确定气井地层压力的几种方法

Several methods of define gas well formtion pressure

为了及时得到气井当前地层压力,为气藏地质研究和评价、动态分析、储量计算等提供依据,根据气井试井原理和动态描述方法,提出了计算气井地层压力的几种方法。基于产能试井理论的系统试井法、稳定点二项式产能推算法,通过计算可以求得当前地层压力,并得到稳定产能方程。基于不稳定试井解释的压力恢复曲线外推法、动态模型推算法,通过不稳定试井解释及压力历史拟合,可以推算出气井的当前地层压力。实例计算表明,这几种方法简便易行,结果可靠。

In order to promptly obtains the gas well current formation pressure, for the gas pool geology research and the appraisal, the dynamic analysis, the calculation of reserves and so on provides the basis, according to the gas well well test principle and the dynamic description method, proposed the computation gas well formation pressure several methods. Based on produces can the well test theory well performance testing law, the point of fixity binomial produce can the projection method, may obtain the current formation pressure through the computation, and obtains produces stably can the equation. Based on the unstable well test explanation build-up curve extrapolated method, the dynamic model projection method, through the unstable well test explanation and the pressure history fitting, may calculate the gas well the current formation pressure. The example computation indicated that these methods are easy to do, the result is reliable.