RESEARCH OF THE RESERVOIR PHYSICS PROPERTIES CHARACTERISTICS OF THE VOLCANIC ROCKS OF RHYOLITE TYPE

The volcanic rocks reservoir has special types and complex pore structure. Reservoir physics properties will affect the produced degree of crude oil (gas) during development. The material of rhyolite core sample and well-logging of Shengshen 2-1 well is used in rhyolite volcanic rocks gas field. Through the experimental study of petrophysical parameter varied with net overburden pressure. The experimental result is treated and analyzed ,some beneficial conclusion is obtained : Both that of the porosity of rhyolite volcanic rocks reservoir came along net overburden pressure submit polynomial(trinomial)function change relation; Both that of permeability of rhyolite volcanic rocks reservoir changed along with net overburden pressure satisfy power exponent relation; reservoir rock compressibility coefficient and net overburden pressure of compartment relation satisfied exponential relation type; rock densities and porosity contents corking linear relationship. The physical property characteristic of rhyolite volcanic rocks reservoir farther known knows clearly. This favorable base data is supplied for determining rational exploitation scheme of volcanic rocks gas reservoir.