Application of Fullbore Formation MicroImager (FMI) to Study of Glutenite Sedimentary Structures in Jiyang Depression

Taking steep slope region of Jiyang depression as an example,the FMI logs of glutenite are analyzed,setting up the core vs. image relationship,based on which,the glutenite sedimentary structures and paleocurrent directions could be identified. The FMI map's colors and features are helpful to identification of the sedimentary structures by the fact that different kinds of beddings such as horizontal and parallel bedding,planar,trough and wavy cross bedding,graded bedding and massive bedding can be discerned on the images by fine changes of color within a stratum and dip azimuth between lamina surfaces picked up on them. Penecontemporaneous deformation structures such as load structure,sand ball or pillow and deformed bedding are easily recognized by similar characteristics on images from outcrops or cores. The paleocurrent direction can be deduced by dip direction of cross laminae of glutenite interpreted on images.