Research Article
The Influential Factors and Characteristics of Tight Sandstone Gas Reservoir: A Case Study in Ordos Basin in China
Table 2
Quantitative calculation method of porosity evolution in sandstone reservoir (modified from [
39,
40]).
| Parameters of porosity evolution | Formula |
| Primary porosity, % | | Residual porosity after compaction, % | | Porosity reduction due to cementation, % | | Porosity increase due to dissolution, % | |
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Note: this research is not involved in microscopic fractures and pores of interstitial material due to the difficulty in their statistical approach.
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