Reporting a Multistage Frac Completion

Use Case Name

Reporting a Multistage Frac Completion


November 2015


CWIS Work Group



Support the business case for the CWIS Standard by showing how to capture data for a complex well completion

Summary Description

All data for a wellbore completion are captured according to depth interval and time interval within a wellbore and tagged with the CWIS identifiers.


Primary: Alberta Energy Regulator (AER), well operator
Secondary: data vendor, data analyst


Question about how to use the CWIS identifiers for multi-stage frac completion data. This is intended to support the business case for adopting the CWIS Standard.


Regulations and practices currently in effect in Alberta concerning well data reporting and UWI assignment.
Assumptions about the use of the CWIS identifiers if adopted.
The well was licensed with UWI 102/12-12…/0. At some time after drilling, the UWI was amended to 100/13-12…/0 based on directional survey.

Primary or Typical Scenario

A horizontal well was drilled and completed for Montney oil production. The multistage fracturing operation was performed in 18 intervals over 3 days, in 3215 m of the open hole. The actual sequence of activity was:

  • Drill the horizontal wellbore from a surface pad.
  • Set intermediate casing at horizontal section.
  • Drill to total depth open hole in the Montney formation.
  • Run in frac string tubing assembly and tie back on April 17.
  • Rig release on April 18.
  • Rig up for completion in July.
  • Conduct Stages 1 to 5 frac on July 26 using ball drop technology.
  • Conduct Stages 6 to 17 frac on July 27
  • Conduct Stage 18 frac on July 28.
  • Well on production August 2.

Alternative Scenarios

Using the existing UWI system for well identification, all the drilling and completion and production data are assigned to one UWI (as amended).


This Use Case assumes that the regulator has adopted the CWIS System. It also assumes some details of the processes used by AER and Petrinex although reality might be different. The identifiers would be assigned as follows:

  • Well ID AB0094566 is published on the drilling licence.
  • Wellbore ID AB0094566B001 is assigned in anticipation of the first wellbore and published on the drilling licence.
  • AER assigns a UWI to support compatibility with legacy systems.
  • The operator reports drilling data for the first (and only) wellbore via the AER Digital Data Submission System (DDS) according to Directive 059. This case makes assumptions of how the Directive would be revised for CWIS.
  • Well logs, tour sheets, casing reports, etc. all have AB0094566 and Wellbore ID AB0094566B001.
  • AER assigns the wellbore data to Wellbore ID AB0094566B001.
  • The operator reports the completion data via DDS, using Wellbore ID AB0094566B001.
  • The operator reports the well status change to oil producer via Petrinex; this includes linking the production to the completion in AB0094566B001.
  • Petrinex assigns Well Reporting ID AB0094566V001 and a UWI.
  • The operator reports monthly production via Petrinex using AB0094566V001 or the UWI (operator’s choice).
  • AER processes the directional survey data and amends the UWI. This does not change the CWIS identifiers.

Business Rules


The following standards and regulatory procedures are assumed for the scenario:

  • CWIS Standard for well identifiers
  • Regulations and procedures of the AER for reporting drilling and completion information (Directive 059) and for reporting production, adapted with assumptions of how Directive 059 would apply if using CWIS.
  • UWI assignment procedure in current use by the AER and Petrinex.



This case is based on a well in northwestern Alberta using data supplied by the operator.



  • What Is A Well? defines “Well”, “Wellbore” etc.
  • UWI as defined and assigned by the regulator (AER) and used by Petrinex.
  • Well ID, Wellbore ID, Well Reporting ID as defined by the CWIS standard.