Core–shell structure acrylamide copolymer grafted on nano-silica surface as an anti-calcium and anti-temperature fluid loss agent

Ma, Jingyuan; An, Yuxiu; Yu, Panxi

doi:10.1007/s10853-018-03239-0

Cited by 35 publications

(31 citation statements)

References 29 publications

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“…3 that the particle size of the gra copolymer is still in the nanometer domain, and still good for plugging and reducing uid loss. 33,34 3.1.3. Thermal stability of the ltrate reducer.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and properties of a high-performance environment-friendly micro–nano filtration reducer

et al. 2020

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Section: Resultsmentioning

confidence: 99%

Synthesis and properties of a high-performance environment-friendly micro–nano filtration reducer

et al. 2020

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“…The liquid was poured into the sample cup and raised to the marked line, and the readings were recorded from 600 to 300 rpm. The rheological parameters such as apparent viscosity (AV), plastic viscosity (PV), and yield point (YP) were calculated from the Ø600 (reading of 600 rpm) and Ø300 (reading of 300 rpm) values using the following formulas 50 , 51 …”

Section: Materials and Methodsmentioning

confidence: 99%

Experimental Study on the Polymer/Graphene Oxide Composite as a Fluid Loss Agent for Water-Based Drilling Fluids

Pang

Zhang

et al. 2021

ACS Omega

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The wellbore instability caused by the penetration of drilling fluids into the formation is a vital problem in the drilling process. In this study, we synthesized a polymer/graphene oxide composite (PAAN-G) as a fluid loss additive in water-based drilling fluids. The three monomers (acrylamide (AM), 2-acrylamide-2-methyl-1-propane sulfonic acid (AMPS), N -vinylpyrrolidone (NVP)) and graphene oxide (GO) were copolymerized using aqueous free radical polymerization. The composition, micromorphology, and thermal stability properties of PAAN-G were characterized by Fourier transform infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). According to the American Petroleum Institute (API) standards, the influence of PAAN-G on the rheological and filtration properties of bentonite-based mud was evaluated. Compared with PAAN, PAAN-0.2G has more stable rheological properties at high temperatures. The experimental results showed that even at a high temperature of 240 °C, PAAN-G can still maintain a stable fluid loss reduction ability. In addition, PAAN-G is also suitable for high-salt formations; it can still obtain satisfactory filtration volume when the concentration of sodium chloride (NaCl) and calcium chloride (CaCl 2 ) reached 25 wt %. Besides, we discussed the fluid loss control mechanism of PAAN-G through particle size distribution and scanning electron microscopy (SEM).

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“…Based on the API standard, it is reasonable that the fluid loss of drilling fluid is less than 20 mL after high-temperature aging. [47,48] Unlike the filtration control mechanism of conventional drilling fluid, the filtration control of CGA drilling fluid is the "dual effect" of microbub-bles and clay, see Figure 12a. Due to the low front pressure and flexible nature of aphrons, they will expand and aggregate before the base mud to fill the opening of the formation rapidly and rearrange themselves in the microfractures, thus avoiding loss of fluid into the formation, which is named "self-adjusting microbubble plugging."…”

Section: Filtration Propertiesmentioning

confidence: 99%

Grafted Starch Foam Stabilizer ESt‐g‐NAA for High‐Temperature Resistant CGA Drilling Fluid via Inverse Emulsion Polymerization

et al. 2021

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Colloidal gas aphron (CGA) drilling fluid is an environmentally friendly near-balanced drilling technology that has been successfully applied to depleted oil/gas reservoirs. To overcome the limitations of its application in high-temperature drilling, acrylamide (AM), 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS), and N-vinylpyrrolidone (NVP) are grafted onto starch via inverse emulsion polymerization, and a foam stabilizer ESt-g-NAA with a temperature resistance of ≥150°C is synthesized. The Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance ( 1 H-NMR) analysis suggest that all monomers are grafted onto starch efficiently. ESt-g-NAA has good solubility and thermal stability, as well as an excellent ability to stabilize foams at high temperatures. Based on microscopic observation, stable aphrons are generated successfully in the CGA drilling fluid prepared by ESt-g-NAA and surfactant after 150°C aged. Results show that ESt-g-NAA based CGA drilling fluid aged at appointed temperatures (120-180°C) is a high-performance drilling fluid with shear-thinning behavior, extremely high values of low shear rate viscosity (LSRV), and well-building capabilities.

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Core–shell structure acrylamide copolymer grafted on nano-silica surface as an anti-calcium and anti-temperature fluid loss agent

Cited by 35 publications

References 29 publications

Synthesis and properties of a high-performance environment-friendly micro–nano filtration reducer

Synthesis and properties of a high-performance environment-friendly micro–nano filtration reducer

Experimental Study on the Polymer/Graphene Oxide Composite as a Fluid Loss Agent for Water-Based Drilling Fluids

Grafted Starch Foam Stabilizer ESt‐g‐NAA for High‐Temperature Resistant CGA Drilling Fluid via Inverse Emulsion Polymerization

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