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致密砂岩储层岩石矿物成分复杂、储层物性差,准确识别储层岩性及矿物成分是进行物性评价的关键。多矿物解释模型以最优化解释为目标,在充分利用已有测井信息的基础上,可识别出多种岩石矿物组分及其相对含量,并可获得储层孔隙度等物性信息。由此得到的矿物组成还可判断岩石脆性特征,从而为开发中水力压裂的设计提供参考依据。B区块致密砂岩储层的常规测井响应特征不能良好反映储层特性,而通过应用多矿物解释模型对该区储层岩性及物性特征有较好的评价效果。
The composition of rock and mineral in tight sandstone reservoirs is complex and the reservoir properties are poor. It is the key to evaluate the lithology and mineral composition of reservoir accurately. The multi-mineral interpretation model aims at optimal interpretation. Based on the full utilization of available well logging information, various rock mineral components and their relative contents can be identified, and physical properties such as reservoir porosity can be obtained. The mineral composition obtained can also judge the brittleness of rock and provide a reference for the design of hydraulic fracturing in development. The conventional logging response characteristics of tight sandstone reservoirs in Block B can not well reflect the characteristics of reservoirs, but the evaluation of reservoir lithology and physical properties in this area is well evaluated by applying the multi-mineral interpretation model.