Preparation of Ultra-High Temperature Resistant Cyclodextrin-Based Filtration Loss Reducer for Water-Based Drilling...

Area of Science:

• Materials Science
• Petroleum Engineering
• Polymer Chemistry

Background:

• Ultra-deep well drilling faces challenges with high temperatures degrading drilling fluid additives.
• Efficient additives are crucial for maintaining stable drilling fluid performance under extreme conditions.

Purpose of the Study:

• To synthesize and evaluate a novel high-temperature resistant filtration loss polymer (LY-2).
• To investigate the impact of monomer ratios on LY-2's properties and performance.
• To assess LY-2's effectiveness in ultra-high temperature drilling fluid applications.

Main Methods:

• Polymer synthesis using γ-methacryloyloxypropyltrimethoxysilane (KH570), N,N-dimethylallyl ammonium chloride (DMDAAC), sodium p-styrenesulfonate (SSS), and β-cyclodextrin (β-CD).
• Characterization using Infrared spectroscopy, Thermogravimetric Analysis, and Scanning Electron Microscopy.
• Evaluation of rheology and filtration performance of drilling fluids containing LY-2 under aged conditions (260 °C/16 h).

Main Results:

• LY-2 exhibited decomposition temperatures above 600 °C, indicating excellent thermal stability.
• Drilling fluid with 3% LY-2 showed a 85.4% reduction in API fluid loss (5.1 mL) after aging at 260 °C/16 h.
• The enhanced performance is attributed to synergistic adsorption and carbon nanoparticle blocking effects.

Conclusions:

• LY-2 demonstrates superior high-temperature resistance and filtration performance compared to commercial additives.
• The polymer offers a cost-effective solution for ultra-high temperature drilling operations.
• LY-2 shows significant potential for industrial-scale application in demanding drilling environments.