水分散型活性固砂剂的制备及性能评价

Preparation and Performance Evaluation of Active Sand Consolidation Agent with Water-dispersion Type

侯影飞 孟新迪 齐升东

HOU Yingfei，MENG Xindi，QI Shengdong

针对胜利油田油井地层砂表面存在的油膜、水膜导致的化学防砂效果不理想的问题，依据自由基接枝反应机理，以环氧树脂为主链，通过在侧链接枝亲水性和亲油性基团制备了活性固砂剂。通过红外光谱、元素分析、热重分析、动态光散射分析等研究了活性固砂剂的结构和固砂剂乳液的稳定性，考察了固结温度、固结时间、原油附着量、填砂管含水率对固结砂芯抗压强度和渗透率的影响。结果表明，接枝了亲水亲油基团的活性固砂剂乳液悬浮性较好、黏度较低。固砂剂热分解温度为80℃，适用于低温井下环境。固结温度、固结时间、填砂管含水率对固结砂芯抗压强度的影响较大。固结岩芯抗压强度随固结时间的延长而增加、随温度升高先增加后降低。随填砂管含水率的升高，固结砂芯抗压强度先增加后降低，渗透率逐渐减小。随油水混合物浸泡液原油含量的增加，固结岩芯抗压强度降低，但降幅较小，受原油附着量的影响较小。在40~80℃、20%原油含量和固结时间72 h 的条件下制得的油砂固结砂芯的抗压强度和渗透率分别为5.5 MPa和17.5 μm2，几乎不受砂粒表面油膜水膜的影响。图10表1 参21

In view of the unsatisfactory chemical sand control effect caused by oil film and water film on the surface of sand in the well of Shengli oilfield，a kind of active sand consolidation agent was prepared by using epoxy resin as main chain and linking hydrophilic and lipophilic groups to side chain which based on the graft reaction mechanism of free radical. The structure of active sand consolidation agent and the stability of sand consolidation agent emulsion were studied by infrared spectroscopy，elemental analysis，thermogravimetric analysis and dynamic light scattering. Meanwhile，the effects of curing temperature，curing time，crude oil content and water content of sand filling tube on the compressive strength and permeability of consolidated core were investigated. The experimental results showed that the active sand consolidation agent with hydrophilic and lipophilic groups had good emulsion stability and low viscosity. The thermal decomposition temperature of sand consolidation agent was 80℃ which was suitable for low temperature underground environment. The effects of curing temperature，curing time and water content of sand filling tube on the compressive strength of consolidated core were great. The compressive strength of consolidated core increased with increasing curing time，and that increased first and then decreased with increasing temperature. With the increase of water content in sand filling tube，the compressive strength of consolidated core increased first and then decreased，and the permeability decreased gradually. With increasing content of crude oil in oil-water mixture，the compressive strength of consolidated core decreased，but the degree of reduction was small，indicating less influence by the content of crude oil. The compressive strength and permeability of consolidated core prepared under the condition of 40—80℃ water bath，20% crude oil content and 72 h curing time were 5.5 MPa and 17.5 μm2 respectively，which almost were not affected by oil and water films on the surface of sand.

10.19346/j.cnki.1000-4092.2018.01.014