Research Article
Comprehensive Evaluation of the Hydrocarbon Preservation Conditions in the Complex Tectonic Area of the Southwestern Sichuan Basin, China
Table 2
The comprehensive evaluation system of the hydrocarbon preservation conditions of Cambrian formations.
| | Evaluation parameters | Evaluation results | | Class I | Class II | Class III |
| | Distance to dominating fault/km | >3.0 | 1.5-3.0 | <1.5 | | Fault development | Less distributed, small fault distance, and few cut-through horizons | Widely distributed, medium fault distance, and more cut-through horizons. | Widely distributed, large fault distance, multiple cut-through layers, and deep cut layers | | Outcrops | Jurassic–Triassic | Permian-Devonian | Silurian-Sinian | | Mineralization (g L-1) | >40 | 15-40 | <15 | | Water type | CaCl2 | MgCl2, Na2SO4 | NaHCO3 | | Caprock | Large thickness and good sealing | Moderately sealed | Small thickness and severe erosion |
|
|
