Analysis on high thermal revolution degree and low potential of generating hydrocarbon of Carboniferous Permian in the southwest of Henan Province by SEM
HUANG Xue-feng;WU Wei;WANG Yu-han;Henan Polytechnic University;
According to the evaluation standard of hydrocarbon source rock geochemistry,the geochemical characteristics of coal measure source rocks in Yiluo Basin,western of Henan Province were analyzed in this work. Possible factors of high thermal evolution and low generating hydrocarbon potential of Carboniferous Permian source rocks in study area were carried out by macroscopic and microcosmic qualitative analysis using scanning electron microscope( SEM) and core observation methods. The results showed that the organic carbon content in the Taiyuan Formation and Shanxi Formation was high,where the source rocks were medium-good and the organic matter type was III. In all organic maceral,the vitrinite content was the highest and the exinite took second place. Many fractures were found by core observation methods. A large number of micro-fracture and micro-pores,including inter-particle pore,intra-particle pore,intra-crystalline pore,corrosion pore,rock convergent,micro fracture and organic matter pore,were found in samples by SEM. It was thought in this work that the existence of these fracture and pore was main factors of low hydrocarbon generating potential and high thermal maturity of source rocks in study area.