DEVELOPMENT OF A TECHNOLOGY FOR ISOLATING GAS AND GAS-CONDENSATE RESERVOIRS DURING HORIZONTAL WELL OPERATIONS (A CASE STUDY OF THE SHURTAN FIELD)
Keywords:
Shurtan field, horizontal wells, gas-condensate reservoir, water coning, selective isolation, polymer gel, organosilicon compounds, permeability, water shut-off.Abstract
This paper investigates the enhancement of water shut-off and selective gas/water isolation technologies in horizontal wells of the mature Shurtan gas-condensate field. Due to severe reservoir pressure depletion and premature bottom-water and edge-water breakthrough, horizontal wellbores experience significant liquid loading and hydrocarbon recovery decline. Under the IMRAD framework, the paper addresses the limitations of conventional Portland cement and standard polyacrylamide slurries in horizontal trajectories and proposes a high-temperature organosilicon-nanocellulose crosslinked viscoelastic gel system. Experimental filtration runs on natural carbonate cores under reservoir conditions (115–125 °C and 14–18 MPa) confirmed a selective water shut-off efficiency of 94.6% while preserving effective gas permeability. The implementation of this technology suppresses water coning, restores gas-condensate rates, and extends workover intervals by up to 2.5 times.
References
O‘zbekiston Respublikasi Prezidentining 2020-yil 28-apreldagi PQ-4699-son "Neft-gaz tarmog‘ining moliyaviy barqarorligini oshirish bo‘yicha birinchi navbatdagi chora-tadbirlar to‘g‘risida"gi Qarori.
Agzamov, A. X., & Karimov, A. A. (2021). Gorizontal quduqlarni burg‘ilash va ishlatishda asoratlarning oldini olish texnologiyalari. Toshkent: Fan va texnologiya, 224 b.
Seright, R. S., Lane, R. H., & Sydansk, R. D. (2003). A strategy for resolving water production problems in gas and oil wells. SPE Production & Facilities, 18(03), 188–199. https://doi.org/10.2118/84962-PA
Sydansk, R. D., & Romero-Zerón, L. (2011). Reservoir Conformance Technologies. Society of Petroleum Engineers (SPE), Richardson, TX, 240 p.
Xudoyberdiyev, A. O., & Eshmurodov, S. M. (2022). Sho‘rtan gaz-kondensat konining geologik-gidrodinamik xususiyatlari va qatlam bosimi pasayishi davrida quduqlar mahsuldorligini saqlash usullari. O‘zbekiston neft va gaz jurnali, (3), 42–47.
Al-Muntasheri, G. A. (2014). A critical review of water shutoff gelling systems for high-temperature applications. SPE International Conference on Water Handling and Management, Muscat, Oman. https://doi.org/10.2118/164807-MS
Qodirov, B. B., & Tursunov, N. R. (2023). Gaz quduqlarida suv yorib kirishiga qarshi kurashda kremniyorganik tamponaj qorishmalarini qo‘llash samaradorligi. Konchilik ishi va metallurgiya axborotnomasi, 4(12), 88–94.
Mao, H., Qiu, Z., Shen, Z., & Huang, W. (2020). Hydrophobic and selective polymer gel systems for water conformance control in fractured tight gas reservoirs. Journal of Petroleum Science and Engineering, 187, 106821.
Ravshanov, F. R. (2021). Gaz-kondensat konlaridagi gorizontal quduqlarda quduq tubi atrofini tozalash va izolyatsiyalash tadbirlari tahlili. Fan va innovatsion taraqqiyot, 4(5), 65–73.
ISO 10426-1:2009. Petroleum and natural gas industries — Cements and materials for well cementing — Part 1: Specification.
