Enhanced hydrophobically modified polyacrylamide gel for lost circulation treatment in high temperature drilling

Xie, Binqiang; Ma, Jiang; Wang, Yun; Tchameni, Alain Pierre; Luo, Mingwang; Wen, Jiantai

doi:10.1016/j.molliq.2020.115155

Cited by 31 publications

(16 citation statements)

References 29 publications

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“…PEI is an efficient high-temperature crosslinker because it can undergo the transamidation reaction with AM-based polymers, forming high-strength covalent bonds [ 31 ]. Xie et al prepared a hydrophobically modified PAM polymer, HMP, by micellar copolymerization using AM, octadecyl acrylate (OA), and AMPS as the raw materials, where OA increased the rigidity of the polymer molecular chains and AMPS enhanced the temperature resistance of the molecular chains, crosslinking it with PEI to prepare a temperature-resistant gel as a lost circulation control agent HMP-Gel ( Figure 2 ) [ 32 ]. This gel exhibited a controllable gelation time in the temperature range of 100–150 °C and showed an excellent plugging effect on carbonate formations [ 32 ].…”

Section: Types Of Polymer Gels Used For Oil-gas Drilling and Productionmentioning

confidence: 99%

“…Xie et al prepared a hydrophobically modified PAM polymer, HMP, by micellar copolymerization using AM, octadecyl acrylate (OA), and AMPS as the raw materials, where OA increased the rigidity of the polymer molecular chains and AMPS enhanced the temperature resistance of the molecular chains, crosslinking it with PEI to prepare a temperature-resistant gel as a lost circulation control agent HMP-Gel ( Figure 2 ) [ 32 ]. This gel exhibited a controllable gelation time in the temperature range of 100–150 °C and showed an excellent plugging effect on carbonate formations [ 32 ]. In addition to the AM-based polymers, polysaccharide polymers (e.g., starch, guar gum, and xanthan gum) and their modified derivatives have been used to prepare many types of gels, and these gels are environmentally friendly but have lower temperature resistance and gel strength than AM-based gels [ 5 ].…”

Section: Types Of Polymer Gels Used For Oil-gas Drilling and Productionmentioning

confidence: 99%

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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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Section: Types Of Polymer Gels Used For Oil-gas Drilling and Productionmentioning

confidence: 99%

Section: Types Of Polymer Gels Used For Oil-gas Drilling and Productionmentioning

confidence: 99%

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

Lei

Sun

et al. 2022

Gels

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“…If the G 0 is greater than G 00 , the gel has good elasticity and exhibits solid properties. [35][36][37] The rheological curves of oil-based gel prepared of different gelling agent concentration and aging time is shown in Figure 14. When the frequency is in the range of 0.1-2 Hz, the G 0 and G 00 of gel both have a sharp increase trend with the increase of frequency; And when the frequency exceeds 2 Hz, the increasing trend becomes gentle, and basically stable after 10 Hz.…”

Section: Rheological Propertymentioning

confidence: 99%

“…[15][16][17][18][19][20] When the gel solution is pumped into the formation, it can gelatinize in the fracture space regardless of the fracture factors such as the size, shape, and roughness, forming a gel with no fluidity and strong retention ability, which has strong antierosion ability of drilling fluid and plugging capacity on fractures of different sizes. For example, Xie designed a new cross-linked modified hydrophobic polyacrylamide gel (HMP-Gel), 21 in which octadecyl acrylate was introduced to improve the structural strength of the gel, maintaining good plugging performance and controllable gelation time at 150 C; Deng prepared a cross-linked polymer gel using acrylamide as monomer, in which the initiator was encapsulated by thermoplastic resin. 22 After entering the formation, the resin softens and decomposes, releasing the initiator, which achieves the purpose of controlling the gelation time.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on an oil‐based polymer gel for lost circulation control in high‐temperature fractured formation

Qiu

Bai

Sun

et al. 2021

J of Applied Polymer Sci

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Aiming at the lack of plugging agent for oil‐based drilling fluid leakage in fractured formation, an oil‐based gel‐plugging agent with high structural strength and strong thermal stability was synthesized based on monomer polymerization and crosslinking. According to the preparation experiment, when the total concentration of methyl methacrylate (MMA) and butyl acrylate (BA) is 30% and the ratio is 6:4, the oil‐based gel solution can be completely gelatinized from 80 to 200°C, which has high gel strength and controllable gelation time. The effects of total concentration of BA and MMA, the ratio of BA and MMA, synthesis temperature, oil‐based drilling fluid invasion, shear effect, and fiber concentration on gelling performance were systematically studied. Fourier transform infrared molecular structure analysis showed that the oil‐based gel contained benzene ring group and ester characteristic group. From the rheological properties of oil‐based gel with 30% gelling agent at 160°C, it could be seen that the elastic modulus G′ of 10 Hz is 232 kPa, which is much larger than the storage modulus G″ is 99 kPa, which reflects the solid properties and has good elasticity and high strength. The displacement experiment of sand filling pipe and dynamic and static plugging experiment of high temperature and high pressure shows that the oil‐based gel has high bearing capacity in fractures and sand filling pipe. The bearing pressure is 3.01 MPa in 6 mm fractures, and the bearing pressure gradient is 0.602 MPa/cm.

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“…For example, the thermal stability of PAM can endure a temperature below 175 °C, according to Europe et al [6]. However, Xie et al [7] reported a detrimental effect on drilling performance when the incline of temperature with the excessive hydrolysis in the polymer. In this study, the temperature of drilling fluid was investigated from ambient conditions to 80 °C due to safety concerns on the laboratory scale and the boiling point of water acting as the heating base of fluid.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of pH and temperature on rheological behaviour between Polyacrylamide (PAM) and its modified PAM

et al. 2022

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Drilling waste is a problem that affects the environment, society, and health. However, the rheological additive in drilling fluid is the source of the generation of drilling waste. Hence, a suitable rheological additive became a concern in bored pile construction. Conventional bentonite has been replaced by the usage of polymer in drilling operations, this is due to the operational, environmental, and economic aspects. Unlike bentonite, polyacrylamide (PAM) has a high molecular weight, good gelling behaviour, and is eco-friendly. However, there are limitations of PAM in terms of thermal stability and pH sensitivity. Therefore, the conventional polymer-based drilling fluid requires the hybridisation of functionalised material. In this paper, PAM with its enhancement is needed for water-based drilling through modification using silica (SiO2) and sodium dodecyl sulphate (SDS). The paper presented a comparative analysis of rheological behaviour between polyacrylamide (PAM) and modified PAM. This research involved the influence of temperature (ambient to 80 °C) and pH (9 and 10). Results revealed that modified PAM performed better at 40 °C and pH 10. Furthermore, PAM and modified PAM had a better rheological performance at pH 10. Future studies can demonstrate the modified PAM as the drilling fluid in the bored pile construction to investigate the frictional resistance of the drilling fluid.

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Enhanced hydrophobically modified polyacrylamide gel for lost circulation treatment in high temperature drilling

Cited by 31 publications

References 29 publications

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

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

Experimental study on an oil‐based polymer gel for lost circulation control in high‐temperature fractured formation

A comparative study of pH and temperature on rheological behaviour between Polyacrylamide (PAM) and its modified PAM

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