Mechanical properties of Carboniferous volcanic rock reservoirs and correction of dynamic and static parameters

LYU Bei; CHENG Leiming; ZHANG Yufei; LUO Yao; LI Mengjie; FU Junwang; LI Jinquan; LI Shiyuan

doi:10.12090/j.issn.1006-6616.2025102

Volume 31 Issue 6

Dec. 2025

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Article Navigation > Journal of Geomechanics > 2025 > 31(6): 1296-1309

LV B，CHENG L M，ZHANG Y F，et al.，2025. Mechanical properties of Carboniferous volcanic rock reservoirs and correction of dynamic and static parameters[J]. Journal of Geomechanics，31（6）：1296−1309 doi: 10.12090/j.issn.1006-6616.2025102

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Mechanical properties of Carboniferous volcanic rock reservoirs and correction of dynamic and static parameters

doi: 10.12090/j.issn.1006-6616.2025102

LYU Bei^1
,,
CHENG Leiming^1
,,
ZHANG Yufei^1
,,
LUO Yao^1
,,
LI Mengjie^2
,,
FU Junwang^2
,,
LI Jinquan^2
,,
LI Shiyuan^{2
,
,}

1.
China Petroleum Corporation New Oilfield Division (Oil Production Technology Research Institute), Karamay 834000, Xinjiang, China
2.
College of Petroleum Engineering, China University of Petroleum (Beijing), Beijing 102249, China

Funds: This research is financially supported by the National Science and Technology Major Project (Grant No. 2025ZD1401404), the General Program of the National Natural Science Foundation of China (Grant No.52174011), and the Key Program of the National Natural Science Foundation of China (Grant No. 52434001).

More Information

Received: 2025-08-01
Revised: 2025-12-01
Accepted: 2025-12-05

Available Online: 2025-12-12

Published: 2025-12-28

Abstract

Abstract

Objective To address the challenges posed by the strong heterogeneity of the volcanic reservoirs of the Carboniferous C2 Formation in the Junggar Basin and the low accuracy of rock mechanical parameters derived from logging data, this study aims to precisely determine the relationship between dynamic and static mechanical parameters for typical lithologies to enhance the reliability of static parameter predictions. Methods Based on systematic laboratory testing of four representative lithologies (andesite, basalt, tuff, and volcanic breccia), lithology-specific dynamic-to-static conversion models were established and calibrated by introducing a confining pressure sensitivity parameter. An integrated microstructural analysis via thin-section and scanning electron microscope (SEM) observations was conducted. Results The research yielded clear quantitative relationships between the dynamic and static parameters for all four lithologies and confirmed the high accuracy of the newly established, confining-pressure-corrected conversion model. Conclusion The analysis further reveals an intrinsic link between the differences in macroscopic mechanical properties and dynamic-static parameter responses on the one hand and specific microstructural characteristics(including mineral composition, grain structure, and pore-fracture development) on the other. This link confirms the fundamental control that the rock microstructure has. The model developed and calibrated in this study effectively improves the accuracy of predicting static mechanical parameters, thereby providing critical technical and theoretical support for accurately obtaining these essential parameters from conventional logging data. Significance This model is of significant practical value for the efficient exploration and development of similar volcanic hydrocarbon reservoirs.
- volcanic rock,
- Carboniferous System,
- dynamic and static parameters,
- rock mechanical properties,
- microscopic mechanism

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