OFM Presentation 00

Oil Field Manager ~ Presentation

April 8, 2023

OFM helps engineers manage more wells effectively in less time

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Data Organisation in OFM All data stored in relational database. Since OFM 2000, OFM uses Microsoft

Access for data storage. Links to other databases possible via

ODBC: Permanent download to Access. Live link to external database (no data

duplication).Access

DB

External Database

OFM

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Data Input Levels in OFM Master Table is used to set the project key.

Corresponds to the lowest level at which data is available (usually either Completion or Wellbore).

Other well information may be included (well co-ordinates etc).

Completion

Completion

Field

Wellbore

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Base Map

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Base Map

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Filtering Capabilities In OFM

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Sample Production Plots

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Sample Production Plots

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Sample Production Plots

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Basic Production Plot

1976 77 78 79 80 81 82 83 84 85 86 87 88 89 900

100

200

300

400

500 160001177110038801S01Oil Rate (Cal. Day) ( bbl/d )

Water Rate (Cal. Day) ( bbl/d )

Liquid Rate (Cal. Day) ( bbl/d )

Unocal - Basic Production Plot #1Cum Gas = 2.992 ( Bcf )Cum Oil = 604.621 ( Mbbl )Cum Water = 115.114 ( Mbbl ) 160001177110038801S01 Flowunit = BU1 6 RDE006

1976 77 78 79 80 81 82 83 84 85 86 87 88 89 900

15

30

45

60

75

0

40

80

120

160

200 Axis 1

Water Cut ( % ) 160001177110038801S01

Axis 2Gas Oil Ratio ( Mcf/bbl ) 160001177110038801S01

Unocal - Basic Production Plot #1Cum Gas = 2.992 ( Bcf )Cum Oil = 604.621 ( Mbbl )Cum Water = 115.114 ( Mbbl ) 160001177110038801S01 Flowunit = BU1 6 RDE006

1976 77 78 79 80 81 82 83 84 85 86 87 88 89 900

600

1200

1800

2400

3000 160001177110038801S01

Cumulative Oil Production ( Mbbl )

Cumulative Gas Production ( MMcf )

Cumulative Water Production ( Mbbl )

Unocal - Basic Production Plot #1Cum Gas = 2.992 ( Bcf )Cum Oil = 604.621 ( Mbbl )Cum Water = 115.114 ( Mbbl ) 160001177110038801S01 Flowunit = BU1 6 RDE006

•Productivity decrease drastically as soon as the water hit the well:•AL?, Emulsion problems? Scale? Fines migration?

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DCA in OFM

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Bubble Maps In OFM ~ Monthly Production

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Sample Bubble Maps

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Sample Bubble Maps

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Sample Bubble Maps

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Lesson 3.4

Sample Bubble Maps

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Sample Bubble Maps

Sample Bubble Maps

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Sample Bubble Maps

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Sample Bubble Maps

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OOIP and grid map in OFM

OFM can calculate the original-oil/gas-in-place for reservoirs. This technique uses the volumetric equation and grid arithmetic.

Boi

gridmapSwigridmapgridmaphAN

))(1(*)(*)(*

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OOIP and grid map in OFM

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OOIP and grid map in OFM

Boi

* *

=

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Normalized Mapping – (OOIP-Np) Map

Area of low recovery efficiency – workover potential exist?

Area of over recovery efficiency – Potential additional pay presents ?

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Basic Production Maps

Best gas well

Zones with very low recovery of gas-Undrained zones?-Potential for new wells?-Stimulation opportunities?

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Production Heterogeneity Index

• Heterogeneity indexing is -

Comparing individual wells to the average of a well group A fast way to identify over- and underperforming wells, best

completion practices etc.

1wellsofaverage

well

value

valueHI

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Desired results and interpretation

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Re - perforation Analysis

Due to different perforation techniques, some wells experienced problems

Underbalanced perforating (through tubing) may not have achieved full penetration

Cumulative liquid produced per perf foot is a technique to evaluate perforation productivity

Grid map/bubble map results

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Damage Indicator

Formation damage analysis Simple damage analysis Formation Damage Index (FDI)

Grid map Pressure transient is preferred for

calculating skin Treatment = acidize well to remove

damage

sr

rB

p

kh

qFDI

w

eoo ln

007078.0

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Decline Curve Analyses Equations

Exponential Decline Conversions (where b = 0)

Hyperbolic Decline Conversions (where 0 < b < 1)

Harmonic Decline Conversions (where b = 1)

b

i

i

tbD

qtq 11

tDi

ie

qtq

tDq

tqi

i

1

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DCA in OFM

Potential zones with high Reserves

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Volumetric Drainage Radius Estimation

Visual representation of the drainage area per well in the reservoir. Areas not being drained by wells are quickly identified visually with bubble

mapping

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Technical Discussion

Volumetric Drainage radius (rev) calculation Literally, the volume occupied by the produced fluid at reservoir conditions Assume uniform pressure reservoir Volumetric method

Drainage radius for Np and EUR Additional variable can be displayed with drainage radius to provide insight of

reservoir performance

ftSSh

BNr

orw

oipev )1(

615.5

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Volumetric Drainage Radius Example

Drainage Radius at Np

Undeveloped spots

Drainage Radius at EUR