This document discusses reservoir evaluation techniques. It begins by defining reservoir evaluation as utilizing geological, geophysical, and engineering methods to understand downhole formation properties for better decision making. Key goals are estimating hydrocarbon volumes, assessing recoverable reserves, and prioritizing development. Important parameters in formation evaluation are identified as fluid composition, water saturation, size, volume, permeability, and porosity. The document also outlines technical challenges, the role of wireline logs, and the importance of reservoir evaluation for productivity and economic impact.

1.
NEAR EAST UNIVERSITY ENGINEERING FACULTY
DEPARTMENT OF PETROLEUM AND NATURAL GAS
ENGINEERING
IMPROVED RESERVOIR EVALUATION
Project Design 1
PGE-405
Submitted to the Petroleum and Natural Gas Engineering Department in Partial
Fulfilment of the Requirements for the Degree of Bachelor of Science
Prepared By
Modou.L.Jarju (20157408)
Near East University
December, 2017
Nicosia

2. TABLE OF CONTENT
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What Is Reservoir Evaluation ?
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Why Reservoir Evaluation ?
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Formation Evaluation
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Key parameter in formation evaluation
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Technical Issues Face in Reservoir Evaluation.
i. Planning
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Wireline Logs As tools for Reservoir Evaluation.
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Reservoir Evaluation and Productivity.
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i. Pressure History Match
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productivity
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Economic Impact Of Reservoir Evaluation

3. What is reservoir evaluation?
This refers to all geological,geophysical as well as engineering techniques
utilized to ensure a better understand of the downhole formation fluid as
well as rock properties for better decision making on the way forward on
a field.

4. Why Reservoir Evaluation?
The number one objective for reservoir evaluation is to understand
the formation properties of the reservoir for better decision making
on the estimation of hydrocarbon volume, assess recoverable
reserves, and prioritize development based upon the value of the
various resource classes in the asset.
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This is better done by understanding the following:
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1.Size
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2.shape
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3.lithology
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4.reservoir characterization of properties
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(e.g. porosity, fluid composition, SW).
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5. Formation Evaluation
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Wireline logs
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Permeability
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Porosity
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Saturation
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Depth
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Size
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Temperature
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Pressure
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All these data together with seismic helps in making a better evaluation
on the reservoir formation.(COMMERCIAL)

6. Key Parameters in Formation
Evaluation
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Fluid Composition:Pvt /DFA
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Water Saturation: well logs / NMR
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Size: seismic
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Volume: volumetric/Diffusivity
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Permeability
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porosity

7. Technical Issues in Reservoir Formation Evaluation
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Planning/Procedures
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Time Factor
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Special Techniques and Equipment's(e,g XLD &NMR)
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Tool and Fluid Optimizations
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DFA(AFA) WFT XLD NMR have been used in special cases
o solve issues relating with Evaluations.
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8. Planning

9. Wireline Logs
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This is the common meeting ground for many diverse formation
evaluation technique.
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Geologies,geophysicist,as well as engineers make use of them in
their evaluation.
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Used for
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Well-to-well correlation
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Subsurface facies analysis
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Subsurface structural & stratigraphic mapping
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Subsurface Pressures etc.

10. Wireline Logs

11. Reservoir Evaluation and Productivity
Volume of hydrocarbon can be calculated
1. directly by volumetric methods
•
Accuracy depends on :
i. Porosity, ii.net thickness, iii. areal extent,
iv. hydrocarbon saturations
Easily deduced from formula,
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2. indirectly by material balance methods
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Accuracy depends on
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i. pressure surveys, temperature surveys ,iii. analysis of recovered fluids.
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The following must also be considered:
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Drive mechanism(presence of aquifer).
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History matching*****
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Deliveribilties

12. Pressure History Match

13. Productivity
With the intervention of proper reservoir evaluation A field in
Germany(chatian Filed) was saved by the outrunning technique
which resulted in increasing the fields Recovery from 69%
(50MMcf/D) to 74% ( 75MMcf/D).
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14. Economic Impact Of Reservoir Evaluation
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The economic Impact of reservoir evaluation is enormous.
Basically if proper reservoir evaluation is done on a field the
outcome must reflect to the productivity which in tuns favors the
economy.
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OOIP
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RESERVES
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MOVABLE FLUID SATURATION
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ETC

15. Conclusion
Reservoir evaluation is a conventional practice in the oil
industry which is done purposely to understand the formation
to pave the way forward on any development on the field.
However,In Some cases it requires some special techniques
as well as new equipments and technology in other to get the
desired results from the evaluation process.
Reservoir evaluation has a very significant impact on a field. It
helps in understanding the filed as well as increase the
productivity and hence add significant value the economy.

16. Thank you !!!!