Increasing the efficiency of water shut-off in oil wells using sodium silicate

User Rating:  / 1
PoorBest 

Authors:


D.Zh.Abdeli, orcid.org/0000-0002-1753-4952, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

H.Daigle, orcid.org/0000-0002-6062-8321, University of Texas at Austin, Austin, USA, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

A.S.Yskak, orcid.org/0000-0002-2532-2642, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

A.S.Dauletov, orcid.org/0000-0001-5777-4750, Embamunaigas JSC, Atyrau, the Republic of Kazakhstan, -mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

K.S.Nurbekova, orcid.org/0000-0002-2576-5195, Almaty University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.


повний текст / full article



Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2021, (1): 026 - 031

https://doi.org/10.33271/nvngu/2021-1/026



Abstract:



Purpose.
Substantiation of technology for creation of a water-blocking zone below an oil reservoir and calculation of the proper composition of a gel-forming compound based on sodium silicate, in order to reduce water cut in production wells.


Methodology.
The goal of the work was achieved by conducting theoretical and experimental studies on technological processes of water blocking in an oil reservoir, and by identifying patterns of gel formation of sodium silicate and hydration of a micro-cement solution in reservoir conditions on full-scale models. The gel compound included sodium silicate (Na2SiO3, also referred to as liquid glass) and an aluminum salt cross-linker (AS-1). The plugging material mixture of Portland micro-cement and sodium silicate contained calcium oxide, to allow expansion, and a GL-1 reaction inhibitor. The criteria for assessing the creation of a reliable water-blocking zone in an oil reservoir are: the mobility of the aqueous solution of the gel-forming compound during its movement from the wellhead to the bottom of the well, the low permeability of the zone following its creation, and the sufficient strength of the non-shrink micro-cement in the annulus of the well.


Findings.
A new technology is suggested used to create a water isolation zone is a gel-forming compound based on sodium silicate, which provides a significant reduction of water cut in oil production. It is found that perforation of production string below the oil reservoir at the level of the water-saturated zone followed by injection into a well through perforated channels, the mixture of fresh water and the gel-forming compound prevents water inflow to the bottom of the well. Experiments established that with a gelation time of 2 hours at a temperature of 80 C, the viscosity of the gel is in the range of 1.22.9 Pas, and the density is 10801109 kg/m3. These values for the viscosity of the gel allow transportation from the top of the well to the bottom with the least resistance to motion. Following gelation time, the viscosity increases significantly, and after 3 days the gel viscosity reaches a range of 3.46.7 Pas. The values indicated for the viscosity of the gel are much greater than those of oil. Therefore, the proposed gel-forming compound provides a reliable water shut-off zone at the bottom of an oil reservoir, and prevents the influx of water at the bottom of a well.


Originality.
The proposed sodium silicate compound allows for the creation of a reliable water shut-off zone and an enhanced grouting material, based on the combination of sodium silicate and micro-cement, which together provide a significant reduction in water cut in wells during oil production.


Practical value.
A method for studying technological processes of oil reservoir water-blocking has been devised and the rational composition of gel-forming compound and micro-cement grout slurry with an expanding additive and a reaction retarder in reservoir conditions on full-scale models has been established. The application of the research results in oil fields allows reduction of water cut in production wells to 010%, against existing values of 7090%, and an increase in flow rate in producing wells by 2030%.

Key words: oil well, water, water-blocking zone, sodium silicate (liquid glass), micro-cement, water shut-off

References.


1. Pham, L.T., & Hatzignatiou, D.G. (2016). Rheological evaluation of a sodium silicate gel system for water management in mature, naturally fractured oilfields. Journal of Petroleum Science and Engineering, 138, 218-233.https://doi.org/10.1016/j.petrol.2015.11.039.

2. Afeez O. Gbadamosi, Radzuan Junin, Muhammad A.Manan, Augustine Agi, & Adeyinka S. Yusuff (2019). An overview of chemical enhanced oil recovery: recent advances and prospects. International Nano Letters, 9, 171-202. https://doi.org/10.1007/s40089-019-0272-8.

3. Mallakpour, S., & Khadem, E. (2015). Recent development in the synthesis of polymer nanocomposites based on nano-alumina. Progress in Polymer Science, 51, 74-93. https://doi.org/10.1016/j.progpolymsci.2015 .07.004.

