最后计算了井底压力变化规律。
通过建立局部坐标系，得到了裂缝性地层井壁发生失稳的弱面角度随井底压力变化的规律。
Then, the influence of bottom hole pressure on the failure range of weak plane is analyzed for bore holes in naturally fractured formation, with the help of the local coordinate system.
无限大地层中—口间歇试采生产井的地层压力分布及井底流压变化规律；
The rule of reservoir pressure distribution and bottom hole flowing pressure alteration of a periodic trial-produce well in infinity subterranean formation.
通过改变喷嘴入口压力、钻头保径宽度、喷嘴直径等影响因素，来研究井底流场的变化。
By changing the nozzle inlet pressure, drill gage width, nozzle diameter factors, to study the changes in these flow fields.
在井底产层的条件下，油气水的物性参数随温度和压力的变化而变化。
When pay zone is at the bottom of a well, the physical properties of oil, gas and water vary with temperature and pressure.
在井底产层的条件下，油气水的物性参数随温度和压力的变化而变化。
When pay zone is at the bottom of a well, the physical properties of oil, gas and water vary with temperature and pressure.
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