Cyclical Gel-Polymer Flooding Technology is an Effective Method of Enhanced Oil Recovery in High-Viscosity Oil Fields (Russian)

Lobanova, Svetlana Yur’evna; Yelubaev, Berdibek Ulanovich; Talamanov, Nikolay Evgen’evich; Sun, Zhijian; Wang, Handong; Zhao, Bo; Ismagilov, T. A.; Telin, A.G.

doi:10.2118/201824-ru

Cited by 3 publications

(2 citation statements)

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“…In this regard, at the first stage, the conformance control was performed using viscoelastic polyacrylamide rims with a chrome cross-linker, and only then the linear polyacrylamide slug was injected to align the mobility of displaced and displacing agents. The technology turned out to be very effective, which inspired the authors to develop a software product for modeling this process since the known programs were applicable only for pure polymer flooding [ 200 , 201 ]. Another modification of polymer flooding is the gel polymer flooding technology implemented at the Severnye Buzachi field (Kazakhstan) [ 201 , 202 , 203 ].…”

Section: Gels For Eormentioning

confidence: 99%

“…The technology turned out to be very effective, which inspired the authors to develop a software product for modeling this process since the known programs were applicable only for pure polymer flooding [ 200 , 201 ]. Another modification of polymer flooding is the gel polymer flooding technology implemented at the Severnye Buzachi field (Kazakhstan) [ 201 , 202 , 203 ]. This deposit has a very high oil viscosity (400–500 mPa·s) and a very large permeability heterogeneity.…”

Section: Gels For Eormentioning

confidence: 99%

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Application of Hydrogels and Hydrocarbon-Based Gels in Oil Production Processes and Well Drilling

Telin,

Lenchenkova,

Yakubov

et al. 2023

Gels

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The use of gels in oil production processes has become a regular practice in oilfield operations and is constantly developing in all oil-producing countries of the world, as evidenced by the growth of publications and patent activity on this topic. Many oil production processes, such as hydraulic fracturing, conformance control, water, and gas shutoff, cannot be imagined without the use of gel technologies. Inorganic, organic, and hybrid gels are used, as well as foams, gel-forming, and gel-dispersed systems. The possibility of a broad control of structural and mechanical properties, thermal stability, and shear resistance by introducing microscale and nanoscale additives made hydrogels and hydrocarbon-based gels indispensable tools for oil engineers.

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Section: Gels For Eormentioning

confidence: 99%

Section: Gels For Eormentioning

confidence: 99%

Application of Hydrogels and Hydrocarbon-Based Gels in Oil Production Processes and Well Drilling

Telin,

Lenchenkova,

Yakubov

et al. 2023

Gels

View full text Add to dashboard Cite

show abstract

Examination of literature on colloidal dispersion gels for oil recovery

Wang

Seright

2021

Petroleum Science

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Gas-Steam Composite Stimulation: A Strategy for a Heavy Oil Reservoir with High Water Cut in Kazakhstan

Guo

Hua

et al. 2022

Day 1 Tue, November 15, 2022

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North Buzachi field is structurally located in the western part of Ustyurt Basin on the edge of Caspian Sea in Kazakhstan. It's a heavy oil reservoir with viscosity nearly 400 mPa·s at 33°C. After nearly 20 years of cold-water flooding, the oil production has fallen sharply. Low sweep efficiency and high water cut come to be the main severe challenges at this stage. Ways to improve efficiency and productivity need to be tried and evaluated. Water shut off tests, polymer flooding and adjusting perforations have been tried, but with little success. Thermal enhanced oil recovery (EOR) methods generally are effective options and cyclic steam stimulation (CSS) was considered. But the high-water saturation and water cut make CSS get rapid economic decline after 1 or 2 cycle. Therefore, the feasibility of Gas-Steam Composite Stimulation (GSCS) on this field is studied and evaluated. This paper shows the prospect of GSCS in this reservoir by studying flow mechanisms and numerical simulation analysis. Gas-Steam Composite is a mixture of steam, carbon dioxide and nitrogen, which is produced based on a high-pressure jet combustion mechanism. The mixed components are simultaneously injected into the formation at the same pressure and temperature. GSCS has been tried in other similar oil fields (Mortuk oil field in Kazakhstan) before, and the actual production results are better than predicted. The application prediction of North Buzachi field was based on the previous theory and experience. During the GSCS progress, gas overlap occurs underground, resulting in secondary gas cap drive and higher reservoir pressure. Along with other synergistic effects, the oil rate can theoretically increase to 4-5 times of water flooding in North Buzachi field. By the results of numerical simulation, the upper residual oil was swept and the sweep efficiency increase from 14% to 40%. The daily oil production per well grows from the initial 3.5 t/d to 15 t/d. Compared with the final recovery of 12% by water flooding, the recovery may reach 33.4% after 7 cycles of GSCS. Meanwhile, the water cut declines from 97% to 50% and the average cyclic oil-steam ratio reaches 4.24. Economical evaluation shows that cost per ton of oil can be reduced by 24%. With the remarkable increase in production, more economic benefits can be achieved with GSCS technology. This study not only lays the groundwork for future pilot of GSCS in this field, but also provides a significant reference for the development of similar heavy oil reservoirs.

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Cyclical Gel-Polymer Flooding Technology is an Effective Method of Enhanced Oil Recovery in High-Viscosity Oil Fields (Russian)

Cited by 3 publications

References 0 publications

Application of Hydrogels and Hydrocarbon-Based Gels in Oil Production Processes and Well Drilling

Application of Hydrogels and Hydrocarbon-Based Gels in Oil Production Processes and Well Drilling

Examination of literature on colloidal dispersion gels for oil recovery

Gas-Steam Composite Stimulation: A Strategy for a Heavy Oil Reservoir with High Water Cut in Kazakhstan

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