The invention discloses a three-dimensional geologic body model construction method based on sedimentary
simulation, and the method comprises the following steps: S1, data collection: collecting various geological data of a target region, including but not limited to drilling data,
seismic exploration data, a geological map, paleocurrent direction data and the like; the collected data are preprocessed, the
data quality is checked, and wrong or abnormal data are removed; s2,
feature parameter extraction: extracting feature parameters related to sedimentary
facies from the preprocessed
geological exploration data; the parameters can comprise a particle size median Md, a sorting coefficient SO, skewness SK, kurtosis Kg, a
logging curve characteristic value, natural gamma GR and resistivity Rt; and S3, parameter mapping of the sedimentary
facies. According to the preparation method, through parameter mapping and fine identification of sedimentary
facies, the sedimentary characteristics of the geologic body are reflected more accurately, and the calculation amount is reduced and the modeling efficiency is improved while the precision of the model is ensured by the application of a self-adaptive grid division technology and a finite volume method.