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耐高温无机非金属胶凝材料堵剂

期刊名称：油田化学，2009，（03）
时间：0
分类：TE39[石油与天然气工程—油气田开发工程] TE357.44[石油与天然气工程—油气田开发工程]
作者机构：[1]提高油气采收率教育部重点实验室(大庆石油学院),黑龙江大庆163318, [2]中国石油辽河油田分公司钻采院油化所,辽宁盘锦124010, [3]辽宁工学院材料与化学工程学院,辽宁锦州121001
相关基金：国家自然科学基金重点项目（项目编号50634020）“低渗透油层提高驱油效率的机理研究”.
相关项目：低渗透油层提高驱油效率的机理研究

关键词：无机胶凝材料, 金属尾矿熟料, 粉煤灰, 无机凝胶, 配方研究, 堵水调剖剂, 调剖, 注蒸汽井, 辽河大洼油田, inorganic cementitious material, metal gangue clinker, fly ash, inorganic gel, composition and formulations, profile modifying/water shutoff agent, injectivity profile modification, steam injection well, Dawa oil field in Liaohe

中文摘要：

采用湿法预均化工艺并细磨加工,由质量比7∶1的金属尾矿熟料和粉煤灰制成了水硬气硬性无机非金属胶凝材料,用作耐高温的调剖堵水剂。室内考察了胶凝材料/水化抑制剂/活化剂/水浆液的有关性能。实验用胶凝材料粒度一般为270、325目,最小的为400目;室温下浆液不析水,离析现象轻微,粒度减小时浆液放置稳定性增大,稠化时间缩短,固结体抗压强度增大。浆液可泵性好;1 L水中加入150 g胶凝材料配成的浆液,常压、25℃黏度为320mPa.s,至少可维持3-4天不增大;浆液20℃下40天不固结;不加活化剂的浆液60℃下15天不稠化;胶凝材料用量增大（50-150 g/L水）或温度升高（40-80℃）时稠化时间减小,抗压强度增大。组分用量影响和填砂管封堵实验结果均表明,抑制剂和活化剂用量有上限,分别为胶凝材料质量的5%和10%。分析了出现用量上限的化学反应机理。电镜照片显示固结后的浆体含有孔隙。该胶凝材料已用于辽河大洼油田一口注蒸汽井的调剖,共注入浆液120 m3,初步结果良好,4口井采出井中有2口增油又降水,2口井降水。图5表4参6

英文摘要：

A water and gas hardening inorganic non-metallic cementitious material（INCM） was prepared from metal gangue clinker and fly ash in mass ratio 7∶1 by wet prehomogenization and fine grinding and used as high temperature profile modification/water shutoff agent.The performance properties of INCM/polymeric hydration inhibitor（PHI）/hydration activator（HA）/water slurries were investigated in laboratory.The INCM used was of particle size 270 and 325 mesh in common cases and of the smallest particle size 400 mesh;the slurries showed no bleeding and very slight solid-liqued spearation and their stability at standing improved,their thickening time shortend and the compression strength（CS） of set INCM increased with decreasing INCM particle size.The slurries possessed good pumpability;the viscosity of the slurry of 150 g INCM in 1 L water was of 320 mPa·s at 25℃ and practically did not rise at least in 3—4 days;the slurries did not set at 20℃ in 40 days;the slurry without HA added did not thicken at 60℃ in 15 days.The thickening time shortened and the CS of set INCM improved with increasing INCM dosage from 50 to 150 g/L water or with raising temperature from 40℃ to 80℃.Additives dosage experiments and sandpacks plugging tests showed that there existed an upper dosage limit in INCM slurries for PHI and HA,which was of 5% and 10% of mass of INCM taken,respectively.The chemical mechanisms involved in the upper dosage limits were analyzed.Pores were observed in set INCM as demonstrated by SEM photo.This INCM slurry was used for profile modification in a steam injection well of Dawa oil field,Liaohe,with 120 m3 of slurry injected and the preliminary field results were satisfactory：increase in oil output and decrease in water cut were observed in 2 of 4 production wells and decrease in water cut——in another 2.

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