影响气层中途测试资料解释准确性的因素分析

Analysis of influence factor on accuracy of drill stem testing data interpretation

由于天然气的可压缩性及含硫化氢高等特点 ,气井的测试资料往往会因为井筒效应大而出现曲线变化复杂 ;或者含硫气井测试受时间限制而出现曲线不完整的情况 ;这些情况 ,会影响对油藏模型的诊断和资料解释的精度。针对以上问题 ,文章主要介绍如何区分双对数曲线中的变井筒效应和复杂模型的方法 ,以及如何正确处理含硫气井测试时间短和取全原始资料的之间的矛盾 ,另外 ,文中分析了针对气井测试的拟时间法 ,这种方法的使用与否会影响对气层解释的准确性。

Beause of the compressibility and high H 2S content of natural gas,the gas-well testing curves often become very complicated due to gas-kick effects or incomplete due to the restricted testing time in H 2S well bore which will then influence the accuracy of reservoir model diagnostics and data interpretation.This article introduces methods which distinguish different changing wellbore storage with different complex models,and tell you how to deal with the contradiction between short testing time required for H 2S gas wells and complete preliminary information.Pseudotime method is also presented herein,the application of it or not will influence the accuracy of gas-zone interpretation.