Shale full-diameter rock core starting pressure testing method in radial flow flowing mode

The invention discloses a shale full-diameter rock core starting pressure testing method in a radial flow flowing mode. The shale full-diameter rock core starting pressure testing method comprises: 1)selecting a shale full-diameter rock core; 2) arranging a water injection pipeline at the center of the shale full-diameter rock core in a penetrating manner, wherein the water injection pipe is provided with an injection hole; 3) placing the shale full-diameter rock core and the water injection pipeline in a rock core clamper to form a radial flow experiment device, and calculating the pore volume of the shale full-diameter rock core, wherein the side wall of the rock core clamper is provided with an opening; 4) displacing the simulated formation water in the shale full-diameter rock core byusing simulated oil until achieving an irreducible water saturation degree to obtain the starting pressure of the shale full-diameter rock core under the irreducible water saturation degree; 5) simultaneously injecting simula