摘要
煤气储层具有与砂泥岩地层不同的储层物性，常规测试很难获取地层参数。采用进口专用工作泵及DST测试井下关并测试工艺可在井筒周围形成一个单相流动的压力升高区，关井测试其压力降落曲线，之后进行四个周期的微破裂压力测试，保证开关井操作一次成功，即可准确求取煤气储层的各项地层参数。
Coal gas reservoir has different physical properties from sand and shale stone formation, it is difficult for conventional test to get formation parameters. By use of an imported special working pump and DST downhole shut-in technology,it may form a pressure increased area of single phase flow around wellbore,shut-in of the wellto test pressure draw down curve is followed by four periods of microfracture pressure test,provided successful operation of tester valve on its first run is guaranteed, each formation parameter of coal reservoir will be accurately obtained.
出处
《油气井测试》
1998年第3期47-48,77,共3页
Well Testing
关键词
煤成气
钻柱地层测试
地层破裂压力
压力降落试井
coal-formed gas, drill stem testing, formation breakdown pressure, pressure drawdown test
