尕斯E13油藏高温高矿化度调剖剂的研制与性能评价

Development and performance study of high temperature and high salinity profile control agent in Gasikule E13 reservoir

关键词:  高温高矿化度油藏  魔芋胶  调剖剂  配方  性能评价

Key words:  high temperature and high salinity reservoir  konjak powder  profile control agent  formulation  performance evaluation

摘要:

尕斯库勒E¹₃油藏高温高矿化度、油藏非均质性强、剩余油分散、在注水开发过程中水窜严重,导致水驱波及效率较低。对该类油藏,常规化学调剖堵水剂容易产生破胶、降解等现象,难以发挥明显作用。通过实验研制出在平均油藏温度为126 ℃,平均地层水矿化度为16.5×10⁴ mg/L地层中调剖剂体系的优化配方:粗品魔芋粉(质量浓度5.0 g/L)+悬浮剂(质量浓度 700~1 000 mg/L)+交联剂(体积分数1.0%~1.2%)+除氧剂(质量浓度100~200 mg/L)。实验结果表明,该调剖剂在高温(126 ℃)、高盐(矿化度为16.5×10⁴ mg/L)条件下老化30天后,堵剂体系微量脱水,无破胶现象,具有良好的耐温耐盐性能。

Abstract:

In view of the high temperature and high salinity of Gasikule E¹₃ reservoir, the reservoir heterogeneity is strong and the remaining oil is dispersed, and the water channeling is serious during water flooding development, resulting in low efficiency of water flooding. For such a high-temperature and high-salinity reservoir, the conventional chemical profile control plugging agent is prone to breakage and degradation, and it is difficult to play a significant role. The optimal formulation of the profile control agent in the formation with the average reservoir temperature of126 ℃ and the average formation water salinity of 16.5×10⁴ mg/L was developed by the experiment:crude konjak powder (concentration 5.0 g/L) + suspending agent (concentration of 700-1 000 mg/L) + cross-linking agent (volume fraction 1.0%-1.2%) + oxygen scavenger (concentration 100-200 mg/L). The experimental results show that the profile control agent was aging 30 days under the conditions of high temperature(126 ℃) high salt (mineralization degree of 16.5×10⁴ mg/L), then the plugging agent system of micro-dehydration has no broken plastic phenomenon with good temperature resistance and salt resistance.