论文部分内容阅读
本文汇集和分析了唐山地震前后(1970—1980年),渤海湾地区各油田的油井动态资料,结果表明:一、大地震的孕育和发生对油井动态有所影响.二、唐山地震前的油井动态异常主要表现为油产量和井压的大幅度升降.三、唐山地震前后井口压力实测曲线形态与水压致裂法测量地应力时,岩石破裂前后的曲线很相似.四、天然地层压力驱动的油井显示了清楚的震前变化,但这类井在油田只占极少数,而且迟早会转化为人工驱动型井,使问题复杂化.
This paper collects and analyzes the oil well dynamic data of various oil fields in the Bohai Gulf before and after the Tangshan earthquake (1970-1980). The results show that: 1. The occurrence and occurrence of large earthquakes have an impact on the well performance; 2. The oil well before the Tangshan earthquake The dynamic anomaly is mainly manifested as the significant increase and decrease of oil production and well pressure.Thirdly, the curve of wellhead pressure measured before and after Tangshan earthquake is similar to the curve before and after the rock burst when the geostress is measured by hydrofracturing.Four, the natural formation pressure-driven Of the wells show clear pre-seismic changes, but such wells are only a small part of the field and will sooner or later be converted to manually driven wells, complicating the issue.