煤田地质与勘探
煤田地質與勘探
매전지질여감탐
COAL GEOLOGY & EXPLORATION
2010年
1期
29-32
,共4页
煤层气含量%连续观测%加温解吸%快速测定
煤層氣含量%連續觀測%加溫解吸%快速測定
매층기함량%련속관측%가온해흡%쾌속측정
CBM content%continuous measurement%desorption by raising temperature%rapid determination
煤和煤层气地质勘探需要在取到钻孔煤心后的很短时间内获得气含量测值,而现行的煤层气含量测定方法难以满足此要求.基于自然解吸法原理和方法,以自然解吸法的测定结果为基准,在保证解吸量、气组成及其含量基本不变的前提下,通过连续观测、适当提高解吸温度等途径,合理、有效地加速解吸.以快速测定法与自然解吸法的对比试验结果为依据,建立了煤层气含量快速测定方法.此方法将煤层气含量测定周期缩短为几h～几d,可以满足煤和煤层气勘探的需求.
煤和煤層氣地質勘探需要在取到鑽孔煤心後的很短時間內穫得氣含量測值,而現行的煤層氣含量測定方法難以滿足此要求.基于自然解吸法原理和方法,以自然解吸法的測定結果為基準,在保證解吸量、氣組成及其含量基本不變的前提下,通過連續觀測、適噹提高解吸溫度等途徑,閤理、有效地加速解吸.以快速測定法與自然解吸法的對比試驗結果為依據,建立瞭煤層氣含量快速測定方法.此方法將煤層氣含量測定週期縮短為幾h～幾d,可以滿足煤和煤層氣勘探的需求.
매화매층기지질감탐수요재취도찬공매심후적흔단시간내획득기함량측치,이현행적매층기함량측정방법난이만족차요구.기우자연해흡법원리화방법,이자연해흡법적측정결과위기준,재보증해흡량、기조성급기함량기본불변적전제하,통과련속관측、괄당제고해흡온도등도경,합리、유효지가속해흡.이쾌속측정법여자연해흡법적대비시험결과위의거,건립료매층기함량쾌속측정방법.차방법장매층기함량측정주기축단위궤h～궤d,가이만족매화매층기감탐적수구.
It iS usually required that the gas content determined on coal cores is delivered rapidly ln the course of coal and coalbed methane(CBM)exploration.However,the existing method of CBM content determination is hard to meet the requirement.Based on the principle and methodology of CBM natural desorption,on the basis of the result of natural desorption,and under remaining the desorbed volume,gas composition and its content basically unchanged,the gas desorption rate is sped up reasonably and effectively by the use of continuous measuring and appropriately raising desorption temperature.Taking the determination analog between the rapid method and conventional natural desorption as a basis,the method of the rapid CBM content determination is built up.Comparatively,the application of rapid method will shorten the determining period to several days or even several hours,which is able to meet the demand for coal and CBM exploration.
