کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6435410 | 1637167 | 2014 | 12 صفحه PDF | دانلود رایگان |
- The reservoir of the rock in southern Sichuan Basin of China has shale gas potential.
- The greatest reservoir is located in NE depocenter, with the maximum thickness 170Â m.
- Two most favourable areas for exploration forecast were located in Luzhou northeast.
- Favourable area is about 5100Â km2, accounting for 14.9% of the whole shale gas region.
The Lower Silurian Longmaxi Formation (the Palaeozoic) is organic-rich (black) shale in the southern Sichuan Basin (the Yangtze Plate) of China. This study analyses the lateral extent and thickness, burial depth, total organic carbon content and thermal maturity of the Longmaxi Formation black shale as the key features of the shale gas reservoir. The thickness of the black shale ranges from 10 to 170Â m. The thickest reservoir is located in Changning-Naxi-Yongchuan region. The TOC of the shale at the bottom of the formation (50-m thickness) is above 2.0%. The lateral distribution of TOC varies with the lateral distribution of thickness, with the maximum TOC in the Gongxian-Luzhou-Yongchuan region. The burial depth ranges from 2000 to 4500Â m. The shale is thermally over mature. The evaluation of reservoir characteristics indicates that the Longmaxi Formation has conditions appropriate for shale gas accumulation and thus resource potential in the southern Sichuan Basin of China.The objective of this preliminary evaluation of the reservoir characteristics is to locate potential areas favourable for exploration. The most favourable areas are defined here as those where the thickness of black shale is more than 100Â m and the burial depth is less than 3000Â m; these cover approximately 12,600Â km2. The most favourable areas, which cover an area of approximately 5100Â km2, are located in the northeast Luzhou region.
Journal: Marine and Petroleum Geology - Volume 57, November 2014, Pages 619-630