自然电位测井评价海拉尔油田变质岩潜山油藏裂缝性储层

海拉尔油田变质岩潜山油藏裂缝发育程度差,有效储层识别难,在油田开发过程出现大量低产低效井,经济有效开发效果差。为进一步挖掘油层潜力,提高油井产量,提出利用自然电位评价海拉尔油田变质岩潜山油藏裂缝性储层的有效性。依据岩心分析、地质特征研究、测井资料、录井资料及生产资料进行综合分析,发现在基质渗透率极低的情况下,自然电位异常主要是有效裂缝导致,根据实际生产资料与自然电位异常幅度的关系,制定有效储层识别标准,并在现场应用中取得较好的效果。该方法适用性强,对油田综合调整有指导意义。

Effectiveness Evaluation of Metamorphic Buried Hill Fractured Reservoir with Spontaneous Potential Logging in Hailar Oilfield

The development of metamorphic buried hill fractured reservoirs is poor in Hailar oilfield,so,it is difficult to evaluate reservoir effectiveness.In the oilfield development process,a large number of low yield wells appear.In order to further explore the potential of oil layers and increase the production of oil wells,we put forward the application of natural potential to evaluate the effectiveness of fractured reservoirs in Hailar oilfield.Based on core analysis,geological characteristics of research,logging data,production data comprehensive analysis,in the case of low permeability,we found that the spontaneous potential anomaly is mainly caused by the effective fractures.According to the relationship between the actual production data and abnormal amplitude of the natural potential,the effective reservoir identification standard is established and practical application effect is good.The method has stronger applicability,and has guiding significance to the comprehensive adjustment of oilfield.