荧光显微图像录井定性识别与定量解释评价

Qualitative identification and quantitative interpretation and evaluation for fluorescence micrograph logging technique

荧光显微图像录井是录井行业近年来广泛应用的一项新技术,但由于不同油田、不同地区、不同油质储集层的图像特征各异,且量化解释评价难度大,其应用效果有一定的局限性。为了克服这种局限性,以大庆长垣以东地区扶杨油层为例,在统计分析的基础上,分别得出了不同沥青质及不同油质储集层的荧光显微图像定性识别特征;在分析反映荧光图像特征参数意义的基础上,结合主要特征参数的统计分析,提出了油质波长与发光面积之比和油质与胶质色差量化解释评价图板。实例分析表明,定性识别与量化解释评价图板结合应用效果良好,解释评价符合率接近90%;同时分析认为,该方法对于其他油田和地区的应用具有一定的参考价值。

Fluorescence micrograph technique is a new technique that has been widely used in mud logging industry in recent years, but its application effect has a certain limitations because the graph characteristics are little different for the reservoirs in the different oil fields, different regions and different oiliness and the difficult is great for quantitative interpretation and evaluation. To overcome this limitation and on the basis of statistical analysis of the adopted sample of Fuyang oil zone which is located to the east of Daqing Changyuan, the qualitative identification characteristics for fluorescence micrograph were respectively obtained from the reservoirs of different asphaltene and oiliness. Under the conditions of analyzing the meanings of parameters that reflect fluorescence image features and combining with statistical analysis of main characteristic parameters, the author put forward a quantitative interpretation and evaluation chart which could reflect the ratio of oiliness wave length to luminous area and the color difference between oiliness and gum. The sample analyses indicate the coincidence rate of interpretation and evaluation is close to 90 % in the combination use of the qualitative identification with the quantitative interpretation and evaluation chart, and the application results are good. This method has a certain reference value for the other oilfields and regions.