Source Analysis and Countermeasure Research of Sand Production after Hydraulic Fracturing in Tight Sandstone Gas Reservoir

Peng, Huan

doi:10.2113/2022/8342062

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…The Effect of Proppant Pumping Schedule on the Law of Proppant Settlement. In order to meet the needs of the reservoir stimulation, slope sand and slug slope sand pumps are selected to inject the proppant schedule [13,14]. Thus, we researched the effect of the proppant pumping schedule on the law of proppant settlement with the condition of the same total proppant dose and pumping rate, and the pumping rate in the experiment was 60 L/min.…”

Section: The Effect Of Proppant Bulk Density On the Law Of Sandmentioning

confidence: 99%

“…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%

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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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Section: The Effect Of Proppant Bulk Density On the Law Of Sandmentioning

confidence: 99%

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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“…Jirout and Jiroutová 19 conducted systematic experiments and calculated the correlation between the hindered settling velocity of a cloud of non-isometric particles and a high-viscosity and pseudoplastic liquid. Peng et al 20 conducted experimental studies on proppant flowback control using fibers of varying lengths. A series of laboratory evaluations were designed to quantify the effectiveness of fibers on proppant flowback control.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Proppant Settling Velocity in Fiber-Containing Fracturing Fluids

Bai,

2023

ACS Omega

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Hydraulic fracturing is the main stimulation method in the development of oil and gas fields. It is helpful to predict the fracture support effect during fracturing by calculating the settling velocity of particles in the fracturing fluid. Experimental research shows that fibers mixed into the fracturing fluid can improve the performance of suspended sand. In this study, fiber was considered a solvent in the fracturing fluid, and the constitutive model of the fiber-containing fracturing fluid was modified according to the fluid rheology. From the analysis of the mechanical behavior in the fibercontaining fluid, the settling velocity of particles slowed down because of some reasons. First, the viscosity of the fiber-containing fracturing fluid increased significantly. The other mechanism is the resistance mechanism of the fiber acting on the particle. The apparent viscosity was fitted based on the rheological model and the measurements. Then, the drag coefficient model of the settling particles was built according to the rheological data of the fibrous fluid. A semi-empirical model was developed to predict the terminal settling velocity through research on dynamics. By characteristic analysis of the results, we found that the fiber on the settling velocity is closely related to the concentration of the base fluid. This prediction model is suitable for the base fluid and fiber-containing fracturing fluid, and the average relative difference between the prediction model and measurements was acceptable.

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Improved Plating Adhesion of Polyarylate Fibers via Supercritical CO2 and Impregnation of Slightly Soluble Oil on the Fiber Surface

Sakai,

Tabata,

Hori

et al. 2024

Fibers Polym

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There is a growing demand for conductive fibers with high bending resistance, particularly for applications, such as smart textiles and robot arms. The amount of fiber for such applications can be reduced using high-performance fibers with high tensile properties, such as polyaramid and polyarylate Vectran®). However, because such fibers are crystalline with rigid molecular structures, they poorly adhere to plated films; thus, the plated fibers exhibit poor bending fatigue resistance. To solve this problem, in this study, we expanded polyarylate fiber using supercritical CO2 (ScCO2) and impregnated it with a metal complex (palladium acetate), which acts as a catalyst for electroless plating to induce an anchoring effect. However, because polyarylate fiber has an extremely low polarity, it is difficult to uniformly impregnate it with many metal complexes, even with ScCO2. Generally, an organic solvent is added to tune the polarity of supercritical CO2; however, the metal complex penetrates the fiber, thereby reducing the amount of metal complex near the fiber surface. Therefore, we tuned the polarity of the surface by applying various oils to the fiber surface. The sample electroplated in ScCO2 with oil applied to its surface showed the highest bending fatigue resistance, followed by that treated in ScCO2 without oil, and the sample treated in an aqueous solution showed the lowest. Furthermore, we measured the interfacial adhesion strength of the samples using the microdroplet method, and the same trend was observed.

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Source Analysis and Countermeasure Research of Sand Production after Hydraulic Fracturing in Tight Sandstone Gas Reservoir

Cited by 5 publications

References 28 publications

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

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

Prediction of Proppant Settling Velocity in Fiber-Containing Fracturing Fluids

Improved Plating Adhesion of Polyarylate Fibers via Supercritical CO2 and Impregnation of Slightly Soluble Oil on the Fiber Surface

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