Record of Quality: Sample Selection and Approval

Sample Selection and Approval

Introduction

The Record of Quality (RoQ) page is intended to facilitate the creation, review and approval process for monthly balances. This article will describe how to use the RoQ page for the preparation of monthly balances.

Stream Approval Process

Gas plants often have hundreds of streams to account for every accounting period with each stream having multiple samples available to choose from as the RoQ. With support from Validere staff, the RoQ page facilitates the selection process using an auto-select for the majority of streams that have samples which fall within expected historical values. 

However, there will likely be a number of streams which will require review and approval by the production accountants and managers. The presence of streams requiring approval is indicated in the top right hand corner of the RoQ page. In the screenshot below, we can see that there are three streams requiring approval for the March 2020 balance.

Streams Requiring Approval

Streams requiring review have three possible states:

  • Approved
  • Approval Required
  • Error

To find the streams that require approval more easily, use the search filters as shown below:

Quantifying the Impact of a Selection Prior to Approval

Choosing a certain sample when there are multiple options available can materially change the final result of the balance. In many cases, it can be beneficial to quantify the impact of the available options before making a final selection. In the example below, this use-case is demonstrated for 'Execuva Well 06-07' which is a stream that still requires approval:

RoQ Calculation Methods

There are four methods for calculating an RoQ:

  • Average: uses the average of the available samples, equally weighted
  • Earliest Sample: uses the earliest available sample
  • Latest Sample: uses the latest available sample
  • Volume Weighted Average: uses custom sample selection by user, and weights average of the samples by volume

These methods can be selected for each individual stream as shown below:

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