Constructing the Apparent Geological Model by Fusing Surface Resistivity Survey and Borehole Records

Jui Pin Tsai, Ping Yu Chang, Tian-Chyi J Yeh, Liang Cheng Chang, Chin Tsai Hsiao

Research output: Contribution to journalArticle

Abstract

We constructed an apparent geological model with resistivity data from surface resistivity surveys. We developed a data fusion approach by integrating dense electrical resistivity measurements collected with Schlumberger arrays and wellbore logs. This approach includes an optimization algorithm and a geostatistic interpolation method. We first generated an apparent formation factor model from the surface resistivity measurements and groundwater resistivity records with an inverse distance method. We then converted the model into a geology model with the optimized judgment criteria from the algorithms relating the apparent formation factors to the borehole geology. We also employed a non-parametric bootstrap method to analyze the uncertainty of the predicted sediment types, and the predictive uncertainties of clay, gravel, and sand were less than 5%. Overall, our model is capable of capturing the spatial features of the sediment types. More importantly, this approach can be arranged in a self-updated sequence to enable adjustments to the model to accommodate newly collected core records or geophysical data. This approach yields a more detailed apparent geological model for use in future groundwater simulations, which is of benefit to multi-discipline studies.

Original languageEnglish (US)
JournalGroundWater
DOIs
StateAccepted/In press - Jan 1 2019

Fingerprint

Boreholes
electrical resistivity
borehole
Geology
Groundwater
Sediments
geology
bootstrapping
groundwater
geostatistics
Data fusion
Gravel
sand and gravel
sediment
interpolation
Interpolation
Clay
Sand
clay
simulation

ASJC Scopus subject areas

  • Water Science and Technology
  • Computers in Earth Sciences

Cite this

Constructing the Apparent Geological Model by Fusing Surface Resistivity Survey and Borehole Records. / Tsai, Jui Pin; Chang, Ping Yu; Yeh, Tian-Chyi J; Chang, Liang Cheng; Hsiao, Chin Tsai.

In: GroundWater, 01.01.2019.

Research output: Contribution to journalArticle

Tsai, Jui Pin ; Chang, Ping Yu ; Yeh, Tian-Chyi J ; Chang, Liang Cheng ; Hsiao, Chin Tsai. / Constructing the Apparent Geological Model by Fusing Surface Resistivity Survey and Borehole Records. In: GroundWater. 2019.
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