Hem Bahadur Motra

PhD, Bauhaus_universität Weimar, 2015

MS.C, University of Hannover, 2011

Research and Teaching (since 2014)

Fracture Development and Characterization from Field Data in a Dolomite-Limestone Sequence: Fracture Development and Characterization from Field Data (Link to publication)

Implications of Fracture Networks in Elastic Response of Heterogeneous Carbonate Reservoirs (Link to publication)

Influence of lithological contrast on elastic anisotropy of shales under true-triaxial stress and thermal conditions (Link to publication)

GRK 1462: Bewertung gekoppelter experimenteller und numerischer Partialmodelle im konstruktiven Ingenieurbau (Link to project)

DESCRAMBLE has developed novel drilling technologies for a proof-of-concept test of reaching deep geothermal supercritical resources. It has drilled and tested the continental-crust condition for demonstrating novel drilling techniques, the control of gas emissions and high temperature/pressure conditions expected from the deep fluids. DESCRAMBLE has also improved knowledge of deep chemical-physical conditions for predicting and controlling future drilling conditions. The test site has been an existing dry well in Larderello, Italy, already drilled to a depth of 2.2 km and temperature of 350 °C, which was deepened to 2.9 km depth reaching supercritical conditions. The productivity and efficiency of the project were ensured by the combination of industrial and research participation and by the recognized expertise of the consortium in geothermal R&D as well as oil and gas drilling, combining excellence in both sectors is meant to drill in continental-crust, super-critical geothermal reservoir, to test and demonstrate novel drilling techniques to control gas emissions, the aggressive environment and the high temperature/pressure expected from deep fluids and to characterize the chemical and thermo-physical condition. (Link to project)

Seismological observations indicate that large regions within Earth show directionally dependent seismic wave speeds. Such seismic anisotropy is a unique and invaluable indicator for material transport, structure and rheology of the Earth. However, a challenge in using seismic anisotropy is that it arises from different sources, leading to non-unique interpretations of its origin. Intrinsic anisotropy originates from single crystals, or aggregates of oriented crystals, which is known as crystallographic preferred orientation (CPO). It is an important source for anisotropy, generally related to flow of material in the deeper parts of the crust, mantle and core. Extrinsic, or apparent, anisotropy arises from geometrical effects such as layering of rocks, and oriented crack and fluid networks. In this project, particular focus is placed on testing the hypothesis that mineral compositional banding is an important extrinsic contributor to seismic anisotropy. Field work will be conducted to map and collect representative layered rocks for a wide range of rock types, and analyses include detailed microstructural and CPO determination. Seismic velocities and (Link to project)

o Technical Committee, American Rock Mechanics Association (section: Hydraulic Fracturing, Tunneling, Underground Storage and Utilization and Induced Seismicity)

Technical Committee, International Society for Soil Mechanics and Geotechnical Engineering, Laboratory Stress- Strain Strength Testing of Geomaterials

German Society for Geotechnics (DGGT), Soil and Foundation Engineering, Rock Mechanics, Engineering Geology