一、井喷发生的原因及现象储藏石油构造的地层,可能含有高压天然气、石油和水。当油田钻井穿过这些岩层的时候,天然气会很快的从孔底及四壁侵入钻孔而混入泥浆中。起初混入泥浆的天然气呈压缩状态的极小气泡,并随着泥浆循环而沿孔壁上升。由于上升程度的增加,泥浆柱对气泡的压力就逐渐降低,气泡因而渐渐扩大,泥浆的粘度也渐增,比重降低,体积增大,因此气泡开始从 First, blowout causes and phenomena Storage of oil-bearing formations, which may contain high-pressure natural gas, oil and water. As the oil field drills through these formations, natural gas quickly intrudes into the mud from the bottom and walls of the borehole. Natural gas initially mixed into the mud is compressed air bubbles and rises along the pore walls as the mud circulates. As the degree of increase increases, the pressure on the bubbles in the mud column gradually decreases, the bubbles expand, the viscosity of the mud increases, the specific gravity decreases and the volume increases,