地质与资源2026，Vol.35Issue(3)：314-324,291,12.DOI:10.13686/j.cnki.dzyzy.2026.03.009
松辽盆地低熟页岩原位改质过程孔隙演化研究
Porosity evolution during in-situ conversion process of low-maturity shale in Songliao Basin
摘要
Abstract
The low-maturity shale oil and gas resources exhibit vast reserves and tremendous development potential,particularly in Songliao Basin with resources up to 323 600 Mt.However,current research on pore size and morphology evolution during in-situ heating of low-maturity shale in northern Songliao Basin remains insufficient.Taking the low-maturity shale in northern Songliao Basin as object,this study employs thermal simulation experiment combined with CT scanning,high-pressure mercury injection,low-temperature nitrogen adsorption,and scanning electron microscopy(SEM)to investigate the pore development characteristics during heating process,and analyze the evolution process and mechanism.The results show that at 350-375 ℃,the organic matter undergoes significant pyrolysis,generating abundant gas pores and organic pores;at 400-500 ℃,pyrolysis approaches completion,developing extensive intergranular pores and microfractures,with increased porosity and average pore size.The total pore volume and average pore diameter display a synchronized increase-decrease-increase trend.The pore morphology is dominated by slit-shaped pores with narrow openings at 0 ℃ and 300℃,transformed to slit-shaped pores with wide openings at 350 ℃,primarily open-ended cylindrical pores at 375 ℃,and reverting to slit-shaped pores with wide openings at 400-500℃.关键词
低熟页岩/原位改质/孔隙演化/页岩油气/松辽盆地Key words
low-maturity shale/in-situ conversion/porosity evolution/shale oil and gas/Songliao Basin分类
天文与地球科学引用本文复制引用
徐坚,刘鑫,李伟,孙先达,李婷婷,马生明,许承武,王金焕,孟英杰..松辽盆地低熟页岩原位改质过程孔隙演化研究[J].地质与资源,2026,35(3):314-324,291,12.基金项目
国家自然基金项目"原位加热下页岩储层孔-裂隙动态演化机制研究"(42172163). （42172163）
