Igneous rock reservoirs are characterized by their extensive distribution

long geologic time and no exclusiveness of rock types. The primary pores

such as intercrystal pores and shrinkage pores

formed while igneous rocks cool down are not influenced by compaction. These characteristics

being different with that of sedimentary reservoirs

are very favorable for seeking deep oil and gas accumulations. In view of the problems concerning the characteristics

formation and evolution mechanism

time space distribution and prediction of igneous rock reservoirs

it is proposed that igneous petrology

volcanic geology

thermodynamics

physical properties of magma and hydrodynamics

as well as geophysics should be strengthened in study of igneous rock reservoirs.