气井不同井底积液地层压力的确定

Determination of Formation Pressure of Gas Well With Different Bottom Hole Liquid Loading

在气藏工程和采气工艺中,气井的地层压力是气井生产的重要参数,地层压力一般通过井底压力计实测和井口压力计算两种方法来获取。井底压力计实测的方法不但具有一定的风险性、施工难度大,而且在采用井底压力计实测的方法时还会影响气井的正常生产。本文的主要思想:在不同井底积液情况下通过井口压力来预测井底压力,这样我们就可以通过研究井底的积液量和井口压力,来推算比较难测量的地层压力。得到以下结论:采用不同积液确定地层压力的经验公式所确定的地层压力在数值上具有一定的准确性,并且计算方法比一般的迭代法简单。

In the gas reservoir engineering and gas production process, the formation pressure of gas well is an important parameter in the production of gas well; the formation pressure is generally measured through the bottom hole pressure gauge or calculated by wellhead pressure. Using the bottom hole pressure gauge to measure the formation pressure not only has some risks and large construction difficulty, but also affects the normal production of gas well. In this article, based on wellhead pressure of gas well with different bottom hole liquid loading, the bottom hole pressure was predicted. The relationship between bottom hole fluid volume and wellhead pressure was studied to calculate the bottom hole pressure. The results show that calculated result of the bottom hole pressure by experience formula is accuracy, the calculation method is simpler than the general iterative method.