低压煤储层注入/压降试井存在的问题及方法研究  

Problem in Injection / Fall Well Test to Low Pressure Coal Reservoir and Its Method

作　　者：安杰 杨振东 柳光伟 朱国良[3] 陈勇[3] 

机构地区：[1]黑龙江省煤田地质测试研究中心,黑龙江哈尔滨150046 [2]远东能源(百慕大)有限责任公司,北京100027 [3]华北油田采油二厂,河北霸州065709

出　　处：《油气井测试》2014年第2期15-17,76,共3页Well Testing

摘　　要：注入/压降试井的一个重要前提是测试在储层"平衡"状态下开始。而低压储层往往在取芯(打开目的储层后)、扩孔、测井及测试过程中均暴露在"过平衡"状态下。在这些施工过程中,往往会出现渗透性煤层液体漏失,并持续对地层造成伤害,规模可能高达几十方。常规的试井分析由于忽略上述过程,会得到异常的渗透率、表皮因子及储层压力。现提出用变产量叠加函数法对低压煤储层井试井资料进行分析,取得了很好效果,并验证了该方法的适用性。An important prerequisite for injection / fall well testing is that the test operation begins at reservoir'balanced ' state. The low-pressure reservoirs are often exposed to the'over-balanced' state during processes of coring( after the target reservoir opened),reaming,logging and testing. During those operation processes,it often appears that liquid of permeable coal layer is leakage,and it continuously injuries on the formation,the scale of it may be up to several tens of square. For ignoring the above process of conventional test analysis,abnormal permeability,skin factor and reservoir pressure are obtained. Now,it is proposed of using variable yield superposition function method analyzing for well test data of low-pressure coal reservoir,which achieves a good result,and verifies the applicability of this method.

关 键 词：低压煤储层 注入 压降试井 过平衡状态 变产量 叠加函数法 

分 类 号：TE353[石油与天然气工程—油气田开发工程]