松辽盆地深层火山岩储层测井响应及地质解译

Log Responses and Its Corresponding Geological Interpretation of Deep Volcanic Reservoir in Songliao Basin

为研究测井信息与地质属性的对应性,利用丰富的岩心描述结果刻度测井资料,对12种常见火山岩常规测井和8种成像测井图像进行地质解译。结果表明,火山岩地质属性的测井响应具有普遍性。常规测井中自然伽马和密度曲线对基、中、酸性火山岩响应明显,电阻率和三孔隙度曲线对火山岩的结构构造及孔缝响应明显。成像测井模式具体为:凝灰结构表现出高阻亮点模式,原生气孔表现出低阻暗点模式,流纹构造表现出中高阻黄白相间的正弦曲线模式,角砾结构表现出高阻亮块和低阻暗点模式,低角度裂缝表现出低阻正弦曲线模式,沉火山角砾结构表现出中低阻黄橙相间正弦曲线模式,火山碎屑溶孔表现出亮块中含暗点模式,块状结构表现出亮块模式。

In order to study the correspondence between logging information and geological property,we use laboratory data to calibrate logging data,and develop geological interpretation model between petrology and 12 traditional logging concerning common volcanic rocks,as well as 8 FMI methods.The results show that the characteristics of log response from volcanic rocks are common;basic,intermediate and acid volcanic rocks can be distinguished by GR and density curves;resistivity and three porosity curves have a significantly response to texture,structure and aperture.Imaging modes of 8 kinds are summarized as following.Tuff structure shows high-resistance and highlight spot mode.Primary stomata shows low-resistance and dark spots mode.Rhyolite structure shows yellow and white and mid-high-resistance and sine curve mode.Breccia structure shows high resistance light block and low resistance dark spots mode.Low angle fracture shows low resistance sine curve mode.Sedimentary volcanic breccia structure shows yellow and orange mid-low resistance sine curve mode.Pyroclastic solution pores show light block containing some dark spot mode.Massive structure shows light block mode.