«Oilfield engineering»

Methodology of comparing reservoir proxy modelling instruments for oil and gas condensate field in conditions of import substitution

UDC: 681.518:622.276:532.5
DOI: -

Authors:

¹ NS Digital, Perm, Russia
² Gazpromneft-Yamal, Tyumen, Russia
³ ITS, St. Petersburg, Russia
⁴ TumD of ITAM SB RAS, Tyumen, Russia

Keywords: methodology for comparing modeling instruments, oil and gas reservoir filtration model, proxy modeling, pseudo-three-phase model, material balance model, integrated asset model, well testing, bottomhole and reservoir pressure assessment, oil and gas condensate field

Annotation:

This article presents the developed methodology and the results of selecting a proxy modeling instrument for one of oil and gas condensate fields considering the application within the framework of integrated asset modeling (IAM) and the ongoing process of import substitution. The article presents the following results within the framework of a pilot oil and gas condensate productive formation:

1. Various methods and instruments of proxy reservoir modeling for predicting reservoir and bottomhole pressure, water cut and GOR (gas-oil factor):

– the previously developed method for constructing material balance models (zero-dimensional model) was used and tested;

– the new method of proxy modeling of three-phase flow processes in porous media was developed and tested based on the two-dimensional pseudo-three-phase model and the automated history matching method developed for it (recommended for use based on the testing results);

– the method for constructing a three-dimensional proxy model based on a full-scale geological and reservoir models was developed and tested.

2. Technologies for integrating proxy models into the IAM: the analysis of various integration options was carried out and the prototype technology for integrating the above-mentioned two-dimensional proxy model of a reservoir within the IAM was developed.

3. Verification of measurements and survey data of wells:

– the set of methods for data verification (reservoir and bottomhole pressure, water cut and GOR) was developed and tested for proxy models and with the help of proxy models;

– the approach was developed and results were obtained for estimating the maximum error for real data of reservoir pressure for the pilot productive formation.

4. The set of methods for a formalized comparison of modeling instruments was developed and tested based on the pilot productive formation and the set of several different instruments:

– the selection of an optimal pilot productive formation for testing based on the developed rating system (features of the pilot productive formation: gas cap and developed oil rim, complex system of tectonic disturbances, multilateral wells, active and changing system for maintaining reservoir pressure, presence of gas breakthroughs, etc.);

– the functional comparison of instruments based on the developed rating system;

– the comprehensive assessment of the optimal instrument considering the following factors: the result of calculations and physical adequacy of obtained results (choice of the history matching period and exam period), labor costs for creating and maintaining models;

– the results of solving test forecast problems.

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