沁水盆地安泽区块煤储层含气性特征及其构造控制

发布时间：2018-05-03 18:43

  本文选题：构造 + 含气量　； 参考：《地学前缘》2017年06期

【摘要】：基于安泽地区的二维地震资料、测井数据和完井数据,分析了该地区煤储层含气性特征及构造对含气量的影响,分别从剥蚀量、上覆有效地层厚度、断层三个方面进行研究。结果表明:安泽地区经历印支期、燕山期、喜马拉雅期三个时期构造运动,总剥蚀量为2 200~3 300m。安泽地区剥蚀量西部小、保存条件较好,对应含气量较高。剥蚀量东部大、保存条件较差,对应含气量较低。在构造影响较弱区,煤层含气量随上覆有效地层厚度的增加而逐渐增高。断层的控制范围在500m,距离断层500m以内的地区含气量低于距离断层超过500m的地区。同一条断层下降盘较上升盘有更好的封盖能力,含气量相对高。安泽地区的断层构造样式中地堑、掀斜断块和逆断层是较好的储气环境,而地垒不利于煤层气保存。
[Abstract]:Based on the two dimensional seismic data, logging data and completion data in Anze area, the gas bearing characteristics of coal reservoir and the influence of structure on gas content in this area are analyzed, respectively, from the aspects of denudation amount, overlying effective formation thickness and fault. The results show that Anze area experienced three periods of tectonic movement, including Indosinian period, Yanshanian period and Himalayan period, with a total denudation of 2 200 ~ 3 300 m. In Anze area, the denudation amount in the west is small, the preservation condition is better, and the corresponding gas content is higher. The denudation amount in the eastern part is large, the preservation condition is poor, and the corresponding gas content is lower. In the area with weak tectonic influence, the gas content of coal seam increases with the increase of overlying effective stratum thickness. The fault control range is 500m, and the gas content in the area less than 500m from the fault is lower than that over 500m from the fault. The same fault descending plate has better sealing ability than the rising plate, and the gas content is relatively high. Graben, tilted fault block and reverse fault are the better gas storage environment in the fault structural style of Anze area, while the barrier is not conducive to the preservation of coalbed gas.
【作者单位】： 中国地质大学(北京)煤层气国家工程中心煤储层实验室;中国地质大学(北京)能源学院;
【基金】：国家自然科学基金项目(41472137,41602170) 山西省煤基重点科技攻关项目(MQ2014-01)
【分类号】：P618.13
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本文编号：1839646