4. Guo, H., Li, Y., Wang, F., Yu, Z., Chen, Z., Wang, Y., & Gao,X. (2017). ASP flooding theory and practice progress in China. Journal of Chemistry, 2017. https://doi.org/10.1155/2017/8509563.

5. Aitkulov, A., Luo, H., Lu, J., & Mohanty, K.K. (2017). Alkalicosolventpolymer flooding for viscous oil recovery: 2D evaluation. Energy Fuels, 31, 7015-7025 https://doi.org/10.1021/acs.energyfuels.7b00790.

6. Barati-Harooni, A., Najafi-Marghmaleki, A., Tatar, A., & Mohammadi, A. (2016). Experimental and modeling studies on adsorption of a nonionic surfactant on sandstone minerals in enhanced oil recovery process with surfactant flooding. Journal of Molecular Liquids. https://doi.org/10.1016/j.molliq.2016.04.090.

7. Lakatos, I.J., Lakatos-Szabo, J., Szentes, G., Vago, A., Karaffa, Zs., & Bodi, T. (2015). New Alternatives in Conformance Control: Nanosilica and Liquid Polymer Aided Silicate Technology. Paper SPE-174225-MS, SPE European Formation Damage Conference and Exhibition. Society of Petroleum Engineers, Budapest, Hungary. https://doi.org/10.2118/174225-MS.

8. Askarinezhad, R., Hatzignatiou, D.G., & Stavland, A. (2017). Disproportionate Permeability Reduction of Water-Soluble Silicate Gelants: Importance of Formation Wettability. SPE Production and Operation, 32(03), 362-373. https://doi.org/10.2118/ 179589-PA.

9. Hatzignatiou, D.G., & Giske, N.H. (2016). Water-Soluble Sodium Silicate Gelants for Water Management in Naturally Fractured Carbonate Reservoirs. Paper SPE-180128-MS, SPE Europec featured at 78th EAGE Conference and Exhibition, 479, (pp. 72-81), 30 May-2 June, Vienna, Austria. https://doi.org/10.2118/180128-MS.

10. Yue Qiu, Mingzhen Wei, Jaming Geng, & Fengxiang Wu (2016). Successful Field Application of Microgel Treatment in High Temperature High Salinity Reservoir in China. SPE-179693-MS SPE Improved Oil Recovery Conference, 11-13 April, Tulsa, Oklahoma, USA. https://doi.org/10.2118/179693-MS.

11. Hatzignatiou, D.G., Askarinezhad, R., Giske, N.H., & Stavland, A. (2015). Laboratory Testing of Environmentally Friendly Chemicals for Water Management. Paper SPE 173853-PA, Production & Operations Journal. https://doi.org/10.2118/173853-PA.

12. Lakatos, I.J., Lakatos-Szabo, J., & Szentes, G. (2018). Revival of Green Conformance and IOR/EOR Technologies: Nanosilica Aided Silicate Systems A Review. SPE-189534-MS. https://doi.org/10.2118/189534-MS.

13. Tariq K.Khamees, Ralph E.Flori, & Sherif M.Fakher (2018). Numerical Modeling of Water-Soluble Sodium Silicate Gel System for Fluid Diversion and Flow-Zone Isolation in Highly Heterogeneous Reservoirs. SPE Trinidad and Tobago Section Energy Resources Conference, 25-26 June, Port of Spain, Trinidad and Tobago. https://doi.org/10.2118/191200-MS.

14. Abdeli, D.Zh., Yskak, A.S., Rahmetov, O.Zh., Lei, T., & Van, Ts. (2019). Establishing rational parameters of the sealing process annular space in the bottom-hole zone of oil wells. Proceedings of the Satbayev readings Innovative technologies are the key to the successful solution of fundamental and applied problems in the ore and oil and gas sectors of the economy of the Republic of Kazakhstan, 1, 360-365.

 

Visitors

3417547
Today
This Month
All days
13
37153
3417547

Guest Book

If you have questions, comments or suggestions, you can write them in our "Guest Book"

Registration data

ISSN (print) 2071-2227,
ISSN (online) 2223-2362.
Journal was registered by Ministry of Justice of Ukraine.
Registration number КВ No.17742-6592PR dated April 27, 2011.

Contacts

D.Yavornytskyi ave.,19, pavilion 3, room 24-а, Dnipro, 49005
Tel.: +38 (056) 746 32 79.
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
You are here: Home Home EngCat Archive 2021 Content №1 2021 Increasing the efficiency of water shut-off in oil wells using sodium silicate