Classification and evaluation criteria of shale oil and gas resources: Discussion and application

Organic geochemistry and petrology of Lower Cretaceous black shales in the Qiangtang Basin, Tibet: Implications for hydrocarbon potential

“…4.0 wt% (Fig. 9), indicating that these rocks have good unconventional hydrocarbon potential (Lu et al, 2012). This suggests that the Shengli River black shale sequences with TOC > 4.0 wt% are nearly saturated with petroleum and thus may have significant shale-oil production potential.…”

“…The hydrocarbon enrichment and expulsion potential of source rocks can be roughly evaluated from the correlation between S 1 and chloroform-extractable bitumen values and the TOC of source rocks, as shown by recent research on a large dataset for shales in China (Lu et al, 2012), including sediments from the Songliao, Yitong, Bohai Bay and Hailar basins. Using this approach, the S 1 and chloroform-extractable bitumen contents of the Shengli River black shale sequences rise rapidly when TOC contents reach ca.…”

Classification and characteristics of tight oil plays

“…Source rocks are developed both in the upper part and lower part of reservoir in these plays ( Fig. 8) with relatively large contact area between source rocks and reservoirs, which is favorable for hydrocarbon expulsion from source rocks (Lu et al 2012). In-source mud-dominated plays and in-source plays are classified as in-source hydrocarbon-supply mode.…”

The formation environment and developmental models of argillaceous dolomite in the Xingouzui Formation, the Jianghan Basin

“…Shale oil has recently been found in the dolomite mudstone and argillaceous dolomite in the Jianghan, Junggar and Santanghu Basins (Liang et al, 2012;Luo et al, 2013;Zou et al, 2013a,b), revealing a new field for exploring and developing shale oil. After discussing the actual geological conditions in China, in combination with the formation conditions, occurrence state and accumulation mechanism of shale oil and gas, the most favorable zones have been predicted based on the research data, exploration and the development of shale oil and gas in North America (Zhang et al, 2003;Nie et al, 2009;Zou et al, 2010Zou et al, , 2013aZhao et al, 2011;Zhang, 2011;Lu et al, 2012). The amount of residual hydrocarbons in shale can be calculated easily based on the current method for quantitatively evaluating source rocks (Lu and Zhang, 2008).…”