tailieunhanh - Reservoir Formation Damage Episode 1 Part 6

Tham khảo tài liệu 'reservoir formation damage episode 1 part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Characterization of Reservoir Rock 107 X-Ray Diffraction XRD The X-ray powder diffraction analysis XRD is a nondestructive technique that can provide a rapid and accurate mineralogical analysis of less than 4 micron size bulk and clay contents of sedimentary rock samples Amaefule et al. 1988 . This is accomplished by separately analyzing the clays and the sand silt constituents of the rock samples Kersey 1986 . The X-ray diffraction technique is not particularly sensitive for noncrystalline materials such as amorphous silicates and therefore an integrated application of various techniques such as polarized light microscopy X-ray diffraction and SEM-EDS analyses are required Braun and Boles 1992 . Hayatdavoudi 1999 shows the typical X-ray diffraction patterns of the bulk and the smaller than 4 micron size clay fractions present in a core sample. X-Ray CT Scanning XRCT X-Ray CT computer-assisted tomography scanning is a nondestructive technique which provides a detailed two- and three-dimensional examination of unconsolidated and consolidated core samples during the flow of fluids such as drilling muds through core plugs and determines such data like the atomic number porosity bulk density and fluid saturations Amaefule et al. 1988 Unalmiser and Funk 1998 . This technique has been adapted from the field of medical radiology Wellington and Vinegar 1987 . As depicted by Hicks Jr. 1996 either an X-ray source is rotated around a stationary core sample or the core sample is rotated while the X-ray source is kept stationary. The intensity of the X-rays passing through the sample is measured at various angles across different cross sections of the core and used to reconstruct the special features of the porous material. The operating principle is Beer s law which relates the intensity of the X-ray through the linear attenuation coefficient to the physical properties of materials and different fluid phases in the sample Wellington and Vinegar 1987 Hicks Jr. 1996 . A .