The invention discloses a tight
reservoir volume fracturing
compressibility evaluation method and belongs to the field of oil-gas
field development technology. According to the tight reservoir volumefracturing
compressibility evaluation method, the Young modulus,
shear modulus, tensile strength,
compressive strength, rock I-
type fracture toughness, rock II-
type fracture toughness and brittlenessindexes of each
point location in a target tight reservoir three-dimensional space obtained after normalization are substituted into different catastrophic models,
brittleness parameters, elasticity parameters and strength parameters are obtained through calculation, then the
brittleness parameters, the elasticity parameters and the strength parameters are utilized to construct a volume fracturingcompressibility evaluation model, a volume fracturing
compressibility coefficient of each
point location in the target tight reservoir three-dimensional space is obtained through calculation, and three-dimensional
spatial distribution of compressibility indexes of a target tight reservoir is acquired to determine compressible layer sections of the target tight reservoir. Therefore, quantitative evaluation of tight
reservoir volume fracturing compressibility is realized, and the problems that in the prior art, the subjectivity of weight determination is excessively high, and parameters are notconsidered comprehensively are solved.