Open AccessComprehensive Evaluation of Source Rocks Characteristics in Yiliping Area, Qaidam Basin
Author(s) -
Xintong Wang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/781/2/022109
Subject(s) - source rock , neogene , kerogen , geology , structural basin , geochemistry , hydrocarbon , resource (disambiguation) , vitrinite reflectance , petroleum engineering , vitrinite , paleontology , chemistry , computer network , organic chemistry , computer science
Yiliping area in the middle of Qaidam Basin is a key area for oil and gas exploration in Qinghai Oilfield in recent years. However, the geochemistry characteristics of source rocks in Neogene are relatively vague, which results in the inaccuracy of hydrocarbon resource potential. Based on the seismic interpretation, well logging results, and analytical tests, the comprehensive characteristics of Neogene source rocks in the Yiliping area have been studied. The results show that the distribution of source rocks varies widely. The kerogen type is II2-III. The total organic content is from 0.2% to 1.96%. The vitrinite reflectance (Ro) is from 0.5% to 1.2%, which reflects a mature stage. The content of (S 1 +S 2 ) varies from 0.01 mg/g to 89.66 mg/g. Through the comprehensive analysis, the Yiliping area is qualified for hydrocarbon generation, but has a fair resource potential. In the future, it can be considered to exploit when the cost of oilfield development is reduced.