Inhibitory performances of drilling fluid anti-collapse agents on methane hydrate formation

YU Kun; LI Dan; MA Xiaolong; WEI Houzhen

doi:10.12434/j.issn.2097-2547.20250038

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Inhibitory performances of drilling fluid anti-collapse agents on methane hydrate formation

更新时间：2025-09-26

- Inhibitory performances of drilling fluid anti-collapse agents on methane hydrate formation
- Vol. 50, Issue 9, Pages: 134-142(2025)
- 作者机构：
  
  1.武汉科技大学城市建设学院，湖北武汉 430065
  2.中国科学院武汉岩土力学研究所，湖北武汉 430071
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250038
  CLC： TE37
- Received：24 January 2025，
  
  Revised：2025-04-10，
  
  Published：25 September 2025
- 稿件说明：
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余坤,李丹,马晓龙等.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.

YU Kun,LI Dan,MA Xiaolong,et al.Inhibitory performances of drilling fluid anti-collapse agents on methane hydrate formation[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(9):134-142.
余坤,李丹,马晓龙等.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. DOI： 10.12434/j.issn.2097-2547.20250038.

YU Kun,LI Dan,MA Xiaolong,et al.Inhibitory performances of drilling fluid anti-collapse agents on methane hydrate formation[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(9):134-142. DOI： 10.12434/j.issn.2097-2547.20250038.

摘要

随着我国深海油气开发进程的加速，如何在钻井过程中抑制井筒内水合物的生成并增强开采井井壁的稳定性，成为深海油气开发中有待解决的问题。为了筛选适用于水合物开采钻井的防塌剂，利用钻井液中水合物合成与分解过程模拟装置，开展了含防塌剂的钻井液中水合物生成实验。采用等温恒容法研究了防塌剂对甲烷水合物生成的抑制效果，并通过甲烷气体的消耗量与消耗速率进行了表征。结果表明，实验所用的3种防塌剂对水合物的生成均具有一定的抑制效果。非水解聚丙烯酰胺（PAM）相比于其他两种防塌剂，会使水合物生成过程出现约100 min的诱导期，但对整体生成过程耗时影响有限。随着PAM浓度（质量分数，下同）的增大，其对水合物生成的抑制效果变化不再显著。乙烯基单体多元共聚物（PAC-141）可显著影响水合物的生成过程，其中低浓度PAC-141显著延长了水合物的生成过程。随着PAC-141浓度的增大，其延迟水合物生成的效果逐渐减弱。在PAC-141浓度分别为0.1500%、0.1750%和0.2000%的体系中，水合物生成总耗时分别为5840 min、3605 min和782 min。由于电离作用，聚丙烯酸钾（KPA）会在溶液中电离生成K

及特殊的空间网络结构。随着KPA浓度的增大，其对水合物生成的抑制效果逐渐增强。本研究可为解决水合物开采井井壁稳定性问题及水合物二次生成问题提供参考。

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.

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