Oil Field Manager ~ Presentation*OFM helps engineers manage more wells effectively in less time

Data Organisation in OFMAll 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).AccessDBExternal DatabaseOFM

Data Input Levels in OFMMaster 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).CompletionCompletionFieldWellbore

Base Map

Base Map

Filtering Capabilities In OFM

Sample Production Plots

Sample Production Plots

Sample Production Plots

Basic Production PlotProductivity decrease drastically as soon as the water hit the well:AL?, Emulsion problems? Scale? Fines migration?

DCA in OFM

Bubble Maps In OFM ~ Monthly Production

Sample Bubble Maps

Sample Bubble Maps

Sample Bubble Maps

Sample Bubble MapsLesson 3.4

Sample Bubble MapsSample Bubble Maps

Sample Bubble Maps

Sample Bubble Maps

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

OOIP and grid map in OFM

OOIP and grid map in OFMBoi**=

Normalized Mapping (OOIP-Np) MapArea of low recovery efficiency workover potential exist?Area of over recovery efficiency Potential additional pay presents ?

Basic Production MapsBest gas wellZones with very low recovery of gasUndrained zones?Potential for new wells?Stimulation opportunities?

Production Heterogeneity Index

Heterogeneity indexing is -

Comparing individual wells to the average of a well groupA fast way to identify over- and underperforming wells, best completion practices etc.

Desired results and interpretation

Re - perforation AnalysisDue to different perforation techniques, some wells experienced problemsUnderbalanced perforating (through tubing) may not have achieved full penetrationCumulative liquid produced per perf foot is a technique to evaluate perforation productivityGrid map/bubble map results

Damage IndicatorFormation damage analysisSimple damage analysisFormation Damage Index (FDI)

Grid mapPressure transient is preferred for calculating skinTreatment = acidize well to remove damage

Decline Curve Analyses EquationsExponential Decline Conversions (where b = 0)

Hyperbolic Decline Conversions (where 0 < b < 1)

Harmonic Decline Conversions (where b = 1)

DCA in OFMPotential zones with high Reserves

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

Technical DiscussionVolumetric Drainage radius (rev) calculationLiterally, the volume occupied by the produced fluid at reservoir conditionsAssume uniform pressure reservoirVolumetric method

Drainage radius for Np and EURAdditional variable can be displayed with drainage radius to provide insight of reservoir performance

Volumetric Drainage Radius ExampleDrainage Radius at NpUndeveloped spotsDrainage Radius at EUR

The numerator is the ability of well to produce. The denominator is the storage capacity of reservoir to deliver. If a well has formation damage problems, then it will produce at a low rate even though the formation has a high storage capacity to deliver. Hence the formation damage index will be a low value.

This assumption is quite valid during the early day of production. At this point in time, Bfield has been produced for 2 years. Since the wells is less likely to interfere each other in this early production life, infinite acting model is acceptable.