The evolution characteristics of diamondoids in coal measures and their potential application in maturity evaluation

In this study, gold tube thermal simulation experiments were carried out on the soluble components (extracts) and insoluble (extracted coal-measure mudstones) of mudstones, diamondoid compounds in pyrolysis products quantitatively analyzed. The results showed that extracts extracted mudstones had undergone process formation decomposition during evolution. Based quantitative composition calculated evolution characteristics mainly consistent with experiments, indicating was primarily controlled by original material source. Some maturity parameters (MAI, EAI, TMAI-1) marine shale. Therefore, relationship between these vitrinite reflectance can be established, to calculate source rocks. addition, some coal- measure a good linear relationship, but specific different, which may enable identification kerogen cracking secondary crude oil.