Predico Data Model

Volumes (Time Series Data)

Oil volume

oil_volume

bbl

standard barrel

volume of oil produced per time period (i.e. day), and used to calculate oil rates.

Condensate volume

condensate_volume

bbl

standard barrel

It is possible for a company to distinguish between condensate and oil in the SCADA System

Bitumen volume

bitumen_volume

bbl

standard barrel

Used more often in very low API projects (Venezuela, Canada, Russia, some Middle East). Very low API (SAGD, and other thermal or mining methods)

Water volume

water_volume

bbl

standard barrel

volume of water produced per time period (i.e. day), and used to calculate oil rates.

Total fluid volume

liquid_volume

bbl

standard barrel

In addition to oil and water, some SCADA systems actually also record the total fluid rate using a Coriolis meter or similar

Gas volume

gas_volume

MMscf

Million standard cubic feet of gas.

volume of gas produced per time period (i.e. day), and used to calculate oil rates.

Pressures & Temperatures (Time Series Data)

Tubing pressure

tubing_pressure

psig

pounds per square inch (gauge)

Pressure inside tubing or conduit

Casing pressure

casing_pressure

psig

pounds per square inch (gauge)

Pressure inside ANNULUS

Wellhead pressure

wellhead_pressure

psig

pounds per square inch (gauge)

A generic name used in some SCADA systems.

Flowline pressure

flowline_pressure

psig

pounds per square inch (gauge)

A generic name used in some SCADA systems. Often just slightly downstream of wellhead

Pump Intake pressure

pump_intake_pressure

psig

pounds per square inch (gauge)

ESP, PCP and other pumps often have an intake pressure measurement which can be used for RTA and/or PTA purposes

Pump Discharge pressure

pump_discharge_pressure

psig

pounds per square inch (gauge)

ESP, PCP and other pumps often have a discharge pressure measurement which can be used for RTA and/or PTA purposes

BHP

bottomhole_pressure

psig

pounds per square inch (gauge)

From either temporary (PTA) or permanent downhole gauges (PDG) located downhole, or near bottom hole.

Usually NEED a reference depth

AWS Pressure

aws_pressure

psig

pounds per square inch (gauge)

Pressure measured using an AWS device. It is another type of wellhead pressure.

Static Pressure

static_pressure

psig

pounds per square inch (gauge)

These are shut-in pressures and/or estimates of reservoir pressures as a function of time.

BHT

bottomhole_temperature

oF

pounds per square inch (gauge)

Almost always measured with BHP (see above)

Usually NEED a reference depth

Wellhead temperature

wellhead_temperature

oF

temperature

temperature at surface. Sometimes also called flow temperature

Fluid Level

fluid_level

ft

feet

Depth from surface to liquid level. Often measured using an acoustic well sounder, but some modern ESP, PCP etc tools may have integrated wellhead equipment for this.

Dates and Times (Time Series Data)

Uptime

uptime

days

Time

Used to convert between producing day and calendar rate. Time the well is flowing during the measured period

Downtime

downtime

days

Time

The opposite of Uptime

Date

date

A Cumulative Time Measurement

PVT (Time Series data)

Average Liquid Density

liquid_density

lb/ft3

Pounds per cubic foot

often measured with Coriolis meter. This data in often in their SCADA system (Reservoir Eng may not know), but it may exists in a Historian or other common database.

Average Oil Density

oil_density

lb/ft3

Pounds per cubic foot

See Above

Average Water Density

water_density

lb/ft3

Pounds per cubic foot

See Above

Oil API

oil_gravity

API

SPE Unit

See Above

Gas Gravity

gas_gravity

Dim

Dimensionless

See Above

Pumps (Time Series Data)

Pump Speed

pump_speed

RPM

Revolutions per minute

Often mentioned by companies with either ESP or PCP

Pump Speed PJ

pump_jack_speed

SPM

Strokes Per minute

Specific to Pump jacks.

Pump Efficiency

pump_efficiency

Percent

Percentage

Pump efficiency is common to many times of pump. Often

Pump Torque

pump_torque

lb-ft

Force x Distance

Amount of work exerted

Identifiers (usually one per well)

Well name

well_name

text

Corporate ID

Well Licence

well_license

text

Government ID

Well Status

well_status

text

Suspended, Flowing; Pumping; injector; producer; storage and similar

Longitude

longitude

DD

Decimal Degrees

Important to consider when working with GIS plotting, or mapping of results etc.

Latitude

latitude

DD

Decimal Degrees

Important to consider when working with GIS plotting, or mapping of results etc.

Easting

easting

TBA

UTM Coordinate. Important to consider if we ever want to work with GIS plotting, or mapping of results etc.

Westing

westing

TBA

UTM Coordinate. Important to consider if we ever want to work with GIS plotting, or mapping of results etc.

Area

area

text

Used to identify project or asset or location

Project

project

text

Used to identify project or asset or location

Geodomain

geodomain

text

Used to identify project or asset or location

Asset

asset

text

Used to identify project or asset or location

Field

field

text

Used to identify project or asset or location

Business Unit

business_unit

text

Used to identify project or asset or location

Zone

zone

text

Used to identify the target reservoir