东北长岭凹陷中生界多矿物储层油气识别方法

On Oil and Gas Identification in Multi-mineral Reservoirs of Mesozoic Group in Changling Seg,Northeast China

东北长岭凹陷中生界青山口组油藏和营城组气藏油气储层与其它常规油气储层相比地质成因复杂,岩性由多种矿物成份组成,并具有低孔隙度、低渗透率的特点。运用双孔隙度(t、w)模型为理论基础,建立了一种能适应该地区地层特点的油气层识别方法,解决了在复杂地质条件下识别油气层的目的。该方法不但在井场快速直观解释和室内预处理中显著提高工作效率,而且提高储层定量分析和综合评价中油气识别准确率。该方法在长岭地区腰英台油田和大情字地区达尔罕构造气藏进行了测井分析应用,已取得了显著的效果。

At present, Qingshankou and Yingcheng oil pools of Mesozoic group in Changling Seg, Northeast China are more complicated compared with other conventional hydrocarbon reservoirs＇ geologic geneses. Their lithologies are composed of many mineral compositions with low porosity and low permeability. In this article, based on double-porosity model （φt,φw）, we established a method which can identify hydrocarbon reservoir suitable to this area. This method not only improves work efficiency in quicklook interpretation at wellsite and data pre-processing in office, but also enhances identification accuracy in quantitative analysis and comprehensive assessment. We have used this method in logging analysis in Yaoyingtai oilfield of Changling area and Daerhan gas pool of Daqingzi area and gained distinct effect.