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Water Flooding Pattern

The document discusses the selection of water flooding patterns for petroleum engineering projects, emphasizing the importance of maximizing contact between injection fluid and crude oil. Key factors in pattern selection include reservoir characteristics, well locations, and desired recovery outcomes. Various types of well arrangements are outlined, including irregular, peripheral, regular, crestal, and basal injection patterns.

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168 views12 pages

Water Flooding Pattern

The document discusses the selection of water flooding patterns for petroleum engineering projects, emphasizing the importance of maximizing contact between injection fluid and crude oil. Key factors in pattern selection include reservoir characteristics, well locations, and desired recovery outcomes. Various types of well arrangements are outlined, including irregular, peripheral, regular, crestal, and basal injection patterns.

Uploaded by

m mody
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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WATER FLOODING PATTERN

ALI MOUSTAFA ELSAYED WAHBA ELLAITHY


ASSISTANT PROFESSOR
PETROLEUM ENGINEERING DEPARTMENT
FACULTY OF PETROLEUM AND MINING ENGINEERING
SUEZ UNIVERSITY

E-mail: a.wahba@suezuni.edu.eg
Tel.: (+20) 1021122314 – (+20) 1555545827
1
WATER FLOODING PATTERN
• One of the first steps in designing a water flooding project is flood
pattern selection.

• The objective is to select the proper pattern that will provide the
injection fluid with the maximum possible contact with the crude oil
system.

2
WATER FLOODING PATTERN (CONT.)
• This selection can be achieved by:

1. Converting existing production wells into injectors.


2. Drilling infill injection wells.

So, In general, the selection of a suitable flooding pattern for the


reservoir depends on the number and location of existing wells.

3
WATER FLOODING PATTERN (CONT.)
• When making the selection, the following factors must be considered:

1. Reservoir heterogeneity and directional permeability.


2. Direction of formation fractures.
3. Availability of the injection fluid (gas or water).
4. Desired and anticipated flood life.
5. Maximum oil recovery.
6. Well spacing, productivity, and injectivity

4
TYPES OF WELL ARRANGEMENTS
(WATER FLOODING PATTERNS)
1. Irregular injection patterns.
2. Peripheral injection patterns.
3. Regular injection patterns.
4. Crestal and basal injection patterns

5
IRREGULAR INJECTION PATTERNS
Causes:
1. slant-hole drilling techniques.
2. Some small reservoirs with a limited number of wells.
3. Faulting.
4. Localized variations in porosity or permeability.

6
PERIPHERAL INJECTION PATTERNS
• The injection wells are located at
the external boundary of the
reservoir and the oil is displaced
toward the interior of the reservoir.

7
REGULAR INJECTION PATTERNS
1. Direct line drive.
2. Staggered lin e drive.
3. Four spot.
4. Five spot.
5. Seven spot.
6. Nine spot

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CRESTAL AND BASAL INJECTION PATTERNS
• In crestal injection, the injection is through
wells located at the top of the structure.
Ex: Gas injection projects typically use a
crestal injection pattern.

• In basal injection, the fluid is injected at the


bottom of the structure.
Ex: Many water-injection projects use basal
injection patterns with additional benefits
being gained from gravity segregation.

11
THANK YOU
12

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