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Prospect and Play Analysis

Alfred Kjemperud

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Definitions• Petroleum system.

– A group of plays within a given geographical area having a common source rock.

• Play.– A geographically and stratigraphically delimited

area where common geological factors exist in order that petroleum accumulation can occur.

• Prospect.– A potential petroleum trap.– With a mappable reservoir rock volume.

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Petroleum system

Reservoir/Seal distribution

Limit of mature and active Source

Play 2 (confirmed)Play 1

(unconfirmed)

Source Rock Distribution

Field/Discovery

Prospect

Geographical extent of Petroleum System

Modified from R. Birtles, 2000

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• Seismic mapping

Defining structures

Seismic line Prospect Lead

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Prospect or Lead?

• Prospect.– A potential petroleum trap

defined by a grid of seismic lines (at least 2 lines).

• Lead.– A potential petroleum trap

defined by only one seismic line.

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Controlling Factors

• Source• Reservoir• Trap

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Calculation of n

Area for P&L no. factorcalculation (high LOK)n = no.of mapped P&L/area

Green area (Prob.: 0.6-1.0)Max. no. P&L = Area * n * 1.0Mean no. P&L = Area * n * 0.8 Min. No. P&L = Area * n * 0.6

Yellow area (Prob.: 0.4-0.6)Max. no. P&L = Area * n * 0.6Mean no. P&L = Area * n * 0.5 Min. no. P&L = Area * n * 0.4

Total no.of P&LNo. in green area + No in yellow area

Prospect

Lead

Seismic lines

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Play Analysis in GeoX

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Play Analysis in GeoX

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Play Analysis in GeoX

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Play Analysis in GeoX