ISO瞬时开关阀在煤层气井测试中的应用

Application of ISO Instantaneous Valve in Coal Gas Well Test.

煤层气井进行单相注入 压降测试 ,同一口井有多个测试层位时 ,使用DST设备需要多次起下管柱。使用ISO瞬时开关阀 ,可实现一趟管柱对多个测试层段进行分层测试 ,且能满足微破裂应力测试所要求的在极短时间内进行开关井操作的需要 ,它与井口压力监测装置配合可以掌握测试资料是否合格 。

For single phase injection/draw-down test in coal gas wells, when there are several test zones in the same well, using DST equipment requires the test string to be tripped in and out several times; If an ISO instantaneous valve is used, it is possible toconduct zonal tests to several intervals with one trip of string, and it is also able to satisfy the needs of well opening and shutin operation in very short time, which is required by microcrack stress test; integrated with wellhead pressure monitoring system, it may find out whether the test data are qualified and determine the next step operation sequence in time.