塔河油田碎屑岩稠油测试开关井工作制度优化研究

Study on Work System Optimize of Opening and Closing Well for Dense Oil Testing of Clastic Rock in Tahe Oilfield

塔河油田古生界碎屑岩属于稠油油藏,油藏埋藏深、渗透率低、产能低、油质重给测试工作带来较大影响,主要表现在压力恢复资料的导数曲线没有出现径向流,用常规解释软件不能解释地层参数。经分析研究认为,目前影响测试效果的主要原因是测试开关井次数频繁,总测试时间较长,而每次流动和恢复的时间不够。建议最合理的测试工作制度是一开一关,或采用二开二关与助排工艺相结合的测试方法。

Clastic rock of the Palaeosoic in Tahe oilfield belongs to dense oil reservoir whose buried depth is deep, permeability is low, productivity is small and property is weight which brings about much influence on testing work in that the derivative curve of build-up pressure data doesn't appear radial flow and formation parameters can not be interpreted by conventional interpreting software. It is thought that the main reason for influenced result is that times of closing or opening well is too frequent and overall testing time is much long, while each time of flow and build-up is not enough. An reasonable testing work system is once opening and closing or integrated method of twice opening and closing with aiding discharge.