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ENG692 Petroleum Reservoir Simulation

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ENG692 Petroleum Reservoir Simulation

AcademicYear2019/20

ENG692–Petroleum Reservoir Simulation

Coursework

Instructions:                                             This is a practical coursework that aims to build a mechanistic simulation model using guidelines provided and preparing a 1000 words  report[JG1] to show your simulation results and model characteristics. A short-written essay is also requested to demonstrate student reflection on results obtained and answering some specific research questions.

Provided:                                         Instructions on both parts of the coursework, simulation practice and written report

Examiners:                                                           Richard Wheaton

University of Portsmouth 2019/20

ENG692Petroleum Reservoir Simulation by Pablo Salazar

Individual Coursework:Build a mechanistic simulation model using the data and constraints provided. Run your model and generate requested outputs to illustrate the geometry of your model and production forecasts using your chosen development plan.

The overall theme of this course work is practical reservoir simulation. The aim is to build a conceptual mechanistic model to simulate a theoretical development plan for a reservoir of given characteristics. Short term predictions will allow the student to discuss and reflect on the results obtained and to show the main features of their individual models.

The use of reservoir simulation is widely spread in the oil industry as a methodology to integrate multiple sources of data that allow characterising the reservoirs to understand their behaviour and predict future performance under different conditions given by alternative development scenarios and commercial constraints. Through this coursework the student will have the opportunity to have a “hands-on” experience building their own simulation model using a commercial software and using that model to make short term predictions for a specific development scenario.

You will explore the use of multiple keywords that will allow you to incorporate the data provided in your simulation model. At the same time, specific conditions and constraints will make your case unique. Once your model is built you will attempt running your model and troubleshoot any possible errors or issues in order to generate short term predictions for oil, gas, water production and injection.

You will deliver a copy of your simulation file (DATA file) and you will also prepare a document containing all your simulation results and a short investigation to answer 2 reservoir simulation related research questions. Your final document will be submitted via Moodle on the date and time specified for this coursework.

The model

Build a conceptual simulation model to represent a reservoir with an estimated area of 14 km2 (3500 m x 4000 m). The top of the reservoir is around (6100 ft) and the gross thickness of the entire reservoir section is approximately 100 meters.

Interpretation from well logs indicate that the reservoir quality varies from top to bottom with better rock properties towards the base of the reservoir section (fining upwards retrograding sequence). Rock properties at the top and base of the reservoirare shown in the following table:

Assume a constant variation of porosity, permeability and net to gross with depth in order to populate your simulation model.

The initial reservoir pressure is estimated to be 4000 psia @ 6200 feet. And the reservoir is undersaturated.Fluids and rock properties have been already incorporated and are provided in the text file attached that you can use as a template to build up your simulation model.

For producers use a minimum WHP of 100 psia and for injectors a maximum BHP of 4500 psia.

Assume that your producers are allowed to produce up to a maximum water cut of 95%

Additional information and guidelines to simulate the reservoir are provided individually to each student. A pool of 74 different scenarios will be used to randomly give each student a simulation case that is different to any other case, which make their projects unique and personal. See Table in the Appendix of this guide.

Writing your report

This coursework is an individual assignment and you have to produce a written document where you will describe your own simulation model, the methodology you followed to build the model and to populate the static and dynamic properties based on the data and information provided. As a guidance you are expected to explain:

1)      The geometry of your model (you can use images to support your description)

2)      Static and dynamic properties used in your simulation grid. Explain all your assumptions. How these properties describe your reservoir.

3)      Explain your selected development scenario. Number of producers and injectors defined in your model and the rationale behind your selected development.

In your document you will report the main outcomes and results generated with your simulation model, including:

1)      Fluids in place (Oil, Gas, Water)

2)      Initial Reservoir pressure profile

3)      Saturation distribution at initialisation. Specify where your fluid contacts are in your model.

4)      Short term predictions for oil, gas, water and water injection. At field level and well level.

5)      Short term prediction for reservoir pressure behaviour, at field level only.

6)      Any other results that you consider relevant to your own simulation case.

Remember that the use of figures and plots will help you to answer the questions above.

As part of this coursework you should also complete a Critical Review of Sources (CROS).This CROS is something like a literature review where you are expected to refer to at least 4 different academic sources, technical publication or articles from journals. All sources should be in English and referenced accordingly. You must include a final reference list (bibliography). For referencing guide visit http://www.referencing.port.ac.uk/apa5th/

You should aim to write 1000 words (3 Pages), excluding the reference list. Divide your work into paragraphs (see below) and pay attention to accuracy in grammar and vocabulary; if you are not sure of something, check it in a grammar book or dictionary. Your references should comply with APA 6th edition referencing style.

The purpose of your CROS is to find relevant technical information that allow you to answer the following research questions:

1)      To what extent the size of the grid cells will impact the simulation results?

2)      Is there any relationship between the geometry of the simulation grid and the spacing between wells in the model?

 

Your final submission should be in Moodle by 17/04/2020, consisting of two artefacts:

·        A “text” file which is your “.DATA” simulation file.

·        A “pdf” file containing your report. 

Work that is wholly plagiarized will receive a mark of zero.

The course work is worth 40% of the overall module assessment;15% of these marks are allocated to the simulation model, which should run without any errors or simulation problems, 15% of the marks will be allocated to the simulation results reported in the document, including your own discussion and reflection, and the remaining 10% will be allocated to your individual research and the quality of the answers provided to the research questions asked.

All work should conform to the submission guidelines in the Student Handbook. Yourreport should be word-processed and submitted in a PDF format via Moodle, using a 12-point font and 1.5 spacing[1]. You should include a title page with your student number, the name of your instructor, and of courseyour name as well as the title of your coursework.

Marking and feedback

The module team aim to achieve reliable, consistent and reproducible judgements on your work. In accordance with University regulations, each assessment is marked against a scheme that distinguishes between different levels of achievement.

 

You can expect the following feedback on assessments undertaken for this module.

 

·        A mark. Marks are normally expressed as a percentage.

·        The major shortcomings of your work.

·        Ways in which that mark can be improved.

 

You will also receive feedback during classes and through the Moodle site, and additional opportunities to receive feedback are available from the module team.

 

Your assessments are evaluated relative to the criteria outlined below. These provide a consistent reference point to distinguish between different levels of achievement. You should always take these criteria into consideration when preparing for any assessment on this module.



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