Published October 2024, Pg. 22-29
Section: Technique and technology of oil-gas production
UOT: 622.276.(479.24)
DOI: 10.37474/0365-8554/2024-10-22-29
Development and study of a selective isolation technology based on gum arabic-acrylamide taking into account the physicochemical properties of formation waters
Sh.Z. Tapdiqov PhD in Ch. Sc. - “Oil-Gas Scientific Research Project” InstituteThe presented article discusses the preparation and investigation of a composition based on the natural polymer gum arabic and the vinyl monomer acrylamide, which undergoes chemical transformation under downhole conditions to form a gel. N,N-methylenebisacrylamide and FeCl3 salt were used as cross-linking agents during the process. The prepared homogeneous solution had a low density and a pH range of 5.86 to 6.37. The composition is viscoelastic, exhibiting characteristics typical of non-Newtonian fluids and demonstrating the Weissenberg effect. It was determined that the boiling point of the composition is 103.7 oC, and the freezing point is -4.5 oC. Depending on the concentration of the components, the density ranged from 959 to 967 kg/m³, with gel formation occurring within 43–397 minutes at temperatures between 25–75 oC.
At 50 oC, the gelation time ranged from 151 to 183 minutes, depending on the reagent concentrations, which is sufficient for well injection.
During the experiments, the swelling kinetics of the biopolymer-based gel in waters with different hardness and mineral content were studied. The swelling rate of the gels increased rapidly within 3–4 hours, with all water samples showing up to a 300 % increase, meaning the gels absorbed 3–4 times their weight in water or hydrates. It was shown that the swelling of the biopolymer-based gel increased sharply over 1–30 hours and continued to stabilize over the next 160 hours, reaching up to 650 %.
The boiling temperature of the composition corresponding to the optimal formulation is characterized by Raoul’s law. It has been determined that the boiling temperature of the composition prepared is 103.7 oC, while the freezing temperature is -4.5 oC.
The density of the biopolymer-based mixture was determined using a pycnometer at room temperature, and it ranged from 959 to 967 kg/m³ depending on the dose of components.
Prepared composition is in distilled water, its electrical conductivity is very weak and even approaches that of pure water. The electrical conductivity of the biopolymer-based composition prepared in distilled and simple water ranged from 0.04 to 0.07 and 1.6 to 1.7 μS/cm, respectively, depending on the concentration of the reagents in the composition.
The prepared biopolymer-based composition can be used as a plugging material for the isolation of undesirable or formation waters in the oil industry.
References:
1. Ibragimov X.M., Kazimov F.K., Akberova A.F. Lay sularinin selektiv təchridi uchun gelemelegetirici kompozisiyanin ishlenmesi ve laborator tedgigi // Scientific Petroleum, 2022, No.2, 040-046.
2. Sydansk, R.D., Seright, R.S. When and where relative permeability modification water-shutoff treatments can be successfully applied. SPE Production & Operations, 2007, 22(02), 236-247.
3. Sh.Z. Tapdigov, F.F. Ahmad, N.N. Hamidov, E.E. Bayramov. Increase in the Efficiency of Water Shut-off with the Application of Polyethylenpolyamine added Cement. Chemical Problems, 2022, v. 20, pp. 59-67.
4. Kh.M. Ibrahimov, A.A. Hajiyev, A.F. Akberova. Methodology For Determining the Critical Rate and Pressure Depression of The Water Shut-Off Composition // SOCAR Proceedings 2024, No. 1, 012-016.
5. Suleymanov B.А., Gurbanov А.G., Tapdyqov Sh.Z. Izolatsiya vodopritoka v skvajynu termoaktivnoy geleobrazuyutsey kompozisiyey e sermosetinq gel-forming. SOCAR Proceedings, 2022, No.4, pp. 021-026.
6. Majid, A.L., Masoud, H., Mohsen, V.S., Mahsa, B.S., and Aghdas, H. Experimental study of swelling and rheological behavior of preformed particle gel used in water shutoff treatment // Journal of Petroleum Science and Engineering, 2018, 169, pp. 739-747.
7. Ibrahimov Kh.M., Hajiyev A.A., Huseynova N.I. New approach to the diagnostics of current distribution of water flow injected to the Productive Series in the context of the data of “Neft Dashlary” oil field // Azerbaijan oil industry, 2021, № 12, pp. 24-32.
8. Seright, R.S., Lane, R.H., and Sydansk, R.D. A Strategy for Attacking Excess Water Production. SPE Production & Facilities, 2003, 18(03): 158–169.
9. Sh.Z. Tapdigov. The bonding nature of the chemical interaction between trypsin and chitosan-based carriers in immobilization process depend on entrapped method: A Review. International Journal of Biological Macromolecules, 2021, v. 183, pp. 1676-1696.
10. Letifov Y.A., Ibragimov Kh.M. Chokuntu emelle getiren kompozisiya ile quyudibi zonaya tesirin tedgigi // Azerbaijan neft teserrufaty, 2018, № 7-8., s. 31-33.
11. Maharat Huseynov, Shamo Tapdigov, Fariz Ahmad, Sevda Kazimova. Silicon Based Gel to Shut-Off of Water in the Well-Bore. Advanced Materials Research, 2022, v. 1175 (1), pp. 27-34.
12. Al-Muntasheri G.A. Conformance Control with Polymer gels: it Takes to be Succesful. Arabian Journal of Science and Engineering, 2012, v. 37, pp. 1131-1141.
