渤海湾盆地构造体系与油田地质灾害

渤海湾盆地是我国重要的石油基地。渤海湾盆地发育雁列、帚状和网状等多种类型不同级序的构造体系。根据灾害发生的动力学环境、灾害的特征、灾害的危害及灾害的分布规律,将油田地质灾害分为油水井套管损坏、诱发地震、地表冒砂喷水油等多种类型,并论述了各类的特征及分布。研究认为,渤海湾盆地油田地质灾害的形成、分布及演化受不同级序构造体系及构造应力场的控制,在帚状构造体系的收敛端等现今应力场的转化区、转折带等常是油田地质灾害发生频率高、强度大的地区。 

STRUCTURAL SYSTEMS AND OILFIELD GEOLOGICAL HAZARDS IN THE BOHAI GULF BASIN

The Bohai Gulf basin is an important petroleum base of China. Many structural systems of different structural orders are developed in the basin, such as the en-echelon, brush and network structural systems. According to the dynamic setting, characteristics, harm and distribution of geological hazards, the oilfield geological hazards occurring in the basin may be divided into several types such as well casing damage, induced earthquakes, sand blasting and water and oil spouting at the surface and ground cracks, and the characteristics and distribution of various oilfield geological hazards in the Bohai Gulf basin are discussed. The authors think that the formation, distribution and evolution of oilfield geological hazards in the Bohai Gulf basin are controlled by the structural systems and structural stress fields of different orders. The conversion or turning zones of present stress fields such as the converging end of the brush structural system are usually areas where oilfield geologic hazards take place frequently and intensively.