海上油田热采封窜用强化高温冻胶的制备与性能评价  

Preparation and Performance Evaluation of Enhanced High Temperature Gel for Steam Flooding and Channeling in Offshore Oil Fields

作　　者：王少华[1] 孙玉豹[1] 吴春洲[1] 肖洒[1] 汪成[1] WANG Shao-hua;SUN Yu-bao;WU Chun-zhou;XIAO Sa;WANG Cheng(Production Optimization,China Oilfield Services Limited,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司油田生产事业部,天津300459

出　　处：《科学技术与工程》2021年第3期996-1002,共7页Science Technology and Engineering

基　　金：国家科技重大专项(2016ZX05058-003-009)。

摘　　要：针对海上热采封窜的要求,采用环保型水溶性酚醛树脂为交联剂,与主剂栲胶和热稳定剂纳米材料复合研发了新型强化耐温冻胶。相比于传统冻胶,新型强化耐温冻胶的弹性模量得到大幅度提高。同时亲水性纳米材料的加入强化了冻胶对游离水的结合能力。当硅溶胶的用量达到4%时,250℃热处理30 d后无游离水析出。通过热采封窜物模实验对比了传统栲胶冻胶和强化耐温冻胶的封窜效果,物模结果表明强化耐温冻胶在老化60 d后,在250℃的条件下封堵率仍然大于80%;将冻胶至于渗透率2~10μm^2的多孔介质中,连续冲刷24倍孔隙体积后,冻胶的封堵率下降小于10%。实验结果显示,新研制的耐温冻胶具有较强的耐冲刷性能和封堵持久性,可以作为一种满足热采封窜需求的高温热采封窜剂。In order to meet the requirements of offshore thermal recovery and sealing,a new heat-resistant gel was developed.The environment-friendly water-soluble phenolic resin was used as the crosslinking agent,the vegetable tannin extract as the main agent and the silicon nanomaterial as heat stabilizer.The elastic modulus of this heat-resistant gel was apparently higher than that of traditional gel.The addition of hydrophilic silicon nanomaterial reinforces the ability to bind free water of gelatin.When the dosage of silicon reached 4%,there was no free water in the gel after 30 days of heat treatment under the environment of 250℃.The sealing effect of traditional gelatin gel and reinforced temperature-resistant gel was compared through thermal mining and sealing mold experiment.The results of experiment showed that the plugging rate of the reinforced temperature-resistant gel was still greater than 80%at 250℃after 60 days of heat treatment.In the porous media with a permeability of 2~10μm 2,the plugging rate of the gel decreased by less than 10%after continuous erosion of 24 times pore volume.The results of experiment show that the gel has strong erosion resistance and plugging durability,so it can be used as a thermal sealing agent to meet the needs of thermal recovery and sealing.

关 键 词：热采封窜 热采 栲胶 冻胶 采收率 

分 类 号：TE358.3[石油与天然气工程—油气田开发工程]