Gelation kinetics of PAM/PEI based drilling mud for lost circulation applications

Magzoub, Musaab; Shamlooh, Mohamed; Salehi, Saeed; Hussein, Ibnelwaleed A.; Nasser, Mustafa S.

doi:10.1016/j.petrol.2021.108383

Cited by 28 publications

(9 citation statements)

References 16 publications

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“…With a design viscosity of less than 30 cP, it was easy to inject the polymer solution to the target zone before the onset of crosslinking. Because of the presence of PEI, OCP offered longer gelation periods and thermal stability up-to 191 • C [40,47]. OCP proved more effective in controlling the vuggy porosity of the carbonate reservoir as compared to RSM which only had a near wellbore effect.…”

Section: Cantarell Field Mexicomentioning

confidence: 99%

“…Considerably significant control of gelation time has been established by crosslinking the polymer chains with a nanofiller which reduces its sensitivity to electrolytes and temperature [40]. Organic crosslinkers such as PEI and phenol have been applied as retarders to delay gelation for effective placement especially in deep reservoirs [47]. In one study [25], the advantageous gelation kinetics and success reports from field cases of PEI crosslinked polymer systems are discussed extensively.…”

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confidence: 99%

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Application of Polymer Based Nanocomposites for Water Shutoff—A Review

Obino

Yadav

2021

Fuels

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One highly undesirable characteristic of mature assets that inhibits oil recovery is high water production. Polymer gel treatment is a popular conformance improvement technique applied in this regard due to its cost effectiveness and proved efficiency. Despite this popularity, optimum performance of polymer hydrogels in water shut off is inhibited by excessive aggregation, difficulty in controlling gelation, and their instability at high temperature and high salinity reservoir conditions. To address these shortcomings, research on the application of nanoparticles (NPs) in polymer hydrogels to manage thermal stability and salinity sensitivity has significantly increased in the recent past. By incorporating metal-based NPs, silica or graphene at nanoscale; the gel strength, storage modulus, salinity tolerance and thermal stability of commonly used polymers have been greatly enhanced. In this paper, the advances in experimental studies on polymer-based nanocomposites are discussed and field experiences from adoption of polymer composites reviewed.

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Section: Cantarell Field Mexicomentioning

confidence: 99%

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confidence: 99%

Application of Polymer Based Nanocomposites for Water Shutoff—A Review

Obino

Yadav

2021

Fuels

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“…Additives, commonly mixed to formulate drilling fluids such as bentonite, are generally used with crosslinked polymers for different purposes, such as gel strengthening and retardation. [21,24] Using low concentrations of the PAM/AlAc would facilitate mixing drilling fluids additives because the viscosity remains in an acceptable range for field applications.…”

Section: Impact Of Bentonite On the Gelation Of Pam/alac Systemmentioning

confidence: 99%

Impact of aluminium acetate particles size on the gelation kinetics of polyacrylamide‐based gels: Rheological and molecular simulation study

et al. 2021

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Inorganically crosslinked polymers have been intensively implemented for conformance control treatments in oil and gas wells at low temperatures (<90°C) because of their faster gelation time compared to organically crosslinked gels. Crosslinkers such as chromium acetate are known to be toxic, and aluminium‐based alternatives have been introduced. This study aims to investigate the impact of aluminium acetate (AlAc) particle size on the gelation kinetics of polyacrylamide (PAM)‐based gels at a pH of 5 and temperature of 75°C. Moreover, bentonite is used as an additive to delay the crosslinking of PAM/AlAc gels. Reducing the particle size increases the specific surface area of the particles and provides more crosslinking sites. Therefore, lower PAM concentrations (up to 5 wt.%) could be used without AlAc settling. Using 7 wt.% PAM/1 wt.% AlAc with sizes of 25 and 48 μm revealed a crosslinking time of 17 and 115 min, respectively. The addition of bentonite at low crosslinker concentrations (0.5–1 wt.%) did not decrease the gel strength of 7 wt.% PAM/1 wt.% AlAc significantly. The gelation time was extended after adding 1 wt.% bentonite to the formulation where the delay was attributed to the adsorption of AlAc on the bentonite surface that was illustrated by molecular simulation.

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“…Subsurface cross‐linked gel has been proved effective in fractured formations plugging 15–20 . 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 anti‐erosion ability of drilling fluid and plugging capacity on fractures of different sizes.…”

Section: Introductionmentioning

confidence: 99%

“…Subsurface cross-linked gel has been proved effective in fractured formations plugging. [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.…”

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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Gelation kinetics of PAM/PEI based drilling mud for lost circulation applications

Cited by 28 publications

References 16 publications

Application of Polymer Based Nanocomposites for Water Shutoff—A Review

Application of Polymer Based Nanocomposites for Water Shutoff—A Review

Impact of aluminium acetate particles size on the gelation kinetics of polyacrylamide‐based gels: Rheological and molecular simulation study

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

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