With the assistance of R-factor&Q-factor analysis,we select the parameters to evaluatethe quality of pore structure,and set the standard with the value of R_M more than 0.15μmand the value of C fewer than 0.45 to ascertain(poor)reservoir rocks.
Gaoyou sag is of abundant petroleum resources andsuperior petroleum geologic conditions. There arethree source rocks, nine reservoir rocks, three regionalcaprocks and several reginal caprocks, seven favor-able reservoir-caprock compositions, several traptypes, two petroleum migration paths and several poolformation models. Three petroleum systems E_1f_2-E_1f,K_2t_1+K_2c(!)
Based on review of the previous studies, the relationship between the peak hydrocarbon generation and expulsion of source rocks and evolution history of the tight reservoir rocks in tight sand gas reservoirs is studied dynamically and two types of tight sand gas reservoirs are identified: precedent deep basin gas and epigenetic tight gas.
The primary porosity is unimportant in medium-deep reservoir rocks, whereas the secondary pores occupy the main part. There are three secondary pore zones in medium-deep reservoir rocks, with the depth being from 3 200 to 3 500 m, from 3 600 to 4 000 m and from 4 200 to 4 500 m respectively.
Both the compositional maturity and structural maturity of Ⅱ 4-6 and Ⅳ 1-4 reservoir rocks in the north Part of Shuanghe oilfield are relatively low, and the types of authigenic and clay minerats are various, pete-structural diameters and the size of pore-throats varies distinctly, microscopic anisotropy. is high and micro-potes developed wed.
A change in effective stress due to fluid pressure was observed to be one of the key parameters influencing flow properties both downhole and in laboratory experiments on reservoir rocks.
The petro-elastical equations model the seismic properties of reservoir rocks saturated with CO2, methane, oil and brine.
Both the reservoir rocks and the flow channels forming the geothermal plumbing system are thought to vary from the Tertiary to the Quaternary provinces due to environmental conditions at the eruptive sites.
Various volcanological methods can be applied in the search for aquifers and geothermal reservoir rocks.
The subject of this paper is the treatment of rocks - and, especially, fluid-saturated and partially saturated reservoir rocks, as composite visco-elastic media.