Abstract:

According to the 369 core mercury—injection data from 9 wells，this paper studies the throat types and pore structure parameters of the main flowing throats of Triassic reservoir，such as the average. throat radius(Rz )，throat deriation coefficient(α)，throat pore structure coefficient(F), and derives an analytic expression of the interrelated pore structure parameters and the physical properties of the reservoir. This paper also introduces the throat distribution under stratum stress first obtained through the horizontal one—way flowing mercury—injection test under effective stress.

Key words: Reservoir characteristics, Pore structure, Effective stress, Structure coefficient, Mercury—injection, Throat radius, The Triassic Period