School of Resources and Geosciences,China University of Mining and Technology Xinjiang Institute of Engineering

为了探究水文地质条件对褐煤储层含气性的影响以及水压的准确计算,选择吐哈盆地南部地区对褐煤储层的水文地质条件进行研究,揭示其水文地质控气特征;根据水密度所受的量化因素,利用水密度与水压之间的耦合关系得出水压的计算值,并与不考虑密度变化的值进行比较,结果表明:吐哈盆地南部褐煤储层由于补给、径流条件较差造成地下水滞流、矿化度为9 330~35 000 mg/L,次生生物气生成受阻,而埋深较深的区域保存条件较好,可保存地史期生成的原生或次生生物气;水密度受温度、压力、矿化度等的影响,导致考虑其变化的水压与不考虑其变化的水压有一定的差别。

In order to study the hydrogeological conditions affected to the coalbed methane potential of the lignite reservoir and the accurate calculation of the water p ressure,the south part of Tuha Basin was selected for the study on the hydrogeological condition of the lignite reservoir and the gas control features of the hydrogeological condition were revealed. According to the water density affected by the quantitative factors,a calculated value of the water pressure was obtained with the coupling relation ship between the water density and the water pressure and a comparison was conducted on no consideration of the density varied value. The results showed that due to p oor water supply and runoff condition,the lignite reservoir at the south part of Turpan- Hami Basin would cause the underground water stagnation,high mineralization degre e 9 330 ~ 35 000 mg/ L and gas formation resistance of secondary organism. But in the deep depth area,the holding condition was good and could keep the primary or sec ondary biogas generated in the geohistory period. The water density was affected by the temperature,pressure,mineralization degree and others and thus there was certain difference between the varied water pressure value considered and the varied water pressure value not considered.

国家自然科学基金资助项目(41272177)；新疆维吾尔自治区科技计划资助项目(2013911039)；