低碳化学与化工2025，Vol.50Issue(9)：134-142,9.DOI:10.12434/j.issn.2097-2547.20250038
钻井液防塌剂对甲烷水合物生成的抑制性能
Inhibitory performances of drilling fluid anti-collapse agents on methane hydrate formation
摘要
Abstract
With the acceleration of deep-sea oil and gas development in China,how to inhibit the formation of hydrates in the wellbore during drilling and enhance the stability of borehole walls has become a pressing issue.To screen anti-collapse agents suitable for hydrate exploitation drilling,a series of hydrate formation experiments were conducted using a simulation device for hydrate formation and decomposition processes in drilling fluids containing anti-collapse agents.The isothermal constant volume method was employed to investigate the inhibitory effects of anti-collapse agents on methane hydrate formation,characterized by the consumption amount and consumption rate of methane gas.The results show that all three tested anti-collapse agents exhibit certain inhibitory effects on hydrate formation.Compared with the other two agents,non-hydrolyzed polyacrylamide(PAM)induces an approximate 100 min induction period during hydrate formation but has limited influence on the overall formation duration.As the concentration(mass fraction,the same below)increases,the inhibitory effect of PAM does not show significant further enhancement.Vinyl monomer copolymer(PAC-141)significantly affects the growth process of hydrates.At low concentrations,PAC-141 markedly prolongs the hydrate formation process,while the delaying effect weakens as concentration increases.The total hydrate formation time at PAC-141 mass fractions of 0.1500%,0.1750%and 0.2000%are 5840 min,3605 min and 782 min,respectively.Potassium polyacrylate(KPA)dissociates in solution to form K+and a special spatial polymeric network structure.With increasing concentration,KPA increasingly inhibits hydrate formation.This study provides a reference for addressing wellbore stability and secondary hydrate formation problems in hydrate exploitation wells.关键词
甲烷水合物/钻井液/生成速率/抑制机理/防塌剂Key words
methane hydrate/drilling fluids/formation rate/inhibition mechanism/anti-collapse agents分类
能源科技引用本文复制引用
余坤,李丹,马晓龙,魏厚振..钻井液防塌剂对甲烷水合物生成的抑制性能[J].低碳化学与化工,2025,50(9):134-142,9.基金项目
国家自然科学基金(42302352). （42302352）
