可控，抗压强度可达26-61 MPa／m，而且具有很好的长期稳定性。 本文还对有机复合交联堵剂的复合交联机理进行了实验研究。研究结果表明，HPAM羧基与Cr³⁺离子在地面条件下的一次交联作用有利于减少堵剂在油层的漏失量，HPAM酰胺基与有机酚醛在地层条件下的二次交联作用，能够形成耐温高强度凝胶。 在上述研究的基础上，2001年10月使用有机复合交联堵剂在克拉玛依油田八区下乌尔禾组85079井组和七区佳木河组7511、7515油井进行了矿场应用，截止2002年10月底，累计增油2065吨，取得了显著的增油效果。更多还原

【Abstract】 In this paper, the best formulation of the organic compound cross-linking agent which takes the partially hydrolyzed polyacrylamide as the main chemical and take the organic Cr3+ and phenolic aldehyde as cross-linker was selected, according to the technical problems of profile modification and water shut-off encountered in low penetrability and fracture-type reservoir in KeLaMaYi oil field. Thus, on the reservoir conditions of the seventh middle area of JiaMuHe and eighth area of XiaWuErHeZu, the qualities of blocking agent such as gelatification time, the gel strength, the salt resistance, the temperature resistance, the stability, the compressive strength, the selection of injection, the improvement ratio of water entry profile and the sweeping efficiency were evaluated. The experimental results indicated that this blocking agent have following advantages: its gelatification time can be controlled and adjusted between 2-72 hours, its compressive strength can reach from 26 MPa/m to 61 MPa/m, and its stability is perfect within a long time.Furthermore, the experiment research was conducted to study its organic compound crosslink mechanism. The research results indicated that the first cross-linking between the HPAM and Cr3+ in ground condition was propitious to reduce leaking of blocking agent in oil layer, and the second crosslink action between acylamino of HPAM and organic phenolic aldehyde can form the high intensity gel and it can endure high temperature.Based on these research works, in October 2001 this blocking agent was applied in XiaWuErHe 85079 well pattern and JiaMuHe 7511, 7515 wells in KeLaMaYi oil field. By the end of October 2002, it has increased oil production accumulated to 2065 tons, acquired notable effect.更多还原