自然电位测井技术对矿物储层裂缝敏感性分析

Sensitivity analysis of spontaneous potential logging technology to fracture of mineral reservoir

针对传统方法对矿物储层裂缝敏感性分析准确性较低的问题,为此提出对自然电位测井技术对矿物储层裂缝敏感性分析研究。自然电位测井技术以矿物储层中的溶液离子与泥浆中的电离子发生交换而产生的电动势为判断依据,当计算出的矿物储层中扩散电动势大于自然电位系数时,说明矿物储层裂缝敏感性良好,测井内存在有效裂缝;相反矿物储层中扩散电动势小于自然电位系数,说明矿物储层裂缝敏感性较差,测井内存在有效裂缝。经试验证明,自然电位测井技术能准确的分析出矿物储层裂缝敏感性。

In view of the low accuracy of traditional methods in fracture sensitivity analysis of mineral reservoirs,this paper puts forward the research on the fracture sensitivity analysis of mineral reservoirs by spontaneous potential logging technology.The spontaneous potential logging technology is based on the electromotive force generated by the exchange of solution ions and mud ions in the mineral reservoir.When the calculated diffusion electromotive force in the mineral reservoir is greater than the spontaneous potential coefficient,it indicates that the fracture sensitivity of the mineral reservoir is good,and there are effective fractures in the logging;on the contrary,the diffusion electromotive force in the mineral reservoir is less than the spontaneous potential coefficient,indicating that The fracture sensitivity of mineral reservoir is poor,and there are effective fractures in logging.It has been proved that SP logging technology can accurately analyze the fracture sensitivity of mineral reservoir.