准噶尔盆地碎屑岩储集层可动流体的精细评价  

Application of movable fluid fine assessment of clastic reservoirs in Junggar Basin

作　　者：李晨 薛晓军 王晨 李秀彬 解俊昱 金庭科 LI Chen;XUE Xiaojun;WANG Chen;LI Xiubin;XIE Junyu;JIN Tingke(XDEC Geological Research Institute of CNPC,Kelamayi,Xinjiang 834000,China)

机构地区：[1]中国石油西部钻探地质研究院

出　　处：《录井工程》2020年第1期79-84,90,共7页Mud Logging Engineering

摘　　要：准噶尔盆地常规碎屑岩储集层的油水关系复杂制约了勘探成效,主要表现为油水比例以及流体在微观孔隙结构中的赋存状态不清楚。针对常规碎屑岩储集层精细化评价难度大的特点,通过荧光薄片显微镜下的观察,以图像为基础,以计算机图像处理技术为工具,对碎屑岩储集层微观荧光的显示特征进行定义、分类和描述,通过岩心显微荧光薄片数字化应用系统进行数字化处理,确定荧光发光颜色分级标准,自动实现荧光面积可视化处理及定量化计算,自动输出成果报告,最终得到定量化数据。通过岩石物理实验分析确定T2截止值,鉴于该值在T2谱上的位置与T2谱形态、T2谱峰值位置关系密切,建立了一种基于T2谱形态特征的与离心实验相结合的T2截止值确定方法,准确求取核磁参数。现场实际应用表明,利用核磁实验得到的实验数据与显微荧光敏感参数相结合,通过敏感参数法、图形法对储集层及流体赋存状态进行评价运用效果较好。The exploration effect of conventional clastic rock reservoirs in Junggar basin was restricted by the complex oil-water relationship. The main manifestations are vague oil-water ratio and occurrence of fluid in micropore structure. Aiming at the difficulty of fine assessment of conventional clastic reservoirs, through the microscopic observation of fluorescence slices, based on images and computer image processing techniques, the display characteristics of clastic reservoirs micro-fluorescence were defined, classified and described. The core micro-fluorescence slice digital application system was used for digital processing to determine the fluorescence emission color grading standards, automatically realizing the visualization and quantitative calculation of fluorescence area and automatic output of fluorescence image results report, finally obtaining quantitative data. T 2 cutoff value, whose position on T 2 spectrum is closely related to T 2 spectrum morphology and T 2 spectrum peak position, was determined by petrophysical experiment. To this end, a method for determining T 2 cutoff value based on combination of T 2 spectrum morphology characteristics and centrifugation experiments was established to accurately obtain NMR parameters. The data obtained from NMR experiment was combined with micro-fluorescence sensitive parameters. The reservoir and fluid occurrence states were evaluated by sensitive parameter method and graphic method. The field application shows that it is effective to evaluate the reservoir and fluid state by using the methods of sensitive parameter and figure, which is based on the combination of the data obtained from NMR experiment and micro-fluorescence sensitive parameter.

关 键 词：碎屑岩 显微荧光 核磁参数 图像特征 T2截止值 流体赋存状态 

分 类 号：TE132.1[石油与天然气工程—油气勘探]