启动压力梯度其实并不存在，它只是一种实验假象。通过分析启动压力梯度导致的一些错误结果，证明了启动压力梯度不存在。若存在启动压力梯度，当地层中未注入流体时， 压力却可以升高．这违背了科学原理；地层将不存在静4-ef~力，而是存在压力梯度不为0的压力分布， 这与实际情况不符：地层压力将永远恢复不到原始地层压力，显然与实际情况也不相符；地层压力分布将出现动边界奇点．数学上将不能自洽；油气运移将无法进行，也就不会有油气聚集， 实际情况并非如此；流体静止时将具有抗剪切能力，违背了流体力学的基本原理。

Starting pressure gradient does not truly exist，which is a wrong phenomen0n in exDeriment．Through theanalysis of some mistakes caused by starting pressure gradient，this paper proved that the starting pressure gradient d0es not exist·With starting pressure gradient，pressure can increase automatically without any liquid injection；the e will be n0unique equilibrium pressure in reservoir，but a pressure distribution with a pressure gradient；reserv0ir Pressure can not return to initial value even after a long time；reservoir pressure distribution will evolve a singularity point mathematica11v：migration of oil and gas can not make progress and accumulation of oil and gas can not take place at all；static liquid will have the ability to suffer from shear stress． All the phenomena above do not agree with the Dractice 0f 0it and gas development，and also do not comply with the principle of science． Without starting pressure adient，the science 0f petroleum will be self-consistent．