Photomicrographs - North Coles Levee Field (9 photos)
Well: CLA 63-32
FRAME 3-33. Stevens sandstone from North Coles Levee ield ('CLA 63 32, 8708'). Note primary porosity and major secondary porosity after plagioclase (top center and left center), both infilled by blue epoxy. Field of view 2.lmm. Plane light.
FRAME 3-34. Stevens sandstone from North Coles Levee field (CLA 63-32, 8912'.). Note partially albitized plagioclase grain in center and top center margin. Albitic zones have higher birefringence. Field of view 2.lmm. Crossed Nicols.
FRAME 3-35. Stevens sandstone from North Coles Levee field (CLA 63-32, 8708'). Note secondary porosity within andesitic rock fragment (blue epoxy) filling most of the field of view. Field of view 2.lmm. Plane light.
FRAME 3-36. Stevens sandstone from North Coles Levee field (CLA 63-32, 8708'). Same field of view as frame 3-35. Note fine plagioclase laths within andesitic rock fragment. Field of view 2.lmm. Crossed Nicols.
FRAME 3-37. Stevens sandstone from North Coles Levee field (CLA 63-32, 8708'). Note two skeletal plagioclase grains (upper right and lower left) with secondary porosity infilled with blue epoxy. Note also brown clay coating detrital grains and rimming primary pores (e.g. upper left and lower right). Field of view 1.05mm. Plane light.
FRAME T-8A. Stevens sandstone from North Coles Levee field (CLA 63-32, 8642'). Note secondary intragranular porosity (represented by blue dyed epoxy) within plagioclase grain in center of photo. The sandstone also contains primary porosity which has been partially infilled by brown clay. Field of view 1.05mm. Plane light.
FRAME T-9A. Stevens sandstone from North Coles Levee field (CLA 63-32, 8642'). Note secondary porosity (blue epoxy) within skeletal plagiociase grains and green-brown clay partially infilling primary porosity. Field of view 1.05mm. Plane light.
FRAME T-IOA. Stevens sandstone from North Coles Levee field (CLA 63-32, 8642'). Note secondary porosity (blue epoxy) within partially dissolved plagioclase grain and green-brown clay partially infilling primary porosity, but not secondary porosity within feldspar. Field of view 1.05mm. Plane light.
FRAMES T-12A. Stevens sandstone from North Coles Levee field (CLA 63-32, 8642'). Note albitic fracture fills (white interference color) not in optical continuity with remainder of plagioclase grain (gray interference color). Field of view 1.05mm. Crossed Nicols.
