钻探工程2025，Vol.52Issue(4)：17-25,9.DOI:10.12143/j.ztgc.2025.04.003
天然气水合物地层MICP稳固实验研究
Experimental study on the stabilization of natural gas hydrate formation by MICP
摘要
Abstract
To explore novel methods for enhancing natural gas hydrate reservoirs,microbial-induced calcium carbonate precipitation(MICP)technology was carried out consolidation experiments and flow simulations on simulated formation samples.Initially,the artificially prepared hydrate formation samples were consolidated using microbial solutions.Triaxial testing equipment was then used to assess the strength of the consolidated samples,revealing an increase in cohesion and friction angle from the initial 3.7kPa and 34.7° to 42.3kPa and 35.6°,respectively.Then,scanning electron microscopy,XRD,and CT analyses were performed on the samples,the calcium carbonate precipitated comprised both calcite and aragonite crystal forms.Concurrently,the samples'porosity decreased from 46.38%to 28.12%,and the equivalent pore throat radius shrank from 110.39µm to 67.93µm.Bacterial fluid flow and calcium carbonate formation within the formation were obtained by numerical simulations.The carbonate precipitation was semi-circular,progressively diffusing into the formation's interior,with a maximum radial diffusion range of approximately 1.6 meters.And its content steadily increased throughout the reaction,reaching a maximum of about 102 kg/m3.Meanwhile,the formation's porosity and permeability decreased by 5.6%and 35%after two days,respectively.The resulting impact on the subsequent hydrate production rate can be mitigated by expanding the production pressure differential.关键词
微生物加固/天然气水合物/储层改造/地层强度/孔隙率/渗流半径Key words
MICP reinforcement/gas hydrate/reservoirs enhancing/formation strength/porosity/seepage radius分类
能源科技引用本文复制引用
温达洋,田进,赵琥,冯颖韬,崔策,郑少军,刘天乐..天然气水合物地层MICP稳固实验研究[J].钻探工程,2025,52(4):17-25,9.基金项目
国家自然科学基金项目"水合物分解对深水固井水泥环孔隙特征与力学性质的影响机制研究"(编号:42072343) （编号:42072343）
中央高校基本科研业务费专项资金项目(编号:107-G1323523046) （编号:107-G1323523046）
国家高层次人才专项支持计划(编号:107-KZ23Z20016) （编号:107-KZ23Z20016）
