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发明公开
CN107722957A 一种基于清洁压裂返排液的弱凝胶调驱剂 无效 - 驳回

一种基于清洁压裂返排液的弱凝胶调驱剂
摘要：
本发明公开了一种基于清洁压裂返排液的弱凝胶调驱剂，其质量百分比组成为：阳离子聚丙烯酰胺0.3～0.5％、乌洛托品0.05％～0.1％、草酸0.005％～0.02％、苯酚0.05％～0.1％，间苯二酚0.01％～0.04％、碳酸钠0.01％～0.05％、稳定剂0.01％～0.02％，其余为清洁压裂返排液。本发明采用清洁压裂返排液制备的弱凝胶抗盐、稳定性能好，封堵率达到90％以上，剖面改善率达到85％以上，具有较强的调剖封堵效果，驱油率提高14.8％～38.7％，用于中温调驱，可缓解压裂返排液处理压力，实现综合利用目标。
摘要（英）：

The invention discloses a weak gel modifying and flooding agent based on cleaning and fracturing flow-back liquid. The weak gel modifying and flooding agent comprises, by mass, 0.3-0.5% of positive-ion polyacrylamide, 0.05-0.1% of urotropin, 0.005-0.02% of oxalic acid, 0.05-0.1% of phenol, 0.01-0.04% of resorcinol, 0.01-0.05% of sodium carbonate, 0.01-0.02% of stabilizing agent and the balance cleaning and fracturing flow-back liquid. The weak gel modifying and flooding agent has the advantages that weak gel modifying and flooding agent made from the cleaning and fracturing flow-back liquid has high salt resistance and stability, stemming ratio reaches 90% or more than 90%, profile improvement rate reaches 85% or more than 85%, high profile controlling and stemming effect is achieved, oilflooding rate is increased by 14.8-38.7%, the weak gel modifying and flooding agent is used for medium-temperature modifying and flooding and can relieve treating pressure of the fracturing flow-backliquid, and the compressive utilization target is achieved.

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