By studying the material conditions of entrapment , it is conclude that de nan depression is a low - mature oil kitchen , that main source rock of sha san member is partly mature . 2 . the undercompaction starts at the depth of 1300 to 1500 meter 研究取得的认识如下： 1 、成藏条件研究表明，德南洼陷下第三系生油岩成熟度低，主力生油层在洼陷深部进入生烃门限，德南洼陷是一个低熟油灶。
7 . the source rock in de nan depression has the characteristics of a short period of expulsion , early tectonic ceasing , short migration distance , therefore ; the most favorable places for entrapment is near oil kitchen and on the pathways of migration 7 、德南洼陷低熟油灶具源岩生排烃期短、构造定型早、锅底生油、油气运移不远等特点，故近源、在运移路径上的圈闭是形成油气藏的有利地区。
With the establishment and development of the theory of hydrocarbon generation , the oil and gas migration and accumulation patterns of the " injection migration " and the " injection migration " become the golden rules to explain the relationship of hydrocarbon generation layers and reservoirs 随著生油层理论的建立和发展，油气“上生下储”与“侧向运移”已经成为解释生油层与储集层关系的金科玉律。
Avoid deep frying especially in the preparation of meat . use steaming , baking , grilling , boiling , roasting , and other methods rather than frying . the use of a microwave oven and non - stick frying pan also helps to reduce the amount of oil in food preparation 煮食时应戒去走油的习惯，而腌肉时亦不要随手加入生油，可尽量使用蒸、焖、 ? 、水煮、滚、白灼、少油快炒的方法，更可用微波炉及易洁具来减低油量。
