基于构造裂隙填图技术的煤储层裂隙发育特征预测与验证

发布时间：2018-03-01 00:15

本文关键词： 构造裂隙填图破碎等级煤储层构造裂隙煤层气开发　出处：《天然气地球科学》2017年09期 　论文类型：期刊论文

【摘要】：利用构造裂隙填图技术,在新疆阜康白杨河矿区地表围岩中实测了388个观测点,根据观测点构造裂隙的发育特征划分破碎等级,预测了地下煤储层构造裂隙的优势方向和发育特征,并利用6口煤层气井的产量数据、压裂曲线和井径扩大率进行验证。结果表明:地表围岩中观测点破碎等级较高的区块,煤储层内构造裂隙系统发育,天然裂隙联通情况良好,渗透率较高,煤层气井产量较高,压裂曲线的形态以先高后低型和波浪型为主,井径扩大率一般大于15%以上;观测点破碎等级低的区块,煤储层内构造裂隙系统发育不足或严重不足,天然裂隙联通情况较差,渗透率较低,煤层气产量为中产或低产,压裂曲线的形态为上升型,井径扩大率一般小于7%。利用该方法预测煤储层构造裂隙发育特征与工程数据吻合度较高,证明了该方法的有效性和可靠性,为有类似地质条件的煤层气开发区块煤储层裂隙系统预测,提供了一种新思路和新技术。
[Abstract]:Based on structural fissure mapping technique, 388 observation points were measured in the surrounding rock of Baiyanghe mining area in Fukang, Xinjiang. According to the development characteristics of structural fractures in observation points, the fracture grades were classified. The dominant direction and development characteristics of structural fractures in underground coal reservoirs are predicted, and the production data of 6 coalbed gas wells, fracturing curves and hole diameter expansion rate are used to verify the results. The structural fracture system in coal reservoir is developed, the natural fracture is connected well, the permeability is high, the production of coalbed gas well is high, the fracture curve is mainly high first and then low and wave type, the diameter expansion rate is generally more than 15%; The fracture system in the coal reservoir is not developed enough or seriously enough, the natural fracture connection is poor, the permeability is low, the coal bed methane production is middle or low, and the fracturing curve is of ascending type. The expansion rate of well diameter is generally less than 7. It is proved that the method is effective and reliable in predicting the structural fracture development characteristics of coal reservoir and engineering data. It provides a new idea and new technology for prediction of coal reservoir fracture system in coalbed methane development blocks with similar geological conditions.
【作者单位】：河南理工大学资源环境学院;中原经济区煤层(页岩)气河南省协同创新中心;中国地质大学(武汉)资源学院;
【基金】：国家科技重大专项(编号:2016ZX05067006-002)资助
【分类号】：TD841

【相似文献】