CAJ | 학술논문

针对目前煤层气损失气量无法计算煤层的溶解气和游离气含量问题,根据烃类气体进入钻井液的方式和分布状态理论,基于气测录井资料,提出了计算煤层气损失气量的新方法——全脱分析法.通过沁水盆地枣园区块3号煤层的实际应用,发现该方法计算的损失气量明显高于常规煤心样品的回归结果,前者一般为后者的1.5~4.5倍.该方法不仅能有效地解决煤层气损失气量计算中忽视的溶解气和游离气问题,而且还能消除损失时间的影响,同时也可以按不同部位计算煤层气损失气量.该方法适用于不同煤级、各种结构的煤岩,数据易采集,计算过程简单,有很好的应用前景.
침대목전매층기손실기량무법계산매층적용해기화유리기함량문제,근거경류기체진입찬정액적방식화분포상태이론,기우기측록정자료,제출료계산매층기손실기량적신방법——전탈분석법.통과심수분지조완구괴3호매층적실제응용,발현해방법계산적손실기량명현고우상규매심양품적회귀결과,전자일반위후자적1.5~4.5배.해방법불부능유효지해결매층기손실기량계산중홀시적용해기화유리기문제,이차환능소제손실시간적영향,동시야가이안불동부위계산매층기손실기량.해방법괄용우불동매급、각충결구적매암,수거역채집,계산과정간단,유흔호적응용전경.
Aiming at the problem that dissolved gas content and free gas content can not be calculatd by lost gas content, based on gas logging data, a new method, named total degassed hydrocarbon analysis, was proposed for computing lost coalbed methane. In the practical application of the method for the No.3 coal seam in Qinshui basin, it was found that the lost gas content obtained by this method was significantly higher than that by conventional coal core sample regression method, and the former is generally 1.5 to 4.5 times higher than the later. In one hand this method can not only effectively solve the problem ignoring of dissolved gas and free gas in coalbed gas content calculations, but also eliminate the impact of lost time. In addition this method is able to calculate the lost gas for dif-ferent coal seam parts. This method is promising in lost gas calculation because it is easy to collect data, has simple calculation process and is widely applicable in coal with different rank and various structures.