| Abstract Submission No. | ABS-2.4-0080 |
| Title of Abstract | Subsurface Complexity Analysis of the New River Geothermal Reservoir, California, Using Magnetotelluric Dimensionality Parameters |
| Authors | Bapi Barman*, Prof. Ujjal Kumar Borah |
| Organisation | Indian Institute of Technology (ISM) Dhanbad |
| Address | IIT ISM Dhanbad, 826004, Jharkhand, India Dhanbad, Jharkhand, India Pincode: 826004 E-mail: 23mc0021@iitism.ac.in |
| Country | India |
| Presentation | Poster |
| Abstract | Characterizing the structural complexity of the New River Geothermal Reservoir in California is critical for resource exploration, as fluid migration is controlled by deep-seated faults and heterogeneous resistivity contrasts within a tectonically active rift system. Magnetotelluric (MT) dimensionality analysis provides a robust framework for delineating these subsurface features prior to computationally intensive MT inversion. This study utilizes a multi-parameter approach integrating Swift and Bahr skew, phase-tensor (PT) attributes, and WAL rotational invariants to systematically evaluate the reservoir's geoelectrical dimensionality. The results indicate that near the surface the rock layers are simple and form a one-dimensional structure for measurement periods between 0.002 s and 10 s. Deeper down the structure becomes more complex and is two-dimensional for periods from 10 s to about 1400 s. By assessing the system's dimensionality, this approach establishes a distinct, empirical basis for choosing the best inversion strategy, leading to a precise and geologically-sound representation of the geothermal reservoir. |
| Keywords | Magnetotelluric, Swift and Bahr skew, phase-tensor (PT) attributes, WAL rotational invariants |