Rheology of a New Gel Used for Severe Lost Circulation Control

Nie, Xu; Luo, Pinya; Wang, Pingquan; Zhang, Xinmin; Yang, Li

doi:10.2523/132136-ms

Cited by 4 publications

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Preparation of High Temperature Resistant High Strength Supramolecular Gels Based on Hydrophobic Association and Hydrogen Bonding and its Application in Formation Pluggingg

Yang

Bai

Sun

et al. 2023

SPE Western Regional Meeting

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The traditional chemical cross-linking method is based on the formation of covalent bonds between molecules to connect three-dimensional networks to enhance the strength of hydrogels. Although this method can significantly improve the mechanical properties, it also has many problems, such as irreversibility and fatigue. Therefore, the design and preparation of supramolecular hydrogels with high mechanical properties and good temperature resistance have very important research significance and practical value. This paper prepared a supramolecular gel with both temperature resistance and mechanical properties through hydrophobic association and hydrogen bonding, and evaluated its thermal stability, rheology, temperature resistance and pressure plugging ability. The results showed that the supramolecular gel had excellent thermal stability, and there was strong physical entanglement between its three-dimensional network structures, which made it difficult to be destroyed by increasing temperature. The excellent rheological properties of supramolecular gels enable them to maintain good viscoelastic changes in the linear viscoelastic region within the strain range of 0.1-30%. When the strain was greater than 30%, the supramolecular gel began to undergo different degrees of sol-gel phase transition, which showed that the energy storage modulus of supramolecular gel decreased. In addition, the energy storage modulus of supramolecular gel was always greater than the loss modulus in the whole frequency scanning range, and there was no intersection between the two gel and the gel always showed high elasticity. Meanwhile, the supramolecular gel still had good structure and strength after high temperature aging. Its tensile and compressive properties did not change significantly, but the color of the gel surface changed slightly, which could maintain good structural stability under high temperature environment. Supramolecular gel particles could be used as plugging materials for drilling fluid, and had excellent plugging ability of formation fractures and pores. The plugging ability of 1mm aperture plate model was up to 6.3MPa, and the plugging ability of 1mm seam width was up to 4.9MPa. Therefore, the development and application of supramolecular gel plays an important supporting role in drilling fluid plugging.

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Preparation of High Temperature Resistant High Strength Supramolecular Gels Based on Hydrophobic Association and Hydrogen Bonding and its Application in Formation Pluggingg

Yang

Bai

Sun

et al. 2023

SPE Western Regional Meeting

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Breakthrough Solutions for Lost Circulation Control in Oilfield Drilling: Unleashing the Power of Biopolymer Modified Graphene and CaCO3 synergy

Ahmad,

Kamal,

Murtaza

et al. 2024

All Days

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Lost circulation is a common problem encountered during drilling operations, where drilling fluids escape from the wellbore into the surrounding geological formations, resulting in reduced drilling efficiency and increased costs. Conventional lost circulation materials (LCMs) like calcium carbonate (CaCO3), mica, ground walnut shells, fibrous materials, and cross-linking agents are usually added to drilling fluids to plug the lost circulation zone. Further, nanoparticles, such as graphene and carbon nanotubes, offer a new generation of solutions for controlling fluid loss into lost circulation zones. The particle size distribution of LCMs, their stability, and dispersion play a significant role in controlling losses. The combination of LCMs and nanoparticles can provide a synergistic effect for lost circulation control. In this study, a mix of biopolymer-modified graphene and CaCO3 is proposed as a potential solution for lost circulation control that combines the unique properties of biopolymer, graphene, and CaCO3. The potential of the novel solution was investigated by conducting rheology and fluid loss tests. Their synergistic effect was investigated by incorporating them in different concentrations in drilling fluid and the optimum concentration was chosen based on rheology and fluid loss results. Experimental observations revealed that the combination of biopolymer-modified graphene and CaCO3 resulted in the formation of a durable and impermeable mud cake on the wellbore wall, effectively bridging the lost circulation zone. This innovative approach significantly reduces fluid loss in comparison to the conventional use of CaCO3 alone. By filling the nanopores of the CaCO3 bridge, the modified graphene contributes to a robust and reliable lost circulation control solution. Moreover, the inclusion of modified graphene improves the rheological properties of the drilling fluid, facilitating easier pumping and enhancing its capacity to suspend CaCO3 and other weighting materials. The proposed solution is biodegradable, environmentally friendly, and can withstand HPHT conditions, making it a viable option for real drilling conditions.

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Types and Performances of Polymer Gels for Oil-Gas Drilling and Production: A Review

Lei

Sun

et al. 2022

Gels

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Polymer gels with suitable viscoelasticity and deformability have been widely used for formation plugging and lost circulation control, profile control, and water shutoff. This article systematically reviews the research progress on the preparation principle, temperature resistance, salt resistance, and mechanical properties of the ground and in situ crosslinked polymer gels for oil-gas drilling and production engineering. Then, it comparatively analyzes the applicable conditions of the two types of polymer gel. To expand the application range of polymer gels in response to the harsh formation environments (e.g., high temperature and high salinity), we reviewed strategies for increasing the high temperature resistance, high salt resistance, and rheological/mechanical strengths of polymer gels. This article provides theoretical and technical references for developing and optimizing polymer gels suitable for oil-gas drilling and production.

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Rheology of a New Gel Used for Severe Lost Circulation Control

Cited by 4 publications

References 0 publications

Preparation of High Temperature Resistant High Strength Supramolecular Gels Based on Hydrophobic Association and Hydrogen Bonding and its Application in Formation Pluggingg

Preparation of High Temperature Resistant High Strength Supramolecular Gels Based on Hydrophobic Association and Hydrogen Bonding and its Application in Formation Pluggingg

Breakthrough Solutions for Lost Circulation Control in Oilfield Drilling: Unleashing the Power of Biopolymer Modified Graphene and CaCO3 synergy

Types and Performances of Polymer Gels for Oil-Gas Drilling and Production: A Review

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