An Innovative EOR Theory for The Target of 70% Recovery Factor—Synchronous Diversion-Flooding Technology Mechanism and Verification by Physical Modeling and Pilot Test

Wu, Xingcai; Meng, Qingchun; Xiong, Chao; Sun, Zhe; Yuan, Liang; Lu, Xiaofeng; Cheng, Shirui; Jia, Xu; Tian, Xiumei

doi:10.2523/18642-ms

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…This technique can effectively sweep the whole flow field through a process of temporary plugging-passing-turning-plugging-passing of a large number of SMG in the whole reservoir [ 25 , 26 , 27 ]. This technology has been used in many reservoirs with different temperatures (28–126 °C), different viscosities (4–165 mPa·s), different salinities (2000–20 × 10 4 mg/L), different water-cuts (80–98%), and different production degrees (14–48%) in North China, Xinjiang, Liaohe, Qinghai, Dagang, and so on, and it has achieved obvious results [ 28 , 29 , 30 , 31 , 32 , 33 ]. However, the oil displacement mechanism of SMG is not clear enough, and the exact matching between SMG and reservoirs is lacking.…”

Section: Introductionmentioning

confidence: 99%

Study on Micro-Displacement Mechanism and Reservoir Compatibility of Soft Dispersed Microgel

Liu

Guan

et al. 2023

Gels

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Polymer flooding is a key technology for improving reservoir heterogeneity around the world, and it has made great progress. However, the traditional polymer has many shortcomings in the theory and application, which causes the efficiency of polymer flooding to gradually decrease and secondary reservoir damage after a long period of polymer flooding. In this work, a novel polymer particle (soft dispersed microgel, SMG) is used as the research object to further investigate the displacement mechanism and reservoir compatibility of SMG. The visualization experiments of the micro-model prove that SMG has excellent flexibility and can be highly deformable to realize deep migration through the pore throat smaller than SMG itself. The visualization displacement experiments of the plane model further show that SMG has a plugging effect, which makes the displacing fluid flow into the middle and low permeability layers, improving the recovery of these layers. The compatibility tests show that the optimal permeability of the reservoir for SMG-μm is 250–2000 mD, and the corresponding matching coefficient range is 0.65–1.40. For SMG-mm−, its corresponding optimal permeabilities of reservoir and matching coefficient are 500–2500 mD and 1.17–2.07, respectively. The comprehensive analysis demonstrates that the SMG has excellent ability of the water-flooding swept control and compatibility with reservoirs, having the potential to solve the problem of traditional polymer flooding.

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Section: Introductionmentioning

confidence: 99%

Study on Micro-Displacement Mechanism and Reservoir Compatibility of Soft Dispersed Microgel

Liu

Guan

et al. 2023

Gels

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“…Furthermore, it has the strong ability to resist temperature resistance and salinity. Up to now, waterflooding sweep control technology based on SMG has not only achieved good results in many sandstone and conglomerate oilfields in China but also achieved remarkable success in a carbonate oilfield in the Middle East [17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on a Novel Particle Polymer for Enhanced Oil Recovery in High Temperature and High Salinity Reservoirs

Liu

Zhang

et al. 2021

Journal of Chemistry

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Conventional polymer flooding include polymer flooding, surfactant-polymer flooding (SP), alkaline-surfactant-polymer flooding (ASP), and crosslinked polymer gel flooding. However, these technologies in oilfield, especially in high temperature and high salinity, are limited due to the poor ability of temperature and salinity resistance of polymer. In this work, a novel polymer particle (soft microgel, SMG) is used as the research object under the reservoir condition of high salinity (20 × 104 mg/L) to evaluate the physical and chemical properties of submillimeter-scale SMG and the effect of profile control and oil displacement. The investigation of the physical and chemical properties of submillimeter-scale SMG shows that it has the characteristics of low viscosity, easy injection, good plugging property, swelling property, rheological property, and excellent thermal stability. After 6 months of high temperature and high salinity aging, there is no hydration and hydrolysis of submillimeter-scale SMG as the traditional polymers under high temperature and high salinity. The parallel two-core flooding experiments indicate that the submillimeter-scale SMG has a better effect of profile control and oil displacement, which increases the fraction flow rate( f w ) of low-permeability core from 5.12% before SMG-flooding to 85.29% and the total increase of recovery as high as 14.07%. The comprehensive analysis demonstrates that the submillimeter-scale SMG has the potential to solve the problem that the polymer flooding cannot be applied to the high temperature and high salinity reservoir, and it is also expected to improve the uneven waterflooding in the reservoir.

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An Innovative EOR Method for Waterflooding Heterogeneous Oilfield ---- Graded Diversion-Flooding Technology and Verification by Field Comparison Tests (Russian)

et al. 2017

SPE Russian Petroleum Technology Conference

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An Innovative EOR Theory for The Target of 70% Recovery Factor—Synchronous Diversion-Flooding Technology Mechanism and Verification by Physical Modeling and Pilot Test

Cited by 4 publications

References 14 publications

Study on Micro-Displacement Mechanism and Reservoir Compatibility of Soft Dispersed Microgel

Study on Micro-Displacement Mechanism and Reservoir Compatibility of Soft Dispersed Microgel

Experimental Investigation on a Novel Particle Polymer for Enhanced Oil Recovery in High Temperature and High Salinity Reservoirs

An Innovative EOR Method for Waterflooding Heterogeneous Oilfield ---- Graded Diversion-Flooding Technology and Verification by Field Comparison Tests (Russian)

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