Geochemical Characteristics and Source Identification of Oil in Block M, Junggar Basin

DOI

10.2991/978-94-6463-415-0_27How to use a DOI?

Keywords

Geochemical characteristics; Oil-source; Permian source rocks; Block M; Junggar Basin

Abstract

Block M in the central area of the Junggar Basin holds abundant shallow oil and gas resources with enormous exploration potential. However, exploration practices have indicated the presence of multiple sets of hydrocarbon-rich source rocks in Block M, making it difficult to identify the sources of oil and gas in the Cretaceous strata, which in turn affects future exploration directions. To address this issue, geological data, on-site samples, and experimental tests were utilized to analyse the physical and chemical components, carbon isotopic characteristics, and biomarker compounds of the Cretaceous strata in Block M. The results are as follows: (1) Block M primarily contains two sets of hydrocarbon source rocks from the Jurassic and Permian periods, with biogenic oil as the main type; (2) The API gravity of the crude oil ranges from 38.0 to 56.6, with an average of 44.0, and the gas-oil ratio ranges from 139.0 to 5044.0 m³/m³, with an average of 2274.5 m³/m³, indicating that the crude oil is predominantly light condensate; (3) The carbon isotopic values of the crude oil are relatively low, with an average of -30.4‰, suggesting a source primarily from sapropelic materials. The abundance and arrangement of biomarker compounds indicate that the oil originates from the Permian source rocks. This study provides valuable guidance and reference for comparative studies on oil and gas accumulation in areas with similar geological characteristics.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Download article (PDF)

TY  - CONF
AU  - Xiaojiao Yuan
AU  - Xueying Chen
AU  - Simeng Jiang
PY  - 2024
DA  - 2024/05/14
TI  - Geochemical Characteristics and Source Identification of Oil in Block M, Junggar Basin
BT  - Proceedings of the 2023 9th International Conference on Advances in Energy Resources and Environment Engineering (ICAESEE 2023)
PB  - Atlantis Press
SP  - 256
EP  - 262
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-415-0_27
DO  - 10.2991/978-94-6463-415-0_27
ID  - Yuan2024
ER  -