毛管压力曲线在低阻储层中的应用

Application of capillary pressure curve in low resistivity layers

毛管压力曲线反映了在一定驱替压力下水银进入岩样孔隙喉道的大小及这种喉道的孔隙容积,因此,通过毛管压力曲线可以对储集层的孔喉结构进行研究。以文昌13-1/2油田珠江组一段(ZJ-1)典型低阻油气层为例,通过对其取心样品的毛管压力曲线分析以及和油田珠江组二段(ZJ-2)良好储层的对比,研究结果发现:不同毛管压力曲线可以反映不同的孔喉结构,并能对储层低电阻率成因进行很好的解释,扩大了毛管压力曲线在储层地质评价中的应用。

Capillary pressure curves show the mercury intruding the size into pore-throat and volume of porosity under special pressures. So the pore structures can be researched by the capillary pressure curves. The paper takes the low resistivity layers of Zhujiang formation one（Z J-1 ）of Wenchang 13-1/2 Oilfield in Zhujiang Basin as an example. Based on capillary pressure curves from the core samples and compared with the good reservoir of ZJ-2,it is shown ces show that different capillary pressure curves can reveal different pore structures and interpret the causes of low resistivity layers well , thus enlarging the application of capillary pressure curves in reservoir geology research field.