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

Claim 4:
5. 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 according to the evaluation index, combined with the meter fluid extraction index, the reservoir classification boundary value of the reservoir geological classification evaluation index is obtained.