Seismic tomography is a non-linear problem with a significant null-space. Our estimation problem often converges slowly, to a geologically unreasonable model, or not at all. One reason for slow or non-convergence is that we are attempting to simultaneously estimate reflector position (mapping velocity) and image our data (focusiing velocity). By performing tomography in vertical travel-time spa...

I realize and analyze a model-based joint tomography scheme in this paper. Surface reflection seismic data and VSP traveltimes are used simultaneously to invert the velocity by using an integrated inversion scheme. Since more data are used, the integrated tomography can obtain more accurate inversion results with lower uncertainty. Using identity operator as integration operator, I apply this m...

Purpose. The work studies Sinjar formation (upper Paleocene lower Eocene) within the Bazyan anticline in Sulaimaniyah region (northeastern Iraq). facies analysis is based on petrographic study of limestone deposits and essential to identify their nature. sediments that formed have a high content skeletal granules which include small amount red algae residues unicellular organisms-foraminifera. ...

The theory of coalbed methane distribution controlled by tectonism is a hot issue in the field geofluid-geotectonic interaction research. Taking geological structure scale range 1302 working face Guojiahe wellfield Yonglong mining area as background, this paper focuses on basic research problem influence control coal reservoir gas content and uses THM coupling model to analyze change characteri...

This work documents for the first time prehistoric, but morphologically pristine, Emad Deh rock avalanche of Zagros Mountains. The ca. 420 Mm 3 was initiated as a rockslide on dip slope affecting weak unit marls with interbedded limestones overlain by thick and competent limestone formation. is located northern limb growing Gavbast Anticline at edge inflating Dome, related to buried salt diapir...