礁灰岩裂缝充填超轻颗粒用携砂液技术研究

Study on Sand Carrying Fluid Technology for Filling Ultra Light Particles in Reef Limestone Crack

单彦魁 魏裕森 耿学礼 张自印 苏延辉 郑晓斌 史斌

Yankui Shan Yusen Wei Xueli Geng Ziyin Zhang Yanhui Su Xiaobin Zheng Bin Shi

中海石油（中国）有限公司 深圳分公司，广东 深圳 518067 中海油能源发展股份有限公司 工程技术分公司，天津 300451

Shenzhen Branch of CNOOC Ltd. ，Shenzhen Guangdong 518067，China CNOOC EnerTech?Drilling & Production Co. ，Tianjin 300451，China

针对礁灰岩储层在裂缝中充填超轻颗粒的携砂液技术需求，以过滤海水为基液，以助排、分散一体剂为主剂，研究了一套携砂液体系。当携砂液体系的表面张力为24.31 mN/m、界面张力为0.122 mN/m时，具有较好的助排能力，且超轻颗粒在携砂液中分散良好。沉降速度与普通陶粒相比从0.58 cm/s降低至0.35 cm/s，对超轻颗粒具有较好的悬砂效果，砂比为10%~50%的超轻颗粒在搅拌下可有效悬浮，静置后在270~470 s可沉降。研究的携砂液体系可满足超轻颗粒在裂缝中携带和充填的需求。

According to the technical requirements of sand carrying fluid for reef limestone reservoir to fill ultra light particles in cracks. A sand carrying fluid system was studied with filtered seawater as the base fluid and drainage aid and dispersion agent as the main agent. When the surface tension of the sand carrying liquid system is 24.31 mN/m and the interfacial tension is 0.122 mN/m, it has a better assisted drainage ability, and the ultra?light particles are well dispersed in the sand?carrying liquid. Compared with ordinary ceramsite, the settling velocity is reduced from 0.58 cm/s to 0.35 cm/s, it has a good suspended sand effect on ultra light particles. The ultra light particles with 10%~50% sand ratio can be effectively suspended under stirring and settled within 270~470 s after standing. The sand carrying fluid system can meet the needs of carrying and filling ultra light particles in cracks.

中海石油（中国）有限公司深圳分公司重大科技专项(YXKY?2019?ZJ?03);中海油能源发展股份有限公司科研攻关项目(HFKJ?GJ2018?17)

10.3969/j.issn.1672-6952.2021.06.010