CAJ | 학술논문

利用显微CT试验分析系统，对油页岩样进行不同温度下的显微CT扫描，并应用三维衰减系数重建技术对不同温度下油页岩样内部孔、裂隙的演化特征进行分析研究，结果表明：(1)在20℃～600℃温度范围内，油页岩样内部孔隙、裂隙的数量和规模发生了质的变化，从致密状态变为孔、裂隙发育的多孔介质。(2)随着温度的升高，油页岩内部空隙团不断得到连通，从100℃时的只局限在一个很小区域的小规模，发展到200℃时的连通了油页岩内部立方体区域2个相对面的渗流通道，到600℃时，油页岩内部热解率达到了39.80%，最大空隙团在空隙团中的比例达到97.45%，空隙团已基本全部得到连通，形成了连通整个区域的渗流通道。研究结论对分析油页岩原位热解过程中油气的渗流通道的发展规律有重要意义。
이용현미CT시험분석계통，대유혈암양진행불동온도하적현미CT소묘，병응용삼유쇠감계수중건기술대불동온도하유혈암양내부공、렬극적연화특정진행분석연구，결과표명：(1)재20℃～600℃온도범위내，유혈암양내부공극、렬극적수량화규모발생료질적변화，종치밀상태변위공、렬극발육적다공개질。(2)수착온도적승고，유혈암내부공극단불단득도련통，종100℃시적지국한재일개흔소구역적소규모，발전도200℃시적련통료유혈암내부립방체구역2개상대면적삼류통도，도600℃시，유혈암내부열해솔체도료39.80%，최대공극단재공극단중적비례체도97.45%，공극단이기본전부득도련통，형성료련통정개구역적삼류통도。연구결론대분석유혈암원위열해과정중유기적삼류통도적발전규률유중요의의。
A micro-CT experimental system was used to scan a specimen of oil shale subjected to pyrolysis at different temperatures. From 3D CT images based on X-ray attenuation coefficients,the evolution of pores and cracks in the specimen was analyzed at different stages of pyrolysis. The results show that:(1) From 20 ℃ to 600 ℃, the specimen is transformed from a compact state to a porous medium. (2) At the higher temperatures,increasing numbers of voids become interconnected. At 100 ℃,the voids are restricted to a very small region;but as the temperature is raised to 200 ℃,channels for oil and gas seepage are formed within the study region. At 600 ℃,the pyrolysis rate of the specimen is calculated to reach 39.80%;and the largest void is 97.45%of all the voids. All voids are interconnected into one large void,forming a channel for the seepage of oil and gas running through the entire X-rayed region. The study conclusions are of great significance for discovering how the channels for oil and gas seepage developing during in-situ pyrolysis of oil shale.