Methodology for assessing the economic effect from the application of electric survey at the exploration stage of geological exploration

Abstract

One of the main geological uncertainties at the search stage is the morphology of the prospects, the presence and areal distribution of reservoir rocks and seals, and phase saturation of reservoir rocks.
Aim. The main goal of the work is to develop a methodology for the influence of electrical exploration on the chance of geological success (gCoS) in the design of geological exploration. The key objectives of the work are to test the developed methodology on the licensed areas of Gazprom-neft and implement the results of the calculation into the current decision tree of the project according to the developed methodology. The relevance of the work is to reduce geological risks and uncertainties at the search stage.
Materials and methods. An integrated approach using seismic and electrical surveys allows increasing the chance of geological success in geological exploration. To implement electrical exploration into the general decision tree, it is necessary to perform mathematical modeling. After performing the mathematical modeling a further decision is made on the feasibility of the economic evaluation of the project, taking into account electrical exploration. In this study, a case is presented that describes the impact of electrical exploration on the chance of geological success of PK (probability of having a reservoir).
Results. Based on the results of the work, a methodology for assessing the economic effect of the use of electrical exploration at the exploratory stage of geological exploration was developed and the chance of geological success (gCoS) was increased by introducing electrical exploration into the decision tree of the project.
Conclusion. The development of this direction is seen in the improvement of the scientific and methodological base for conducting modeling of electrical exploration work and testing the developed methodology for economic assessment on additional licensed areas of Gazprom-neft PJSC.