CAJ | 학술논문

煤储层压力是影响煤层气产能的重要因素之一。基于比德—三塘盆地200多个水文地质钻孔的数据统计，根据水头高度计算了煤层的等效储层压力及压力系数，分析了等效储层压力在横向和纵向上的分布规律。研究表明：等效储层压力在整个盆地以欠压—正常压力状态为主，局部地区出现了异常高压状态。横向上，等效压力系数变化范围为0.3~1.5，等效储层压力状态以欠压—正常压力为主，局部地区如阿弓向斜、珠藏向斜和水公河向斜局部出现了异常高压状态，在白泥菁向斜附近地层为欠压状态。纵向上，在埋深280 m以浅，等效压力系数为0.1~1.5，以欠压—正常压力储层为主；在埋深280~600 m，储层压力系数几乎集中在0.9~1.1，为正常压力储层。
매저층압력시영향매층기산능적중요인소지일。기우비덕—삼당분지200다개수문지질찬공적수거통계，근거수두고도계산료매층적등효저층압력급압력계수，분석료등효저층압력재횡향화종향상적분포규률。연구표명：등효저층압력재정개분지이흠압—정상압력상태위주，국부지구출현료이상고압상태。횡향상，등효압력계수변화범위위0.3~1.5，등효저층압력상태이흠압—정상압력위주，국부지구여아궁향사、주장향사화수공하향사국부출현료이상고압상태，재백니정향사부근지층위흠압상태。종향상，재매심280 m이천，등효압력계수위0.1~1.5，이흠압—정상압력저층위주；재매심280~600 m，저층압력계수궤호집중재0.9~1.1，위정상압력저층。
The coal reservoir pressure is one of major factors impacts CBM capacity. On the basis of Bide-Santang Basin 200 more hy?drogeological boreholes data statistics, according to hydraulic head estimated coal seam equivalent reservoir pressure and pressure coef?ficient, analyzed equivalent reservoir pressure distribution pattern transversely and longitudinally. The study has shown that the equiva?lent reservoir pressure is mainly in under-normal pressure status in the whole basin, locally appeared as abnormal pressure. Trans?versely, variation range of equivalent pressure coefficient is 0.3~1.5, equivalent reservoir pressure status mainly under-normal pres?sure, local areas such as in the Agong, Zhuzang and Shuigonghe synclines appeared abnormal pressure, strata near the Bainijing syn?cline under pressure. Longitudinally, above the 280m buried depth, equivalent pressure coefficient is 0.1~0.5, mainly under-normal pressure;within 280~600m buried depth, reservoir pressure coefficient almost concentrated within 0.9~1.1, thus normal pressure reser?voir.