稀油井热洗用防漏失暂堵剂 ZD-1的研制及应用

Research and Application of the Leakproof and Plugging Agent ZD-1 for Heat Cleaning of Dilute Oil Well

李 峰 徐 爽 周广安 周月慧

LI Feng，XU Shuang，ZHOU Guang’ an，ZHOU Yuehui

针对月海油田海南 3块的稀油井洗井漏失严重问题， 研制了配方为 0.5%羟丙基瓜尔胶+0.3%有机钛+0.3%十二烷基二甲基甜菜碱+5%石油树脂 （6#） +0.10%亚硫酸钠的稀油井热洗用防漏失暂堵剂 ZD-1， 评价了 ZD-1暂堵剂的封堵性、 破胶性和对储层的伤害性。结果表明， 该暂堵剂对渗透率 100×10-3~1000×10-3μm2的岩心封堵率在 92%以上； 加入 0.02%~0.04%过硫酸铵后能在 3~5 h内完全破胶； 破胶液对岩心渗透率的损害率为 5.23%，对储层伤害较小。现场应用 8口井， 单井平均降低热洗用水 37 m3， 在满足热洗效果的基础上热洗井排水期平均缩短 3.8 d。图5表 6参11

To resolve the serious problem of the washing liquid leakage of dilute oil wells of Hainan the third block in Yuehai oilfield，the ZD-1 temporary plugging agent was developed，composed of 0.5% hydroxypropyl Gua，0.3% organic titanium，0.3% dodecyl dimethyl betaine，5% petroleum resin and 0.10% sodium sulfite，and the sealing performance and breaking performance of gel as well as the damage to the reservoir of the temporary plugging agent were evaluated. The results showed that the plugging rate of the temporary plugging agent to the cores with permeability of 100×10-3—1000×10-3 μm2 was above 92%；and the gel formed by temporary plugging agent was completely broken after adding 0.02%—0.04% ammonium persulfate，and the damage rate of gel breaking liquid to permeability was only 5.23%，which was less damage to the reservoir. The agent has been applied to 8 wells and the hot washing water of the average single well was reduced by 37 m3. The average heat cleaning drainage period shortended about 3.8 days based on achieving the heat cleaning result.

10.19346/j.cnki.1000-4092.2017.02.007