Applicable conditions and analytical corrections of plane strain assumption in the simulation of hydraulic fracturing

Zhao, Jinzhou; Peng, Yu; Li, Yongming; Tian, Zhisheng

doi:10.1016/s1876-3804(17)30052-6

Cited by 14 publications

(4 citation statements)

References 6 publications

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“…Thereby, it is considered that the stress difference between the target layer and the upper and lower spacers [29,30], the viscosity of fracturing fluid [31], and the fracturing displacement [32] are the relevant factors affecting vertical fracture propagation. However, the correlation among them has not been fully clarified [33][34][35][36]. In this article, a numerical fracture propagation model is established to study the hydraulic fracture propagation law of deep tight sandstone under different interlayer stress difference, fracturing construction displacement and fracturing fluid viscosity on the basis of comprehensive analysis of the geological characteristics, development status and low efficiency of stimulation and reconstruction of low permeability reservoir in Northeast Sichuan.…”

Section: Introductionmentioning

confidence: 99%

Gas-Water Production of a Continental Tight-Sandstone Gas Reservoir under Different Fracturing Conditions

Liu,

Sun,

Wang

et al. 2024

FDMP

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A numerical model of hydraulic fracture propagation is introduced for a representative reservoir (Yuanba continental tight sandstone gas reservoir in Northeast Sichuan). Different parameters are considered, i.e., the interlayer stress difference, the fracturing discharge rate and the fracturing fluid viscosity. The results show that these factors affect the gas and water production by influencing the fracture size. The interlayer stress difference can effectively control the fracture height. The greater the stress difference, the smaller the dimensionless reconstruction volume of the reservoir, while the flowback rate and gas production are lower. A large displacement fracturing construction increases the fracture-forming efficiency and expands the fracture size. The larger the displacement of fracturing construction, the larger the dimensionless reconstruction volume of the reservoir, and the higher the fracture-forming efficiency of fracturing fluid, the flowback rate, and the gas production. Low viscosity fracturing fluid is suitable for long fractures, while high viscosity fracturing fluid is suitable for wide fractures. With an increase in the fracturing fluid viscosity, the dimensionless reconstruction volume and flowback rate of the reservoir display a non-monotonic behavior, however, their changes are relatively small.

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Section: Introductionmentioning

confidence: 99%

Gas-Water Production of a Continental Tight-Sandstone Gas Reservoir under Different Fracturing Conditions

Liu,

Sun,

Wang

et al. 2024

FDMP

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“…The fracture network system can "break up" the effective reservoir where seepage can take place, maximize the contact area between the fractures and the reservoir, and increase the volume of the reservoir stimulation as much as possible. It enables the shortest percolation distance of oil and gas from the matrix in any direction to the fracture; dramatically improves the overall permeability of the reservoir; realizes a comprehensive transformation of the reservoir in the three-dimensional direction of length, width, and height; increases the percolation area and inflow capacity; and improves the initial production and final recovery [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study for the Effects of Different Factors on the Sand-Carrying Capacity of Slickwater

Peng

Liu³

et al. 2023

Geofluids

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With the continuous exploration and development of unconventional oil and gas reservoirs, volume fracturing technology becomes one of the necessary measures for developing shale gas and tight sandstone gas reservoirs effectively. Volume fracturing technology usually uses slickwater and drag-reducing agent as the core of the fracturing system. The composition of the fracturing system is the main factor determining its performance. Polyacrylamide has many amide groups in its main chain, high activity, and controllable performance, often in solid powder and liquid emulsion states. Furthermore, polyacrylamide which is the water-soluble drag-reducing agent is most widely used in applying current shale gas slickwater fracturing operations. Due to the low viscosity and poor sand-carrying capacity of slickwater, proppant easily settles at the bottom of hydraulic fractures. This phenomenon influences the stimulation effect of volume fracturing. Therefore, the law of sand carrying and placement of proppant in hydraulic fractures in volume fracturing plays an essential role in determining the success of the stimulation effect of volume fracturing. Through the visualization device of proppant transport in the fracture, the settlement of proppant in the fracture was studied experimentally. And through experimental equipment, the effects of different operation pumping rates, liquid viscosity, proppant type, and proppant pumping schedule on the stimulation effect were studied. The experimental results can provide strong support for volume fracturing into well material optimization and operation parameter optimization for unconventional oil and gas reservoirs.

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“…Supercritical CO 2 has been employed as a working fluid in various theoretical and experimental studies in petroleum engineering (Nikolai et al, 2019;Peng et al, 2019), and it can be used to displace oil. Supercritical CO 2 hydraulic fracturing is regarded as one of the most environmentally benign fracturing technologies since it has several benefits in reservoirs (Zhao et al, 2017;Hazarika and Boruah, 2022), particularly for watersensitive formations (Liu et al, 2014), low pressure reservoirs, and water-stressed regions (Cao et al, 2017). Although it is well known that supercritical CO 2 has many advantages over waterbased fracturing fluid, the majority of the work is still done on shale (Jiang et al, 2016;Jia et al, 2018;Memon et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the mechanism of supercritical CO2 interaction with tight sandstone

Peng¹,

Yang²,

Peng³

et al. 2022

Front. Energy Res.

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One of the important technologies for combating global climate change is CCUS (Carbon Capture, Utilization, and Storage), which aims to address the issue of “greenhouse effect” generated by a significant amount of greenhouse gas emissions. Supercritical CO2, a new type of anhydrous fracturing fluid with broad application prospects in low-pressure tight sandstone gas reservoirs, has several advantages over traditional water-based fracturing fluids, including quick flowback, minimal damage to the reservoir, and the ability to realize in-situ storage of greenhouse gases. The tight sandstone cores from the Jinqiu Gas field in the Sichuan Basin were used in an experimental investigation on the interaction mechanism between supercritical CO2 and tight sandstone to examine the viability of supercritical CO2 fracturing with tight sandstone, and analysis of the samples’ post-reaction samples’ mineral composition, microstructure, mass change, and total salinity change. The interaction of tight sandstone with supercritical CO2 results in an increase in quartz content, a decrease in clay mineral content, the formation of new minerals, and partial mineral dissolution on the surface of the sample. Since the degree of mineral dissolution of sandstone samples increases with time, CO2 can be stored in tight sandstone as carbonate minerals. This study evaluates how supercritical CO2 interacts with tight sandstone and can offer a solid theoretical foundation and experimental evidence in favor of CO2in-situ storage in tight sandstone gas reservoir.

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Applicable conditions and analytical corrections of plane strain assumption in the simulation of hydraulic fracturing

Cited by 14 publications

References 6 publications

Gas-Water Production of a Continental Tight-Sandstone Gas Reservoir under Different Fracturing Conditions

Gas-Water Production of a Continental Tight-Sandstone Gas Reservoir under Different Fracturing Conditions

Experimental Study for the Effects of Different Factors on the Sand-Carrying Capacity of Slickwater

Experimental investigation of the mechanism of supercritical CO2 interaction with tight sandstone

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