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对于碳酸盐岩储层来说,裂缝发育与否对产能有着重要的控制作用。裂缝不仅是重要的储集空间,而且是良好的渗流通道,还控制着溶孔(洞)的发育,这类储层有强烈的非均质性、复杂的岩性及储集空间。研究发现,目前碳酸盐岩储层天然气的聚集及产出主要依赖于裂缝系统。因此,能否准确识别碳酸盐岩储层中的裂缝显得尤为重要,而利用低成本的常规测井资料识别裂缝是提高碳酸盐岩天然气开发能力的重要途径。以某气田为例,结合成像测井资料,提取了识别裂缝的相应敏感参数,并总结出了常规测井资料识别裂缝的方法技术,选取典型井结合试气数据对裂缝型储层进行了综合分析,效果较好,说明利用常规测井资料来识别裂缝是经济可行的。
For carbonate reservoirs, the development of fractures plays an important role in controlling productivity. Cracks are not only important reservoir spaces, but also good seepage channels, which control the development of dissolved pores (holes). Such reservoirs have strong heterogeneity, complex lithology and reservoir space. The study found that the current accumulation and output of natural gas in carbonate reservoirs mainly depend on the fracture system. Therefore, it is very important to accurately identify the fractures in carbonate reservoirs. However, the use of low-cost conventional logging data to identify fractures is an important way to improve the capacity of carbonate natural gas exploration. Taking a gas field as an example, with the help of the imaging logging data, the corresponding sensitive parameters for identifying fractures are extracted, and the methods for identifying fractures by conventional well logging data are summarized. The fractured reservoirs are selected by taking the typical wells and gas test data Analysis, the effect is better, indicating that the use of conventional logging data to identify cracks is economically viable.