Development of Viscoelastic Surfactant-Based Self-diverting Acid System to Stimulate Oil Production in Carbonate Reservoirs
| Parent link: | Springer Series in Geomechanics and Geoengineering (SSGG).— .— New York: Springer Nature.— 1866-8763 Proceedings of the International Field Exploration and Development Conference 2022. IFEDC 2022.— 2023.— P. 4848–4868 |
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| Інші автори: | , , , , |
| Резюме: | Title screen Recently, viscoelastic surfactant-based acid (VES) solutions as chemical diverters are becoming more common to stimulate acidizing treatments in carbonate formations. Due to the fact that using polymers and other diverters can lead to damage the well bottom zone characteristics, VES-based acid systems are dominantly getting more intention in the acidizing and fracturing. The gel formed can be broken by contacting with hydrocarbons or other internal and external breakers after the treatment. The technological efficiency of the proposed systems depends on their rheological properties, while it is important to achieve the required rheological characteristics at a minimum surfactant concentration. For this reason, auxiliary chemicals- modifiers of rheological properties, among which electrolytes are the most accessible - are often added to solutions of VES. Also, the use of surfactants with longer hydrocarbon radicals can enhance the viscous properties of the acid system, making it possible to reduce the surfactant’s concentration and consequently the cost of the reagent. This work introduces the rheological behavior of anionic and zwitterionic surfactants in acidic mediums, as well as the calcium chloride and the surfactant’s concentration effect on the change in the rheological properties of the investigated mixture. The corrosion inhibitor and other acid additives like an anti-sludge additive and iron control agent were also selected considering the solution’s viscosity because a lot of them can devastate the rheological properties. The hydrocarbons and temperature effects on the rheological behavior of the VES-based acid system were investigated. The developed solution demonstrates an applicable viscosity of 1800 mPa‧s, at a shear rate of 100 s−1 and a VES concentration of 11%, also possesses high thermal stability at temperatures up to 70 ℃ that makes it applicable for acid stimulation. The obtained results could be suggested to use as a base for developing VES-based self-diverting acid system (SDA), and it is highly recommended to conduct core flooding tests to analyze the impact of the VES on the core's permeability. Also, other methods like dynamic light scattering and cryogenic electron microscopy should be used to study the VES mechanisms in detail Текстовый файл AM_Agreement |
| Мова: | Англійська |
| Опубліковано: |
2023
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| Предмети: | |
| Онлайн доступ: | https://doi.org/10.1007/978-981-99-1964-2_414 |
| Формат: | Електронний ресурс Частина з книги |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=681356 |