Abstract:

Based on the EMI data, geologic information and conventional logging data, the validity and permeability of the fractured reservoirs in the volcanic rocks of the area of Gu-16 wellare evaluated. The result shows: there are two primary reservoir interspaces, the fracture and the matrix dissolved pore in the volcanic rocks. The reservoir pattern mainly includes: the directly interconnected fractures type and the indirect interconnected pore-fractures type. The reservoir type includes: the low-pore-fracture type and the pore-fracture type. The matrix porosity is 2%-22% or so and the fractured porosity is 0.01%-0.08% in volcanic rock reservoir, so volcanic rock reservoir is low porosity and low permeability reservoir. It is distributed beneath less than 250 meters of unconformable face, which is on the middle and upper areas of volcanic rock.

Key words: volcanic reservoir, the validity, permeability, Gu-16 well area