Evaluation of shape memory polyurethane as a drilling fluid lost circulation and fracture plugging material

Lashkari, Reza; Tabatabaei‐Nezhad, Seyyed Alireza; Husein, Maen M.

doi:10.1016/j.geoen.2023.211445

Cited by 11 publications

(3 citation statements)

References 28 publications

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“…The more significant the stress relaxation effect is, the more obvious the self‐healing effect is. The epoxy content can be adjusted according to the formation plugging demand, so as to effectively control cementation process of the plugging zone 35 …”

Section: Resultsmentioning

confidence: 99%

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Novel smart plugging material for high‐temperature gas well

Li¹,

Zhou

Liu³

2023

Polymer Engineering & Sci

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A novel smart material is developed, which is synthesized by succinic anhydride, epoxy resin, and zinc acetylacetone hydrate. The smart material has excellent properties of self‐healing, shape memory, and degradation. The experimental results of performance characterization show that the material has good thermal stability. The glass transition temperature is adjustable between 100 and 120°C, and the storage modulus can reach 20 GPa. The maximum thermal expansion at 50°C is less than 15%, the thermal expansion equilibrium time at 120°C is less than 5 min, and the maximum thermal expansion is 131%. The stress relaxation time at 120°C is more than 2 h, which can slowly self‐heal on the basis of maintaining the mechanical strength. When the NaOH content is 1.5%, the degradation equilibrium can be reached in about 3 h, and the maximum degradation rate is 86%. The comprehensive performance evaluation shows that after hot rolling at 120°C/16 h, the material has no effect on the rheology and filtration properties. When plugging the fracture width of 5 × 4 mm, the pressure bearing capacity reaches 10 MPa. Its main mechanism is temperature‐sensitive expansion, and the stress relaxation effect heals and blocks the micro pore throat.

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Section: Resultsmentioning

confidence: 99%

“…The epoxy content can be adjusted according to the formation plugging demand, so as to effectively control cementation process of the plugging zone. 35…”

Section: Analysis Of Thermomechanical Performancementioning

confidence: 99%

Novel smart plugging material for high‐temperature gas well

Li¹,

Zhou

Liu³

2023

Polymer Engineering & Sci

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“…As shown in Table , the shape memory polymer can self-adjust the structure through temperature-sensitive expansion. However, due to the influence of T g , some particles expand rapidly before entering the fracture and lose the expansion filling effect. − Inert composites have excellent temperature resistance; however, their matching effect with fracture opening is subject to particle size optimization criteria, and the elastic deformation properties of some materials are relatively poor. The gel had good fluidity.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of a Biobased Temporary Plugging Material: Self-Healing and Degradable

Li,

Wen,

Liu

et al. 2023

ACS Omega

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Due to the low success rate in high-temperature gas well drilling or workover operations, a new type of biobased temporary sealing material was synthesized using vanillin, succinic anhydride (SA), cellulose, and acetylacetone zinc hydrate (AZH) as catalysts. Infrared analysis proved the synthesis of vanillin-derived epoxy and the formation of a vitrimer with hydroxyl ester. The results of thermodynamic properties tests show that it has excellent thermal stability with a high glass transition temperature (T g). The dynamic mechanical test results show that the characteristic relaxation time of the material at 120 °C is 3500 s and the self-healing rate can reach 61% within 20 min. The test results of mechanical properties show that under 10 MPa pressure, it has good elastic deformation performance, the rebound rate is more than 36%, and the crushing rate is less than 17%. The degradation performance results show that the decomposition increases to 80% under 120 °C and 1.2% NaOH. The comprehensive performance evaluation results show that the new temporary plugging material has good compatibility, and its plugging performance is better than those of a gel, composite material, and shape memory polymer. The maximum fracture plugging capacity is 5 × 4 mm, with a pressure up to 10 MPa.

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