Improving oil mechanism of polymer gel fracturing fluid based on filtration displacement

Xie, Kongliang; Mei, Jie; Cao, Weijia; Cao, Bao; Yao, Liming; Zhang, Baoyan; Wang, Haiguang; Guo, Kejin; Wu, Zhanqi; Yan, Kun; Lu, Xiaofeng; Wang, Kexin

doi:10.1016/j.petrol.2022.111030

Cited by 12 publications

(4 citation statements)

References 21 publications

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“…. Regions with T 2 relaxation times less than 10 m are defined as small pores, and regions with T 2 relaxation times greater than 10 m are defined as large pores (Xie et al, 2022). The T 2 spectrum of the initial stage and stage after well shut was entered into a computer image recognition program.…”

Section: Experimental Theorymentioning

confidence: 99%

Research on imbibition effect of surfactant fracturing fluid in offshore reservoirs with low permeability and high temperature

Liu,

Zou,

Lan

et al. 2023

Front. Energy Res.

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Surfactant imbibition can effectively improve the development effect of fracturing technique. In order to enhance oil recovery, a temperature resistant surfactant was selected using interfacial tension and contact angle testers based on the offshore reservoir conditions of high temperature and low permeability. Experiments on spontaneous and forced imbibition with artificial columnar cores were performed to optimize parameters of imbibition processes during fracturing in high temperature and low permeability reservoirs. Results show that among the three surfactants, amphoteric Gemini surfactant had a stable molecular structure with non-compressible hydrophobic groups which significantly reduced oil-water interfacial tension, enhanced rock wettability, and demonstrated good resistance to high temperatures The maximum recovery increase during amphoteric Gemini surfactant imbibition is 16.22%. The higher the core permeability, the higher the core inside pressure, and the longer the well shut-in time, the greater the forced imbibition effect. A proper well shut-in time and injection volume should be considered when using surfactant solution as fracturing liquid.

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Section: Experimental Theorymentioning

confidence: 99%

Research on imbibition effect of surfactant fracturing fluid in offshore reservoirs with low permeability and high temperature

Liu,

Zou,

Lan

et al. 2023

Front. Energy Res.

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“…Different from water drive reservoirs, as soon as water starts to produce, it does not play a role of driving force but will remarkably reduce the natural gas productivity. In tight water drive gas reservoirs, the measurements of fracturing are essential for later production-based accurate recoverable reserve data (Xie et al, 2022). Bottom water coning and edge water advancing make the water-gas ratio rise continuously (Wu et al, 2020;Qiu et al, 2023), and gas wells would stop pumping and producing due to wellbore accumulation, which seriously affects the gas well productivity, and the recovery rate is lower than that of constant volume gas reservoirs, as shown in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Review about evaluation methods of recoverable reserves of deep water drive gas reservoirs in China

Sun,

Dai,

Wang

et al. 2024

Front. Energy Res.

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It has been widely accepted that China is one of the biggest natural gas consumers. Related to the imports of LNG, China stands in a very uncomfortable situation. Most domestic gas reservoirs fall within deep water drive gas reservoirs inordinately, which has entered the production depletion stage. Accurate estimation of SEC recoverable reserves of deep water drive gas reservoirs is of great significance for gas consumption planning and peak shaving. The existing calculation methods of recoverable reserves mainly consist of static methods and dynamic methods. In the early stage of exploration and development, the volumetric method has often been utilized to calculate the recoverable reserves. With the continuous development of gas reservoirs, the main methods for evaluation are dynamic methods, including the successive subtraction of production method, water drive curve method, prediction model method, attenuation curve method, improved virtual curve method, and material balance method for deep gas reservoirs.

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“…Fracturing operations are profoundly impacted by the efficacy of fracture length and inflow capacity, both intricately linked to the attributes and functional requisites of fracturing fluids [ 10 , 11 , 12 ]. The most widely used water-based fracturing fluids encompass various types, including slickwater fracturing fluids [ 13 ], clean fracturing fluids [ 14 ], and gel fracturing fluids [ 15 ]. While slickwater fracturing fluids excel in drag reduction, their temperature resistance and sand-carrying capacity might be restricted [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Development and Gelation Mechanism of Ultra-High-Temperature-Resistant Polymer Gel

Ma,

Zhao,

Yang

et al. 2023

Gels

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To expand the applicability of gel fracturing fluids in ultra-high-temperature reservoirs, a temperature-resistant polymer was synthesized using the solution polymerization method. Subsequently, an ultra-high-temperature-resistant polymer gel was formulated by incorporating an organic zirconium crosslinking agent. A comprehensive investigation was carried out to systematically study and evaluate the steady shear property, dynamic viscoelasticity, and temperature and shear resistance performance, as well as the core damage characteristics of the polymer gel. The obtained results demonstrate that the viscosity remained at 147 mPa·s at a temperature of 200 °C with a shear rate of 170 s−1. Compared with the significant 30.9% average core damage rate observed in the guanidine gum fracturing fluid, the core damage attributed to the polymer gel was substantially mitigated, measuring only 16.6%. Finally, the gelation mechanism of the polymer gel was scrutinized in conjunction with microscopic morphology analysis. We expect that this study will not only contribute to the effective development of deep and ultradeep oil and gas reservoirs but also furnish a theoretical foundation for practical field applications.

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Improving oil mechanism of polymer gel fracturing fluid based on filtration displacement

Cited by 12 publications

References 21 publications

Research on imbibition effect of surfactant fracturing fluid in offshore reservoirs with low permeability and high temperature

Research on imbibition effect of surfactant fracturing fluid in offshore reservoirs with low permeability and high temperature

Review about evaluation methods of recoverable reserves of deep water drive gas reservoirs in China

Development and Gelation Mechanism of Ultra-High-Temperature-Resistant Polymer Gel

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