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高温高盐碎屑岩油藏注气用复合磺酸盐起泡剂性能

Properties of Compound Sulfonate Foamers for Gas Injection in High-Temperature and High-Salinity Clastic Reservoirs

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碎屑岩油藏岩石表面带负电,注气用起泡剂应优先选择阴离子表面活性剂.α-烯烃磺酸钠(AOS)是常用的阴离子类起泡剂,但在高盐含量水中溶解性差.将AOS和烷基二苯醚二磺酸钠(B2)复配,形成在矿化度1.12×105 mg/L模拟地层水中具有较好溶解性的起泡剂AOS51(m(AOS)∶m(B2)=5∶1).在温度110 ℃、压力30 MPa条件下,AOS51发泡率与在高盐条件下性能最好的羟磺基甜菜碱类起泡剂S23相当,而泡沫稳定性略逊于S23.静态吸附实验结果表明,AOS51在质量分数0.05％～1.0％范围内吸附量低于0.30 mg/g;起泡剂质量分数小于0.20％时AOS51与S23吸附量差异不大,但当起泡剂质量分数大于0.20％时S23的吸附量明显高于AOS51.岩心流动实验结果表明,质量分数0.10％和0.20％的AOS51在气测渗透率为80 mD和180 mD岩心中形成泡沫的阻力因子分别大于65、75和125、270,同时还表现出选择性流度降低特征;相同条件下AOS51流度调控能力优于S23.
Since the rock surface of clastic reservoirs is negatively charged,anionic surfactants should be preferred as the foamers for gas injection.Sodium alpha olefin sulfonate(AOS)is a commonly used anionic foamer,but has poor solubility in high-salinity water.AOS and sodium alkyl diphenyl ether disulfonate(B2)were compounded to form a foamer AOS51(m(AOS)∶m(B2)=5∶1),which has good solubility in simulated formation water with a salinity of 1.12×105 mg/L.At temperature of 110 ℃ and pressure of 30 MPa,AOS51 has a foaming rate comparable to and a foam stability slightly inferior to S23,the best-performing hydroxysulfobetaine foamer under high salinity conditions.The results of static adsorption experiments show that in the mass fraction range of 0.05％—1.0％,AOS51 has the adsorption amount lower than 0.30 mg/g,and there is little difference in the adsorption of AOS51 and S23 at mass fractions lower than 0.20％.However,S23 has significantly higher adsorption amount than AOS51 when the foamer's mass fraction is greater than 0.20％.The results of core flow experiments show that the resistance factors of AOS51 with mass fractions of 0.10％and 0.20％are greater than 65,75 and 125,270 for the formation of foam in cores with gas-measured permeabilities of 80 mD and 180 mD,respectively,and the selective mobility reduction characteristics are also shown;under the same conditions,the mobility control ability of AOS51 is better than that of S23.

clastic reservoirhigh-temperature and high-salinity reservoirgas injectionfoameradsorption amountresistance factorsodium alpha olefin sulfonatehydroxysulfobetaine

李隆杰、葛际江、刘加元、李珂欣、潘妍、阎更平

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中国石油大学(华东)石油工程学院,山东青岛 266580

中国石油塔里木油田公司塔中采油气管理区新疆库尔勒 841000

山东石油化工学院化学工程学院,山东东营 257061

中国石油塔里木油田公司勘探开发研究院,新疆库尔勒 841000

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碎屑岩 高温高盐油藏 注气 起泡剂 吸附量 阻力因子 α-烯烃磺酸钠 羟磺基甜菜碱

中国石油天然气集团有限公司重大科技项目

2019-ZD-183-007-003

2024

10.3969/j.issn.1001-8719.2024.04.026

石油学报(石油加工)
中国石油学会

石油学报(石油加工)

CSTPCD北大核心
影响因子：0.764
ISSN：1001-8719
年,卷(期)：2024.40(4)
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