The formation mechanism of laumontite and its effect on reservoir quality in Upper Triassic Chang-63 tight oil sandstones, Ordos Basin

Key Points

• The study aims to understand how laumontite forms and its impact on the quality of oil reservoirs in Upper Triassic sandstones.
• Geological analysis of tight oil sandstones in the Ordos Basin
• Investigation of mineral composition and formation conditions
• Assessment of reservoir quality related to laumontite presence
• Laumontite was identified as a significant factor in reducing reservoir quality
• Higher laumontite concentrations linked to lower porosity and permeability
• Findings suggest that laumontite formation affects oil recovery efficiency