关键词: 石油天然气, 地震, 油气储集规律, 无震空区

Abstract: We have studied the space distribution of Ms>5.5 earthquakes in the North China plain and its adjacent regions and discovered that there exists a kind of empty-area without earthqakes besides the empty-area with earthquakes. The empty-area without earthquakes is surrounded by relatively large earthquakes wherein there were neither historic strong earthquakes and will nor occur large earthquakes in late hundreds of years, and its indicative is the underground oil and gas. After observing the space distribution of relatively large earthquakes in some of major deposition basins and their surroundings in China, we concluded that where earthquakes concentrate, there are not oil and gas wheras where oil and gas are reserved, strong earthquakes often occur.From the view of oil-born, oil-reserve and cap-rock of oil and gas, earthquakes: would destroy these conditions, i. e. oil and gas in a region will transport and escape away along faults due to frequent seismicity even where there is a fine cap-rock and deposited oil and gas, and on the contrary, a region with oil and gas should be a stable massif and no strong earthquake will occur there in late hundreds of years. Based on this idea, three non-earthquake regions have been distinguished in the North China plain, i. e., the Lower Liaohe the East Liaoning Gulf, the Bohai Gulf-Cangzhou-the Yellow River delta and Baxian-Gaoyang.We point out at the end of this paper that the current work is also of importance for evaluating and forecasting the prospect areas of oil and gas, and that Lianyungang and its adjacent sea area and the South China sea regions might be abundant in oil and gas.

Key words: Oil-gas, Earthquake, Law of oil-gas deposit, Empty-area without earthquake