It is of great significance to delineate the features fluid migration and pore structure heterogeneity coal measure mudstone reveal its influencing factors for improving shale gas production recover. Based on response Low-field nuclear magnetic resonance under fully brine water saturated, centrifugal at 12000 rpm heating-treatment 80 °C, T2 capillary bound clay ranged from 0.57 0.987 ms 0.596–0...

Based on the drilling results of Taishen-1 well in Sanhu area Qaidam Basin, study proposed new findings conditions source rock, reservoir, and overlaying strata, as accumulation characteristics for biogenic gas. Further, controlling factors gas two favorable zones exploration were identified based comparison geological adjacent areas. The result showed that: (1) rock is lacustrine dark mudstone...

The deformation and failure of rock materials are closely related to the strain energy characteristics during loading process. These properties greatly affected when is subjected acidic solution. To study effects chemical solutions with different pH on mechanical mechanism mudstone, corrosion mudstone samples a uniaxial testing machine (CN64 electro-hydraulic servo). corrosive solution porosity...

In this paper, the adaptability characteristics of packer to three types common clastic rock reservoirs (mudstone, shale, sandstone) are analyzed systematically. Moreover, identification and structural design in hydraulic fracturing systematically conducted based on finite element calculation. Finally, nonlinear mathematical models packing safety factor pressure under conditions casing, mudston...

Mudstone subgrade may exhibit rather complicated deformation behavior under the coupling effect of unloading and wet swelling caused by excavation. To study mechanism mudstone subgrade, mudstones were sampled from NO.3 branch tunnel Badong section Zhengzhou-Wanzhou High-speed Railway a series wet-swelling tests carried out on them. We studied long-term excavation based creep test with condition...