北部凹陷新安村组、乌云组储集层解释评价

Reservoir interpretation and evaluation for Xin'ancun Group and Wuyun Group in northern sag.

方正断陷北部凹陷是大庆油田外围盆地重点勘探地区之一,该凹陷新安村组、乌云组为主要目的层,储集层埋深变化大,受构造、岩性、断层活动的多期性等因素的影响,油水分布特征呈多样性,无统一的油水界面,储集层评价困难。基于这一状况,在实践研究的基础上综合分析了不同储集层的荧光显微图像和热解气相色谱谱图特征,给出了利用岩石热解含油气总量与原油轻重组分指数初步评价储集层的判别标准和根据含油气总量与测井孔隙度解释评价储集层的交会图板。实例分析表明,应用上述方法可实现该地区不同储集层的有效解释评价。

The northern sag of Fangzheng aulacogen is one of the focus exploration regions in Daqing Oilfield peripheral basins,Xin'ancun Group and Wuyun Group of the sag are the main purpose layers,the reservoir depths change greatly.By the influence of the structure,lithology,multi-phase fault movement and the other factors,oil and water distribution characteristics showed the diversity and there was no unified oil-water interface, reservoir evaluation is difficult.Based on this situation and the practice of research,the authors comprehensively analyzed the fluorescence microscopic images and pyrolysis gas chromatography spectrum characteristics for the different reservoirs,and gave out the preliminary criteria of reservoir evaluation by using rock pyrolysis oil and gas total amount and light and heavy hydrocarbon component index for crude oil, and the interpretation and evaluation intersection plate which was based on the total oil-gas amount and well logging porosity.The analyses showed that the application of the above methods can achieve the effective interpretation and evaluation for the different reservoirs.