英台油田利用液面资料求取地层参数可行性研究

Feasibility research on reservoir parameter obtained by
annulus liquid level data in Yingtai Oilfield

 张辉

Zhang Hui

 吉林油田分公司勘探开发研究院，松原吉林138000

Exploration and Development Research
Institute of Jilin Oilfield Company,CNPC

环空液面恢复法是在压力计下不到井底情况下获得油藏参数的主要测压方法。通过对试
验资料分析研究，确定英台采油厂平均压力梯度，给出了折算压力经验公式，为以后环空液面恢复法提
供了依据，指出了实际采集的时间-液面数据，通过折算后的压力数据。由于各种因素的影响，导致了错
误的数据，因此需要对某些数据做预处理或修正，确保压力恢复曲线不发生变化。

Annulus liquid level data is useless for well testing. But it is
the primary method for gaining reservoir parameter while pressure
gauge can’t drop to the well bottom. By analyses the test data, we
can confirm Yingtai Oil-field average formation pressure gradient as
0.009704. It aslo computes the converting pressure experience
formulation for the later test and points out the factual time dataannulus
liquid level data being translated the pressure data, and it is
wrong for all kinds of factor .So we must deal with these data and
insure that there is no change with build -up curve. By graph
recognizing and model diagnosing, the relative error of interpreting
pressure is 2.26%.