dbo:abstract
- A petroleum seep is a place where natural liquid or gaseous hydrocarbons escape to the earth's atmosphere and surface, normally under low pressure or flow. Seeps generally occur above either terrestrial or offshore petroleum accumulation structures. The hydrocarbons may escape along geological layers, or across them through fractures and fissures in the rock, or directly from an outcrop of oil-bearing rock. Petroleum seeps are quite common in many areas of the world, and have been exploited by mankind since paleolithic times. Natural products associated with these seeps include bitumen, pitch, asphalt and tar. In locations where seeps of natural gas are sufficiently large, natural "eternal flames" often persist. The occurrence of surface petroleum was often included in location names that developed; these locations are also associated with early oil and gas exploitation as well as scientific and technological developments, which have grown into the petroleum industry. (en)
- 油苗（英語：petroleum seep）是指液態或氣態碳氫化合物逃逸到地球大氣和地表的地方，油苗通常在石油圈閉構造之上。碳氫化合物可能沿著地層逸出，或通過岩石中的裂縫，或直接從含油岩石的露頭中逸出。 石油逸出有兩種原因。由於構造運動破壞石油儲層上方的蓋層，導致油氣因浮力向地表遷移。或因增加埋深，導致石油儲層和蓋層超壓，故而破壞蓋層的密封性 。 (zh)