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

Minjia Jing, Zhiping Yuan, Xiaoyang Li, Jinjun Huang () and Yuexin Tian
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Minjia Jing: Drilling and Production Engineering Technology Research Institute, Chuanqing Drilling Engineering Co., Ltd., Guanghan 618300, China
Zhiping Yuan: Drilling and Production Engineering Technology Research Institute, Chuanqing Drilling Engineering Co., Ltd., Guanghan 618300, China
Xiaoyang Li: Chuanqing Drilling Engineering Co., Ltd., Chengdu 610500, China
Jinjun Huang: State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
Yuexin Tian: State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

Energies, 2022, vol. 15, issue 20, 1-10

Abstract: 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.

Keywords: nano plugging agent; long horizontal section horizontal well; water-based drilling fluid; well wall stabilization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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