The Experimental Investigation of the Development Potential of Low-Permeability Reservoirs in the Daqing Oilfield

Figure 1

Images of pore structure using polarizing microscopy and scanning electron microscopy.

(a) Sample M125 (depth: 1828.96 m)

(b) SampleM138 (depth: 1837.70 m)

(c) Intercrystalline pores

(d) Residual intergranular pore

(e) Tubular throat