The application of dual-polymer anti-sloughing flushing fluid for drilling in covering layers

doi:10.12143/j.ztgc.2025.02.008

Home > Archive>Volume 52, Issue 2, 2025 >59-64. DOI:10.12143/j.ztgc.2025.02.008

The application of dual-polymer anti-sloughing flushing fluid for drilling in covering layers
DOI:
                        10.12143/j.ztgc.2025.02.008
                    
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Author:
                        YU Fu’an1,2YU Fu’an
Yantai Center of Coastal Zone Geological Survey, China Giological Survey, Yantai Shandong 264001, China;Technology Innovation Center of Marine Land Integrated Drilling Engineering, Yantai Shandong 264001, China
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LIU Weiping1,2LIU Weiping
Yantai Center of Coastal Zone Geological Survey, China Giological Survey, Yantai Shandong 264001, China;Technology Innovation Center of Marine Land Integrated Drilling Engineering, Yantai Shandong 264001, China
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SUN Jianyue1,2SUN Jianyue
Yantai Center of Coastal Zone Geological Survey, China Giological Survey, Yantai Shandong 264001, China;Technology Innovation Center of Marine Land Integrated Drilling Engineering, Yantai Shandong 264001, China
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Affiliation:1.Yantai Center of Coastal Zone Geological Survey, China Giological Survey, Yantai Shandong 264001, China;2.Technology Innovation Center of Marine Land Integrated Drilling Engineering, Yantai Shandong 264001, China
Clc Number:P634.6
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Abstract:

During the drilling process in the covering layer of Zhumadian area in Henan Province， the Quaternary clay layer， sandy mudstone， loose sandstone unevenly interbedded with mudstone were encountered， resluting in difficult wall protection， prone to accidents such as block jamming， hole collapse and burial， and difficult in taking cores. Based on the geological conditions and the drilling construction data within the area， the dual-polymer anti-sloughing flushing fluid was used. In the on-site application， the stability of the hole wall was good during the drilling process of the long open hole well section， without any incidents of falling or collapes. The core recovery rate can meet the geological design requirements， moreover， the casing depth and construction cost were reduced.

Key words:dual-polymer anti-sloughing flushing fluid;covering layer;loose sandstone;stability of the hole wall

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Received:August 17,2024
Revised:September 05,2024
Adopted:November 01,2024
Online: March 25,2025
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