The key geological parameters controlling the enrichment and productivity of shale oil and gas (O&G) are studied systematically using 991 shale core analyses, and assay data from 72 systematic coring wells and 1317 rigs from the lower section of the Eagle Ford Formation in the Gulf Coast Basin of the United States. The key parameters include both source and derived parameters. Source parameters are controlled mainly by the paleo-sedimentary environment, whereas derived parameters combine source parameters, thermal evolution, and tectonic evolution. Here we examine the evolution of, and relationships among, the source and derived parameters with respect to thermal and tectonic evolution. Derived parameters for shale, including total porosity (φ_t) and matrix permeability (K_e), are related to the source parameters of kerogen type, total organic carbon (TOC), clay volume content (V_clay), and effective shale thickness (He_shale), and can be represented by the source parameters and vitrinite reflectance (R_o), which directly reflects the thermal evolution of shale O&G. Shale O&G-derived parameters, including oil (S_o), gas (S_g), and water (S_w) saturation, are related to R_o, V_clay, and TOC, and can be represented by the source parameters and R_o. Shale O&G-derived parameters that control the “sweet spots” and enrichment of shale O&G include oil density (ρ_o), gas relative density (ρ_g), gas–oil ratio (GOR), water–gas ratio (WGS), oil volume coefficient (Boi), and gas compression factor (Z), and can be represented by R_o. Under the same conditions as the roof and floor in the effective shale layers, the formation pressure gradient (P_index) can be represented by R_o, and shale compressibility can be represented by V_clay. Five parameters [TOC, V_clay, He_shale (effective shale thickness), R_o, and P_index], combined with microfractures and sealing conditions, are the key parameters for assessing the enrichment, productivity, and “sweet spots” of shale O&G.

使用 991 个页岩岩心分析和来自墨西哥湾沿岸 Eagle Ford 组下部的 72 口系统取芯井和 1317 台钻机的分析数据，系统地研究了控制页岩油气 (O&G) 富集和产能的关键地质参数美国盆地。关键参数包括源参数和派生参数。源参数主要受古沉积环境控制，而衍生参数则结合了源参数、热演化和构造演化。在这里，我们研究了与热和构造演化有关的源参数和派生参数的演化和它们之间的关系。页岩的导出参数，包括总孔隙度 ( φ _t ) 和基质渗透率 ( K_e )，与干酪根类型、总有机碳( TOC )、粘土体积含量( V_粘土)、有效页岩厚度( He_页岩)等源参数有关，可用源参数和镜质体反射率( R)表示_o )，直接反映页岩油气的热演化。页岩 O&G 衍生参数，包括油 ( S _o )、气 ( S _g ) 和水 ( S _w ) 饱和度，与R _o、 V_粘土和TOC 相关，可以用源参数和ř _Ò。控制页岩油气“甜点”和富集的页岩油气衍生参数包括油密度 ( ρ _o )、气体相对密度 ( ρ _g )、气油比 ( GOR )、水气比 ( WGS )、油体积系数（博伊），和气体压缩因子（ž），并且可以表示为[R _Ò。在与有效页岩层顶底板相同的条件下，地层压力梯度（P_指数）可以用R _o表示，页岩压缩性可以用V_粘土表示. 五个参数[ TOC、V_粘土、He_页岩（有效页岩厚度）、R _o和P_指数]，结合微裂缝和封闭条件，是评估页岩油气富集、产能和“甜点”的关键参数.