CAJ | 학술논문

基于DST法和注入压降法在煤层气试井中的特点，利用煤层气试井专用设备对同一口井进行DST试井和注入压降试井，根据其工程实践结果，对比分析了两种方法在技术理论、专用设备实用性等方面的优缺点。分析结果显示：煤层气试井DST法具有测试成本低、测试的探测半径小、储层压力准确等特点，其专用设备具有操作简单、可靠性高等特点；煤层气试井注入压降法具有测试的探测半径大、可获得地层应力参数等特点，其专用设备具有适应性强、测试成功率高等特点；两种方法各有优势，可根据工程需求选择使用。
기우DST법화주입압강법재매층기시정중적특점，이용매층기시정전용설비대동일구정진행DST시정화주입압강시정，근거기공정실천결과，대비분석료량충방법재기술이론、전용설비실용성등방면적우결점。분석결과현시：매층기시정DST법구유측시성본저、측시적탐측반경소、저층압력준학등특점，기전용설비구유조작간단、가고성고등특점；매층기시정주입압강법구유측시적탐측반경대、가획득지층응력삼수등특점，기전용설비구유괄응성강、측시성공솔고등특점；량충방법각유우세，가근거공정수구선택사용。
Based on characteristics of DST method and injection/pressure drawdown method in CBM well tests, using CBM well test spe?cific installations carried out testing using both methods in a same well. According to tested results, have comparatively analyzed the pros and cons of both methods on aspects of technical know-how, specific installation practicability etc. The result has shown that DST method has characteristics of low cost, small investigation radius, exact reservoir pressure, specific installation easy to operate and high reliability etc.;injection/pressure drawdown method has characteristics of large investigation radius, formation stress parameters avail?able, specific installation well adapted, high rate of success etc. The two methods each has own advantages thus optional based on proj?ect requirements.