Laboratory investigation of air injection in kerogenbearing rocks. Part 2. evaluation of organic matter conversion

T. M. Bondarenko, D. A. Mett, V. D. Nemova, G. A. Usachev, A. N. Cheremisin, M. Yu Spasennykh

Research output: Contribution to journalArticlepeer-review

Abstract

High-pressure combustion tube test was conducted to evaluate the effectiveness of air injection in terms of hydrocarbons generation from kerogen bearing rocks and to compare combustion front quenching techniques. The test consisted of several stages including air injection, stop of air injection, reigniting and quenching of combustion front with nitrogen. Pyrolysis study of core samples unpacked from combustion tube indicated to complete conversion of resins, asphaltenes and kerogen behind the combustion front. As you move away from the combustion front, the amount of converted organic matter decreases. According to the results of extraction of the unpacked crushed core samples located in front of the combustion front, the bank of synthetic oil is observed, which did not reach the combustion tube exit at the time of air injection shut down. The coefficient of displacement and generation of hydrocarbons by the time of stopping the combustion front in the middle of the core model was 26.6%wt, where 15.6%wt accounted for hydrocarbon gases and 11%wt for oil. There is a significant gasification of kerogen. At the time of the front shutdown, the percentage of hydrocarbons generated from kerogen was 28.6%, which indicates the efficiency of the process in terms of hydrocarbon generation. However, the results indirectly indicate a significant generation of synthetic hydrocarbon gases, which must be monitored in the field during the initial stage of air injection.

Original languageEnglish
Pages (from-to)59-61
Number of pages3
JournalNeftyanoe Khozyaystvo - Oil Industry
Volume2020
Issue number10
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Air injection
  • Combustion front
  • Combustion tube
  • Kerogen-bearing rocks
  • Synthetic oil

Fingerprint

Dive into the research topics of 'Laboratory investigation of air injection in kerogenbearing rocks. Part 2. evaluation of organic matter conversion'. Together they form a unique fingerprint.

Cite this