渤中19-6气田潜山变质岩储层类型特征与电成像测井识别

Reservoir type characteristics and identification by electrical imaging logging of buried hill in BZ19-6 Gas Field

渤中19 6气田潜山变质岩储层类型复杂多样,明确不同类型储层特征、准确识别储层类型有利于储层评价。综合利用岩心、实验、测井和测试资料,研究渤中19 6气田潜山变质岩储层的储集空间类型、储层类型、不同类型储层的电成像测井响应特征与储层类型识别方法。结果表明:研究区潜山变质岩储层具有缝、孔双重储集空间,根据储集空间类型和配置关系可将储层类型分为裂缝型储层、孔隙—裂缝型储层和裂缝—孔隙型储层三类。三类储层优势储集空间不同,电成像测井响应差异明显,电成像测井孔隙度谱分析法可较好地区分储层类型,提取、优选电成像孔隙度谱参数P 50和W 80-10,建立储层类型划分图版与标准,实现全井段储层类型识别,与测试资料对比,储层类型识别效果良好。该结果对具有双重储集空间的储层评价具有参考意义,为电成像测井资料的定量分析与运用提供一种思路。

Reservoir types of buried hill metamorphic rocks in BZ19 6 Gas Field are complex and diverse.It is conducive for reservoir evaluation to understand reservoir characteristics of different types and accurately identify reservoir types.Based on core data,experimental data,logging data and testing data,the reservoir space types,reservoir types,electrical imaging logging response characteristics of different reservoir types and reservoir type identification method of buried hill metamorphic rock reservoirs in BZ19 6 Gas Field are studied.The results show that the buried hill metamorphic reservoir in the study area has dual reservoir spaces of fracture and pore.According to the reservoir space types and configuration relationship,the reservoir types can be divided into three types:fracture reservoir,pore-fracture reservoir and fracture-pore reservoir.The three types of reservoirs have different dominant reservoir spaces,and the difference of electrical imaging logging response are obvious.The electrical imaging logging porosity spectrum analysis method can better distinguish reservoir types.Parameters of P 50 and W 80-10 are extracted and optimized from the electrical imaging porosity spectrum.Classification chart and standard of reservoir types are established.The identification of reservoir types are realized in the whole well section,and the results compared with testing data show that the recognition of reservoir types are good.It not only provides a reference for reservoir evaluation with dual reservoir spaces,but also a new idea for quantitative analysis and application of electrical imaging logging data.