煤储层渗透率与煤层气垂直井排采曲线关系  

The relationship between the permeability of coal bed and production curve about coal-bed methane vertical wells

作　　者：倪小明[1] 苏现波[1] 魏庆喜[1] 吴建光[2] 

机构地区：[1]河南理工大学能源科学与工程学院,河南省生物遗迹与成矿过程重点实验室,河南焦作454000 [2]中联煤层气有限责任公司,北京100011

出　　处：《煤炭学报》2009年第9期1194-1198,共5页Journal of China Coal Society

基　　金：河南省重大公益性科研项目(081100910500);长江学者和创新团队发展计划(IRT0618);河南省生物遗迹与成矿过程重点实验室开放基金资助项目(otmp0804)

摘　　要：根据岩石弹性理论分别建立了天然裂隙面上、最大水平主应力方向上形成裂隙的极限压力模型,绘制了压裂过程主裂隙延伸轨迹示意图;根据原始渗透率与改造后渗透率的关系,结合压裂主裂隙几何形态特征,绘制了不同渗透率关系下排采过程压力传播轨迹示意图;根据煤储层原始渗透率、压裂后渗透率不同情况下压力传播轨迹的不同,得出煤层气垂直井排采的"增—减—增"、"增—减"、"增—增"和"增—减—猛增"等4种典型排采曲线.Based on the elasticity theory of the rock, ultimate press models about the form of interstice were established in the directions of the natural fractures and the maximal horizontal stress, the sketch map about interstice extended contrail in the process of the fracture was draen. According to the relation between the original coal bed permeability and the transformed permeability, combined with fractural morphology character, the sktech maps about the pressure spread contrail in the process of the drainage in the different permeability was drew. According to the different of the pressure spread contrail on the different original permeability and the permeability after fracturing, four kinds of drainage cruve about coal bed methane vertical wells were drawn, there are ＂increasing-reduction-increasing＂, ＂increasing-reduction＂, ＂increasing-increasing＂ and ＂increasing-reduction-jump＂.

关 键 词：渗透率 煤层气 垂直井 排采曲线 

分 类 号：P618.11[天文地球—矿床学]