Sentence examples for sweet areas from inspiring English sources
Based on the exploration and research progress of liquid-rich hydrocarbons in shale at home and abroad, their formation condition, accumulation mechanism, classification, and differences between lacustrine and marine shale systems are examined, and "sweet areas" are evaluated further.
"Sweet areas" evaluation should consider the three aspects of geology, engineering and economics comprehensively, and the maturity of source rocks is first and foremost factor controlling the "sweet area" distribution.
It is concluded that the geological conditions of the lacustrine shales in China are characterized by lower thermal gradient and stronger heterogeneity than those of North America, so large scale "sweet areas" have to be picked out to push up industrial production steadily.
Comprehensive evaluation should focus on source rock, reservoir, overpressure, and fracture for geological "sweet area," on buried depth, rock compressibility, and stress anisotropy for engineering "sweet area," and on resources scale, buried depth and surface conditions for economic "sweet area".
a Tight oil "sweet area" distribution of the Fuyu oil layer, Songliao Basin; b tight oil "sweet area" distribution of Chang 71 Member in the Ordos Basin.
Areas with grade I and II source rocks and reservoirs are tight oil "sweet area".
At present, priority should be given to favorable source rock, reservoir, overpressure, fracture, and local structure of geological "sweet area," and pressure coefficient, brittleness, crustal stress, and buried depth of engineering "sweet area" (Table 2).
The evaluation of the distribution of tight oil "sweet area" should focus on relationships between "six features".
"Sweet area" refers to the target area rich in unconventional tight oil which should be developed in priority under current economic and technical conditions.
Tight oil "sweet area" generally occur in the area where source rocks and reservoirs are associated and natural fractures and localized structures are present.
Finally, 20 favorable "sweet area" with an area of 5100 km2 and resources of 45 × 108 t were identified in the Songliao, Ordos, and Junggar Basins.
