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中东×区H油田发育孔隙型生物碎屑灰岩,储集空间复杂,发育有粒间孔、生物体腔孔等原生孔隙和溶蚀孔、铸模孔等次生孔隙,次生孔隙发育情况与储层产能、渗流性能等密切相关。结合岩心及测井资料建立储集空间类型识别方法,采用高斯函数拟合成像测井孔隙度谱,得到原生和次生孔隙的截止值及占比;分析三孔隙度测井和核磁共振测井响应与原生和次生孔隙占比的关系,建立了次生孔隙占比的测井计算模型。研究表明,结合储集空间类型确定成像测井孔隙度谱原生和次生孔隙截止值及占比,用于常规测井刻度,建立常规测井计算次生孔隙占比方法,2种方法计算结果相近,表明所建方法表征生物碎屑灰岩储集空间的有效性,为储集空间的定量表征提供了新思路。
The Middle East H Zone has a porous bioclastic limestone with complicated reservoir space, primary porosity and dissolution pores such as intergranular pores, biological pores, and secondary pores such as pores in mold cavity, and the development of secondary porosity and reservoir Production capacity, seepage performance is closely related. Based on the core and well logging data, a reservoir space type identification method was established. Gaussian function was used to fit the imaging logging porosity spectrum to obtain the cut-off value and proportion of primary and secondary pores. The analysis of three-porosity logging and NMR logging In response to the relationship between primary and secondary porosity, a logging calculation model of secondary pore fraction was established. The results show that the primary and secondary porosity cut-off values and their proportions are determined according to the type of reservoir space and used for conventional log calibration, and the conventional log calculation of secondary porosity fraction is established. The results of the two methods The results show that the proposed method can be used to characterize the bioclastic limestone reservoir space and provide a new idea for the quantitative characterization of reservoir space.