煤层气三孔双渗试井分析方法技术研究

我国煤储层普遍具有低含气饱和度、低渗透率、低储层压力和低资源丰度等"四低"特点,煤层气测试获取资料的解释理论与试采结果的符合率较低。针对以上问题开展了煤层气试井与常规试井的异同点进行分析与评价,找出煤层气试井难点。结合煤层气地质特征,开展煤层气试井方法的适应性研究,探索适合煤层气的试井工艺;开展了影响煤层气试井因素的综合分析、研究,提出试井参数优化方法及操作规程,确保取准合格的煤层气试井资料。提出了适用于煤层气的三孔双渗试井解释模型和解释方法,提高了资料处理解释的准确率。

CBM Welltest Analysis Technology of Triple-porosity/dual-permeability

China coal reservoir generally have low containing gas saturation, low permeability, low pressure and low resources abundance which is called "four lows" feature, for these, the coincidence rate between interpretation theory of the CBM test information with the production situation is low. The main research works: The analysis and evaluation of differences and similarities between CBM and traditional well-test, and find out the CBM well-test difficulty, combined with the geological features of coalbed methane, for adaptability research of CBM well-test method, explorating for the CBM well-test process; The comprehensive analysis and study of the influence factors on CBM well-test, puts forward the well-test parameters optimization method and operation procedures, to ensure that get the accurate qualified CBM well-test data;Putting forward in the CBM well-test model and method, to improve the accuracy rate of information processing and interpretation.