成都理工大学学报（自然科学版）2018，Vol.45Issue(1)：121-128,8.DOI:10.3969/j.issn.1671-9727.2018.01.10
川东南地区海相页岩气层TOC含量多参数融合预测
A comprehensive prediction of multiple parameters of TOC in marine gas shale, southeastern Sichuan Basin, China
摘要
Abstract
In the study of shale oil and gas reservoirs,the total organic carbon content (TOC) is one of the important indexes to evaluate the hydrocarbon generation capability.Based on the TOC values and seismic sensitive parameters from a certain drilling well in southeastern Sichuan Basin,the parameters of high correlation are obtained with the seismic susceptibility parameters related to physical and gas bearing characteristics by intersection analysis,including density,natural gamma,shear modulus,Young's modulus.Linear curve fitting method is used for density and natural gamma parameters,and the exponential curve fitting method is adopted for the shear modulus and Young's modulus parameters.Then,four fitting formulas for the relevant parameters are obtained.Subsequently,the quadratic fitting for the four fitted parametric equations is used to build the comprehensive prediction formula.Hence,a bridge crossing over seismic sensitive parameters and TOC is established.Based on the density,Young's modulus and shear modulus parameters acquired by inversion of the pre-stack elasticity parameters,the natural gamma ray can be calculated directly by the extended pre-stack elastic impedance inversion.With pre-stack data,the inversion accuracy increased significantly.Finally,the prediction results of the TOC content in the region are deduced by fitting the formula and it shows that the correlation between the predicted results and the measured TOC content reaches 0.95 at the location of proven drilling well.In addition,the overall distribution satisfies the geological regulation of the Sichuan Basin.The method demonstrates its feasibility and generalizability.关键词
页岩气/川东南地区/TOC含量/敏感参数/数学拟合/叠前反演Key words
shale gas/Sichuan Basin/TOC/seismic sensitive parameters/fitting formulas/pre-stack inversion分类
天文与地球科学引用本文复制引用
蒋旭东,曹俊兴,逯宇佳,何沂,蔡紫薇..川东南地区海相页岩气层TOC含量多参数融合预测[J].成都理工大学学报（自然科学版）,2018,45(1):121-128,8.基金项目
国家自然科学基金项目(41430323). （41430323）
