含油污泥调剖体系的制备及调剖性能评价

Preparation of Oily Sludge Profile Control System and Evaluation of Profile Control Performance

戴彩丽 徐忠正 刘佳伟 孙 雯 陈 佳 赵 光 李 琳

DAI Caili XU Zhongzheng LIU Jiawei SUN Wen CHEN Jia ZHAO Guang LI Lin

针对东风港油田含油污泥含油量较高且不具备除油除水设备条件的情况，直接对油泥混合物进行机械筛分研磨、乳化悬浮处理，以机械剪切法为主导制备了含油污泥调剖体系。优化了含油污泥调剖体系的使用条件，评价了其注入性能、封堵性能和调驱效果。结果表明，在含油污泥中加入配方为0.2%丙烯酸酯共聚物悬浮剂（SF）+0.2%三乙醇胺单硬脂酸酯乳化剂（FM-20）的调剖体系，常温和90℃下均可使悬浮时间大于10 h。在用机械剪切法制备含油污泥调剖体系时，适宜的条件为：含油污泥和水的质量比（固液比）4%～8%、剪切转速约6400r/min、剪切时间约3 min。含油污泥调剖体系具有较好的注入性和封堵性。在单管填砂管中注入该体系后，不同渗透率填砂管的封堵率大于90%。经含油污泥调剖后，二次水驱的采出程度提高了25.01%。此方法操作简便、成本低、二次污染少，在含油污泥处理和资源化利用方面具有良好的应用前景。

In consideration of the high oil content of oily sludge and a lack of oil and water removal facilities in Dongfenggang oilfield，the oily sludge mixture was directly subjected to mechanical sieving and grinding，emulsification and suspension treatment without preliminary oil-removing process. An oily sludge profile control system prepared mainly by mechanical shearing method was established. The operating conditions of oily sludge profile control system were optimized，and its injection，plugging and profile-control and displacement performances were evaluated. The results showed that the suspension time of profile control system，which was prepared by adding 0.2% acrylate copolymer suspension （SF） and 0.2% triethanolamine monostearate emulsifier（FM-20）into the oily sludge，was greater than 10 h at room temperature and 90°C. During the preparation of the oily sludge profile control system by mechanical shearing，the optimum conditions included 4%—8% the mass ratio of oil-bearing sludge to water（solid-liquid ratio），around 6400 r/min shear speed，and about 3 min shear time. The oily sludge profile control system possessed good injection and plugging properties. After the system was injected into a single sand-filled pipe，the plugging rate of sand filling pipes with different permeability reached over 90%. The recovery degree of secondary water flooding increased by 25.01% . This method possessed the advantages of simple operation，low cost and reduced secondary pollution，exhibiting excellent application prospects for the treatment and resource utilization of oily sludge

10.19346/j.cnki.1000-4092.2021.01.011