Performance Evaluation and Field Application of Nano Plugging Agent for Shale Water-Based Drilling Fluid

In this paper, nano plugging agent AMPS/AM was prepared, and its plugging performance was evaluated by a microfracture simulation experiment and a shale pressure resistance experiment. The pressure loss decreased by 66.09% compared with the top pressure of 6.9 MPa, and the average core indentation h...

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Bibliographic Details
Published in:Energies (Basel) 2022-10, Vol.15 (20), p.7529
Main Authors: Jing, Minjia, Yuan, Zhiping, Li, Xiaoyang, Huang, Jinjun, Tian, Yuexin
Format: Article
Language:English
Subjects:
Analysis
Bacteria
Blocking
Drilling
Drilling and boring
Drilling fluids
Drilling muds
Experiments
Fluids
Heat resistance
High temperature
Hydration
Indentation
long horizontal section horizontal well
Methods
Microfracture
Mud
nano plugging agent
Nanoparticles
Particle size
Performance evaluation
Permeability
Pressure
Pressure loss
Properties
Shale
Water loss
water-based drilling fluid
well wall stabilization
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Summary:In this paper, nano plugging agent AMPS/AM was prepared, and its plugging performance was evaluated by a microfracture simulation experiment and a shale pressure resistance experiment. The pressure loss decreased by 66.09% compared with the top pressure of 6.9 MPa, and the average core indentation hardness increased 58.12% with 3% AMPS/AM blocking mud. The experiments indicate that AMPS/AM can effectively seal the shale micropore and nanopore structure and greatly improve the stability of fractured shale well wall. The field application results of the YS129H well in the Zhaotong block show that the water-based drilling fluid with nano plugging agent AMPS/AM as the key agent has strong plugging performance. The well mud is of high temperature and pressure water loss < s4 mL, mud cake permeability reduction rate of 85.67%, which indicates that the drilling fluid system has good sealing properties and well wall stability.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15207529