针对油田采出液难处理、纳米颗粒制备成本高的问题,采用鲁克沁稠油采出液合成菱-球混合形纳米碳酸钙颗粒,通过泡沫稳定性实验及岩心驱替实验,研究纳米碳酸钙颗粒的稳泡性能及该泡沫体系的驱油效果。结果表明:合成的纳米碳酸钙颗粒可有效增强泡沫稳定性;当纳米颗粒质量分数为0.2%、体系矿化度为5 000 mg/L、温度为80 ℃时,纳米颗粒发泡体积为530 mL,析液半衰期达528 s;泡沫体系具有良好的耐盐、耐温及抗吸附性能;水驱油藏(含水率为达80%)转泡沫驱,纳米颗粒泡沫可形成3 MPa左右的稳定驱替压差,采出率由39.84%增至80.16%。利用油田采出液稳定合成出纳米碳酸钙颗粒,可作为泡沫稳定剂提高泡沫稳定性,并用于矿场驱替试验改善泡沫驱油效果。
On account of intractable treatment of produced fluid in oilfield and high cost of nanoparticle preparation, rhombic-spherical mixed calcium carbonate nanoparticles were synthesized from produced fluid of Lukeqin heavy oil. Foam stability test and core displacement test were conducted to study the foam stabilization performance of calcium carbonate nanoparticles and the oil displacement effect of the foam system. The results showed that the synthesized calcium carbonate nanoparticles effectively enhanced the foam stability; when the mass fraction of nanoparticles was 0.2%, the salinity of the system was 5 000 mg/L and the temperature was 80 ℃, the foaming volume of nanoparticles was 530 mL, and the foam drainage half-life was 528 s; the foam system had excellent salt and temperature tolerance and adsorption resistance; the water flooding in the reservoirs (water content up to 80%) was converted to foam flooding, and the nanoparticle foam had a stable flooding pressure difference of about 3 MPa, and the recovery rate was increased from 39.84% to 80.16%. Calcium carbonate nanoparticles were stably synthesized by using oilfield produced fluid, which can be used as foam stabilizer to improve foam stability, and can be used in field flooding test to improve foam flooding effect.
[1] 赵明元.砂岩油田开发阶段划分问题的探讨[J].石油勘探与开发,1986,13(2):51-57,42.
ZHAO Mingyuan.Discussion on the division of sandstone oilfield development stages[J].Petroleum Exploration and Development,1986,13(2):51-57,42.
[2] SHOKUFE A,NINA R,SOHRAB Z.A comprehensive review on enhanced oil recovery by water alternating gas (WAG) injection[J].Fuel,2018,227:218-246.
[3] 刘德华.油田开发中后期综合治理技术研究[D].成都:西南石油大学,2005.
LIU Dehua.Study on comprehensive treatment technology in the middle and late stages of oilfield development[D].Chengdu:Southwest Petroleum University,2005.
[4] XIE Jun,HU Xiao,LIANG Huizhen,et al.Experimental investigation of permeability heterogeneity impact on the miscible alternative injection of formation brine-carbon dioxide[J].Energy Reports,2020,6:2897-2902.
[5] 周总瑛,张抗.中国油田开发现状与前景分析[J].石油勘探与开发,2004,31(1):84-87.
ZHOU Zongying,ZHANG Kang.Development situation and prospect of oil fields in China[J].Petroleum Exploration and Development,2004,31(1):84-87.
[6] 郭文敏.特高含水期注采调控水动力学方法研究[D].北京:中国地质大学(北京),2016.
GUO Wenmin.Hydrodynamics intensity method of well patterns and rate adjustment in ultra-high water cut state[D].Beijing:China University of Geosciences(Beijing),2016.
[7] 荣雁.油田污水管道的防腐蚀[J].腐蚀与防护,2020,41(12):64-69,74.
RONG Yan.Corrosion protection for sewage pipeline in an oilfield[J].Corrosion & Protection,2020,41(12):64-69,74.
[8] 王道平.油田注水管道腐蚀机理分析及防腐技术[J].全面腐蚀控制,2021,35(1):113-114.
WANG Daoping.Corrosion mechanism analysis and anti-corrosion technology study of oilfield reinjection water pipeline[J].Total Corrosion Control,2021,35(1):113-114.
[9] XU Xianzhen,CAO Dan,LIU Jin,et al.Research on ultrasound-assisted demulsification dehydration for crude oil[J].Ultrasonics Sonochemistry,2019,57:185-192.
[10] WANG Zhenjun,GU Simin,ZHOU Long.Research on the static experiment of super heavy crude oil demulsification and dehydration using ultrasonic wave and audible sound wave at high temperatures[J].Ultrasonics Sonochemistry,2018,40:1014-1020.
[11] 刘珑,范洪富,孙江河,等.纳米颗粒稳定泡沫驱油研究进展[J].油田化学,2019,36(4):748-754.
LIU Long,FAN Hongfu,SUN Jianghe,et al.Research progress of nanoparticles-stabilized foam for EOR[J].Oilfield Chemistry,2019,36(4):748-754.
[12] WANG Jun,SONG Jingzhao,JI Zhiyong,et al.The preparation of calcium carbonate with different morphologies under the effect of alkanolamide 6502[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2020,588:124392.
[13] HAMIDREZA G,AMIRI M C.Effects of temperature and surfactant concentration on the structure and morphology of calcium carbonate nanoparticles synthesized in a colloidal gas aphrons system[J].Journal of Molecular Liquids,2019,282:213-220.
[14] 崔燕贞.纳米碳酸钙-表面活性剂混合体系的泡沫性能研究[D].无锡:江南大学,2009.
CUI Yanzhen.Study on foaming performance of nano calcium carbonate-surfactant mixture system[D].Wuxi:Jiangnan University,2009.
[15] 魏勇,邓昌联,肖毓,等.鲁克沁稠油提高采收率泡沫体系室内研究[J].中外能源,2019,24(8):54-59.
WEI Yong,DENG Changlian,XIAO Yu,et al.Laboratory study on foam system for enhanced oil recovery of Lukeqin heavy oil[J].Sino-Global Energy,2019,24(8):54-59.
辽公网安备 21110002000031号 辽ICP备18011648号-1
