Scanning electron microscopy (SEM) is one of the most prevalent methods used to image and quantify pore size distribution shale rock, critical in understanding unconventional petroleum systems production. Generally, digital greyscale SEM images are currently processed for quantification either by a manual drawing method, threshold automatic edge detection or watershed methods, all which have so...

To investigate the influence of flowback time and difference on behavior shale fracturing fluid, we carried out permeability test experiment Longmaxi Formation under different pressure gradients analyzed retention characteristics water phase in pores fractures after by nuclear magnetic resonance (NMR) instrument. The results indicate that gradient ranges 0.06~0.18 MPa/cm, content retained sampl...

Shale gas storage and permeability space is between nanometers micrometers has strong multiscale characteristics, resulting in highly complicated shale flow. Therefore, the development of needs to clarify seepage mechanism establish a flow model equation that can analyze In this paper, based on single nanotube model, combined with Weiyuan-Changning demonstration zone target layer Longmaxi forma...

In order to find out the enrichment mechanism and forming type of deep shale gas, taking Longmaxi Formation in Desheng–Yunjin Syncline area Sichuan Basin as an example, we determined mineralogy, organic geochemistry, physical property analysis, gas water content, influence three factors, namely sedimentation, structural conditions, hydrogeological on gas. The results show that is a good hydroca...

Abstract In this paper, the pore structure characteristics of shales and its controlling factors were analyzed by means total organic carbon (TOC) analysis, X-ray diffraction (XRD) field emission scanning electron microscopy (FE-SEM) low-pressure N 2 adsorption (LPNA) analysis. Based on grey relational parameters discussed. The results showed that TOC contents range from 2.98 to 4.97%, main min...