煤层气井注入压降测试井下关井实际应用及存在问题探讨

Well Testing with Injection Pressure Decline of Coal Bed Gas and Application of Shut in Well and Some Problems

井下关井是煤层气注入压降试井的重要环节之一,井下关井工具的合理使用,是确保高质量试井成果的前提,针对不同的地层条件及施工情况使用不同种类的关井工具并辅以正确的操作方法,能有效降低试井的风险性,提高试井的成功率并获得高质量、高精度的试井曲线。

Shut in well is one of important links on well testing with injection pressure decline of coal bed gas.Reasonab ly use the means of shut in well is premise ensur e high quality well testing achievem ent.In accordance with different stratigraphic and con-structed conditions,use different means and assist in correct operatin g method,can be effectively reduce r isk of well testing,and heighten successful rate of well testing,and obtain high quality of well testing curve.