The Blocking Properties of Styrene-Styrene Sulfonic Acid Sodium Salt Copolymer as a Nanodispersing Agent in Water-Based Drilling Fluids

Fang, Junwei; Fan, Li; Zhang, Jun; Deng, Mingyi; Xie, Gang

doi:10.1007/s10553-021-01230-1

Cited by 2 publications

(1 citation statement)

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“…The swelling performance of the plugging agent was mainly expressed by its water swelling degree [ 29 ]. The mass of the plugging agent before water absorption was recorded as m 0 , and the mass after water absorption was recorded as m , the water swelling degree was C , and the water swelling degree of the plugging agent was calculated by Equation (1):

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Section: Methodsmentioning

confidence: 99%

Preparation, Characterization, and Performance of a Modified Polyacrylamide-Sericite Gel

et al. 2023

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In this study, a modified chemical plugging agent is prepared with the aim to reduce the well moisture content and improve the efficiency of oilfield development. In comparison to other chemical plugging agents, the composite gels plugging agents have excellent blocking capacity and erosion resistance. In this study, optimal conditions for the preparation of plugging agents were explored. The results showed that the performance of polyacrylamide-sericite (PAM-sericite) gel improved at a polymerization temperature of 60 °C, a crosslinker concentration of 0.5%, an initiator concentration of 0.75%, an acrylamide concentration of 10.0%, and a sericite concentration of 10.0%. The characterization of PAM-sericite gel showed a certain fold-like shape with a smoother surface, indicating that the doped sericite makes the plugging agent more compact and firm. It was also found that the blocking ratio of the plugging agent can potentially reach 99.5% after the addition of sericite. Moreover, failure stress of the skeleton structure and the water swelling degree were increased by 63.5% and 51.2%, respectively. Additionally, long-term stability, temperature resistance, pressure resistance and pressure stability also showed improvement to varying degrees. It was concluded that this gel has better stability against different kinds of salt solutions and is not affected by particle size.

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Section: Methodsmentioning

confidence: 99%