延川南区块深层煤层气井产能主控因素

发布时间：2018-05-02 21:40

本文选题：深层煤层气 + 产能影响因素　；参考：《煤田地质与勘探》2017年05期

【摘要】：深层煤层气井产能高低及影响因素认识不清,制约了其商业化开发进程。对延川南万宝山构造带煤层气生产特征及产能情况进行了总结,从煤层气资源条件、煤层气解吸难易程度和渗流条件3个方面对产能影响因素进行了研究。结果表明,渗透率与含气量是影响产能的主要因素:渗透率大于0.3×10~(-3)μm~2和含气量高于15 m~3/t是稳定产气量大于1 000 m~3/d的前提条件。含气量主要受埋深和水动力条件影响,埋深越大,水动力条件越弱,含气量越高;渗透率主要受地应力、形变和裂缝发育情况控制,低地应力区和局部构造高点附近渗透率较高。根据渗透率与含气量将构造带划分为高渗高含气、高渗低含气、低渗高含气、低渗低含气4个区。其中,高渗高含气区产液量中等,产气能力高;高渗低含气区以异常高产液、低产气井为主;其他两区产液量和产气能力较低。
[Abstract]:The production capacity of deep coalbed methane wells and its influencing factors are not well understood, which restricts the commercial development process of deep coalbed methane wells. The production characteristics and productivity of coalbed methane (CBM) in Wanbaoshan structural belt in southern Yanchuan are summarized. The factors affecting productivity are studied from three aspects: the conditions of CBM resources, the degree of desorption of CBM and the percolation conditions. The results show that permeability and gas content are the main factors affecting productivity: permeability greater than 0.3 脳 10 ~ (-3) 渭 m ~ (-2) and gas content above 15 ~ (3 / t) are the preconditions for a stable gas production rate of more than 1 000 mm ~ (-3) / d. The gas content is mainly affected by the buried depth and hydrodynamic conditions. The larger the buried depth is, the weaker the hydrodynamic condition is, and the higher the gas content is, the permeability is mainly controlled by ground stress, deformation and fracture development. The permeability near the low stress zone and the local tectonic high point is relatively high. According to permeability and gas content, the structural zone is divided into four zones: high permeability and high gas content, high permeability and low gas content, low permeability and high gas content, and low permeability and low gas content. In the high permeability and high gas bearing area, the liquid production is medium and the gas production capacity is high; in the high permeability and low gas content area, the abnormal high yield liquid and the low gas production well are the main ones; the other two regions have lower liquid and gas production capacity.
【作者单位】：中国矿业大学资源与地球科学院;中石油煤层气有限责任公司;中石化华东油气分公司非常规资源勘探开发指挥部;
【分类号】：P618.13;TE37

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