弱凝胶深度调剖剂的开发及应用

Development and Application of Weak Gel as Profile Modification Agent

研究开发了适用于河南油田高含水后期的弱凝胶深度调剖剂。它可用河南油田现场新鲜污水配制,具有成胶时间长(最长18 d),凝胶强度适中(弹性模量为4～6 Pa),可封堵又可运移,热稳定性好的特点,适用于60～90℃的油藏。现场试验表明,调剖后吸水剖面有较好改善,增油效果明显,增油6419 t。

A weak gel as profile modification agent useful in development of Henan Oilfield with high water content was developed. This weak gel comprised fresh produced water in the oilfield. It had characters of long gelation time (up to 18 days) , appropriate strength with storage modulus of 4-6 Pa, capability of plugging and flowing, and good thermal stabilities etc. It could be used in 60-90℃ reservoirs. The field test was made by injecting weak gel into injection well in Shuanghe. The result showed that the oil production could be significantly increased with oil production of 6 419 t.