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Proposal_PP321_2020_ProjectD1

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Research Group in Reservoir 
Simulation and Management 
 
 
 
 
 
 
 
 
 
 
PP321 
Project D1: Study Case for Oil Field 
Exploitation Strategy Selection 
 
 
Ana Teresa Gaspar 
Denis Schiozer 
 
 
 
 
Campinas, October 20, 2020 
 
Study Case for Oil Field Exploitation Strategy Selection 
Document: Proposal_PP321_2020_ProjectD1. – Date: 10/20/2020 
 Page 2 /5 
UNISIM-CEPETRO-UNICAMP 
 
Summary 
1. INTRODUCTION ..................................................................................................................................... 3 
1.1 UNISIM-I-D ........................................................................................................................................ 3 
2. ACTIVITY A ............................................................................................................................................. 4 
2.1 OBJECTIVE AND STEPS.......................................................................................................................... 4 
2.1.1 Diagnosis ..................................................................................................................................... 4 
2.1.2 Global history matching .............................................................................................................. 4 
2.1.3 Local history matching ................................................................................................................ 4 
3. ACTIVITY B ............................................................................................................................................. 4 
3.1 DETERMINISTIC APPROACH .................................................................................................................. 4 
3.2 SOFTWARE ........................................................................................................................................... 4 
4. REPORTS AND PRESENTATION ........................................................................................................ 4 
5. REFERENCES .......................................................................................................................................... 5 
 
 
 
 
 
Study Case for Oil Field Exploitation Strategy Selection 
Document: Proposal_PP321_2020_ProjectD1. – Date: 10/20/2020 
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UNISIM-CEPETRO-UNICAMP 
1. Introduction 
This document presents a project proposal for the course “PP321 – Simulação Numérica de 
Reservatórios”. 
A reservoir study case is presented to be submitted to decision analysis regarding reservoir 
development, UNISIM-I-D. The case presents a simulation model created for tD (1461 days), the initial 
stage of field development, with a total of 4 vertical producers. A history production for 1461 days is 
provided. 
This project is divided into two activities using the deterministic case: 
1) Activity A: production history matching; 
2) Activity B: exploitation strategy optimization. 
The documentation with information for the development of the simulation model as the model data 
are available for download. The data set include: 
• UNISIM-I-D reservoir simulation model in IMEX-CMG format; 
• 4 vertical production wells; 
• 1461 days of production data for each well up to 05/31/2017; 
• a set of reservoir attributes; 
• economic scenario; 
• assumptions and the proposal description available at UNISIM-I webpage: 
http://www.unisim.cepetro.unicamp.br/unisim-i/. 
The assumptions, operating conditions, mandatory dates and objective-functions, available in the 
proposal should be followed. 
1.1 UNISIM-I-D 
The UNISIM-I-D simulation model (the same name of the benchmark case consists of approximately 
37,000 active grid blocks and contains 4 years of production history. Figure 1 shows the modeled 
porosity outline with the four initial vertical wells. 
 
Figure 1 – UNISIM-I-D: Porosity map (intermediate layer) with 4 vertical wells 
 
 
http://www.unisim.cepetro.unicamp.br/unisim-i/
Study Case for Oil Field Exploitation Strategy Selection 
Document: Proposal_PP321_2020_ProjectD1. – Date: 10/20/2020 
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UNISIM-CEPETRO-UNICAMP 
2. Activity A 
In Activity A, a history matching until 1461 days (~ 4 years) must be performed. The model contains 
4 vertical producers. 
2.1 Objective and steps 
The objective of this activity is to perform a manual and deterministic history matching process taking 
into account the following steps: 
2.1.1 Diagnosis 
Compare the results from the simulation model provided with the history data through the analysis of 
the field average pressure and oil, water and gas flow rates and bottom hole pressure per well. 
2.1.2 Global history matching 
Alter the properties with global influence (for example, relative permeability, water oil contact etc.) 
and verify the well and field matching. 
2.1.3 Local history matching 
After the global history matching, perform a new diagnosis focusing on the well behavior. Alter the 
properties with local influence and verify the history matching of the wells (fluid rates and bottom hole 
pressure). 
3. Activity B 
The objective of this activity is to optimize the design and control variables of the provided exploitation 
strategy between t1 (after 1461 days of history production) and the maximum final time tF. This project 
considers the development phase, where design and control variables should be optimized. The 
economic scenario can be seen in UNISIM-I-D proposal. 
3.1 Deterministic approach 
This activity consists of performing a manual and deterministic optimization process to set up an 
exploitation strategy for the field development plan for the 26 years of production forecasting aiming 
to maximize the Net Present Value (NPV). 
Details regarding decision variables, mandatory dates and assumptions are presented in UNISIM-I-
D.pdf (Section 2). 
3.2 Software 
IMEX 2020.10 is the reservoir simulator of this project. MERO 2020.4.0 can be used to obtain 
production and economic indicators (e.g., tool FOP). The reservoir simulation runs can be launched 
from MERO. 
4. Reports and Presentation 
An examining board will evaluate the project. The evaluation is divided into two parts: 
• Oral presentation: 
o The presentation should contain a brief theory contextualization and focus essentially on 
the methodology employed and, on the results, achieved in the practical applications 
developed. 
Study Case for Oil Field Exploitation Strategy Selection 
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UNISIM-CEPETRO-UNICAMP 
o The presentation should be made in 20 minutes at maximum. Ten minutes will be 
reserved for the questions of the members of the examining board. 
o Presentation date: January 5 and 12, 2021. 
• Report: 
o The report should provide a robust theory investigation of the focus, highlighting the main 
findings. Each procedure adopted must be justified and described and every result 
presented in graphs and/or tables must be analyzed and discussed in a direct and 
concise way. A conclusion about the project developed must be exposed. 
o The report should contain at maximum 8 pages (Including the references). 
o Submission deadline: January 12, 2021. 
5. References 
Gaspar, A.T.F.S, Barreto, C.E.A.G, Schiozer, D.J., 2016. Assisted Process for Design Optimization 
of Oil Exploitation Strategy. Journal of Petroleum Science and Engineering, 146, 473-488. 
Gaspar, A.T.F.S., Avansi, G.D., Santos, A.A.S., Hohendorff Filho, J.C., Schiozer, D.J., 2015. UNISIM-
I-D: Benchmark Studies for Oil Field Development and Production Strategy Selection. 
International Journal of Modeling and Simulation for the Petroleum Industry, 9(1), 47-55. 
Available at: https://www.unisim.cepetro.unicamp.br/en/component/publicacoes/ 
Gaspar, A.T.F.S, Santos, A.A., Maschio, C., Avansi, G.D., Von Hohendorff, J.C.F., Schiozer, D.J.,