赵凹油田泌304区浅层砾岩稠油储量分类评价及应用

Reserves classification evaluation and application of shallow sandy conglomeratic heavy oil of Bi 304 block in Zhaowa oilfield

泌304区位于泌阳凹陷南部陡坡带,该区储层具有复模态孔隙结构、毛管阻力大、蒙脱石含量高、非均质性严重等特点,致使本区在前期的试油、压裂试采等产能评价中没有取得突破。为此,从岩心观察分析入手,结合含油性和对应的电性响应特征规律,建立了本区的储层分类评价标准,分别从含油性、岩性、物性进行了平面分类,再综合分类研究,把储量划分出了四类,并对Ⅰ类储量区域进行了验证,取得了该区的产能突破。

Situated in the southern steep slope zone of Biyang depression,Bi-304 block is of the characteristics of complex mode pore structure,big capillary resistance,high content of montmorillonite and serious homogeneity,which makes it hard to make breakthrough in productivity evaluation such as early testing and fracturing production.Therefore,starting from core observation,in combination with oil-bearing characteristics and corresponding electric response characteristics,classification standards of the reservoirs in this area has been established.From the characteristics of oil-bearing,lithology and physical properties,four types have been classified.The application in type-I reserves achieves good effect in productivity breakthrough.