Patent ID: 11927094
Assignee: SOUTHWEST PETROLEUM UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC E  G | IPC E  G

Claim 0:
1. A comprehensive geological-engineering classification evaluation method for low-permeability reservoirs, comprising steps of:
constructing geological classification evaluation indexes of a reservoir: adopting gray correlation method to obtain main controlling factors of reservoir geology of the low-permeability reservoirs that affects fracturing effects; based on the main controlling factors of the reservoir geology, constructing the geological classification evaluation indexes of low-permeability reservoirs by principal component analysis;
constructing engineering classification evaluation indexes of the reservoir: adopting gray correlation method to obtain main controlling factors of geomechanics of the low-permeability reservoirs that affects fracturing effects; based on the main controlling factors of geomechanics, constructing the engineering classification evaluation indexes of low-permeability reservoirs by an analytic hierarchy process; and
according to classification limit values of the geological classification evaluation indexes of a reservoir and engineering classification evaluation indexes of a reservoir, achieving comprehensive geological-engineering classification of reservoir types;
wherein the step of constructing geological classification evaluation indexes of a reservoir comprising:
S1: by the grey correlation analysis method, calculating a correlation degree between reservoir geological factors and rice production index to obtain the main controlling factors of the reservoir geology
S2: by the principal component analysis, constructing the geological classification evaluation indicators of low-permeability reservoirs.