This paper addresses challenges in characterizing unconventional shale reservoirs. For the first time, the nuclear magnetic resonance (NMR) and dielectric responses are integrated to characterize intact, saturated, and kerogen-rich subsurface shale samples at various maturation stages. The NMR and dielectric were measured separately using independent pieces of equipment, and all NMR and dielectric measurements were carried out at surface conditions. A comprehensive assessment is provided to address the changes induced by maturation through combined geochemical and petrophysical analyses. Shale samples from the Upper Cretaceous sequence of Jordan were characterized using Rock-Eval analysis, before and after maturation treatments. The total organic carbon (TOC) was decreased from 17.4 to 13.8 and 11.3 wt% and the pyrolyzed sulfur content was decreased from 3.32 to 0.25 and 0.15 3.18%, after maturing the samples at 250 °C for 1 and 5 days, respectively. The study employed NMR to track changes in pore structure via relaxation time and measured dielectric properties and conductivity dispersion across frequencies from 10 MHz to 1 GHz using a wideband open-ended coaxial probe. After the maturation treatments, the dielectric constant of saturated shale samples doubled, and the conductivity increased by over three times. These changes in dielectric properties can be attributed to increased fluid-rock interfacial polarization and the formation of new pore spaces during maturation. NMR findings also indicated the emergence of a new pore system within the organic matter and the development of new fractures, resulting in a 6 to 12% increase in total porosity. The results obtained indicate that maturation-induced microstructural changes have a more significant influence on the dielectric responses than alterations on total organic carbon.

中文翻译：

---

通过集成介电和核磁共振测量来评估人工成熟对非常规页岩地层的岩石物理和地球化学性质的影响

本文解决了表征非常规页岩油藏的挑战。首次将核磁共振 (NMR) 和介电响应相结合，以表征不同成熟阶段的完整、饱和和富含干酪根的地下页岩样品。使用独立的设备分别测量 NMR 和介电常数，并且所有 NMR 和介电常数测量均在表面条件下进行。通过地球化学和岩石物理综合分析，提供全面的评估来解决成熟引起的变化。使用岩石评估分析对熟化处理前后来自约旦上白垩统层序的页岩样品进行了表征。样品在250℃熟化1天和5天后，总有机碳（TOC）从17.4％下降到13.8％和11.3％，热解硫含量从3.32％下降到0.25％和0.15％和3.18％。该研究采用 NMR 通过弛豫时间跟踪孔隙结构的变化，并使用宽带开放式同轴探头测量 10 MHz 至 1 GHz 频率范围内的介电性能和电导率色散。经过熟化处理后，饱和页岩样品的介电常数增加了一倍，电导率增加了三倍以上。这些介电特性的变化可归因于流体-岩石界面极化的增加和成熟过程中新孔隙空间的形成。核磁共振结果还表明，有机质内出现了新的孔隙系统，并形成了新的裂缝，导致总孔隙度增加了 6% 至 12%。获得的结果表明，成熟引起的微观结构变化对介电响应的影响比对总有机碳的变化更显着。