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- W2560508816 abstract "Inversions of gravity data need an appropriate initial model in order to guide the process to produce a reasonable subsurface model. Downhole data from wells, such as lithology and density logs, are useful for constructing the initial model in order to constrain the inversion results. Second vertical derivatives (SVD) are also useful in giving additional information, especially to delineate the fault type and its orientation. Based on this information, an inversion domain consisting of a triangular mesh is constructed. The triangles inside the domain are tailored to the fault orientation and location. It is endeavored that this will increase the possibility of constructing an inversion geometry result that matches the geometry of the fault. These inversions, using conjugate gradient algorithms, have been tested to a synthetic model and showed an improvement in reconstructing the density structure distribution of the original model compared to a rectangular mesh. The triangular mesh inversion was applied to gravity data in the Hululais geothermal prospect. The residual map anomaly varies from -22 to 22 mGal in the prospect area as characterized by the existence of low gravity anomalies. It is estimated that the faults are mainly striking in the NW-SE and N-S directions. The density model with a triangular mesh inversion in the line perpendicular to the prospective area showed a subsurface density structure distribution with high-low-high density value associated with the depression structure of the Sumatra Fault. The plane of fault is estimated to have an 80 o dip. It provides pathways to the thermal manifestations at the surface." @default.
- W2560508816 created "2016-12-16" @default.
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- W2560508816 date "2015-01-01" @default.
- W2560508816 modified "2023-09-27" @default.
- W2560508816 title "The Application of a Triangular Mesh for Gravity Inversion to Reconstruct Subsurface Geological Structures in the Hululais Geothermal Prospect, Bengkulu" @default.
- W2560508816 hasPublicationYear "2015" @default.
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