XSPOC Gas Lift Analysis Input Guide

Select a controller and make sure the Application for that controller is Gas Artificial Lift.

Enter your well design

Valves are necessary for a complete analysis, but you can obtain some basic analysis without it. You can copy and paste into this grid from a program like Excel, you don’t need to enter everything by hand again if you already have the data in a good format.

Enter downhole equipment.

You can enter your perforation data but for analysis we only need the mid-perf Depth enter that, so you can also choose to just as shown.

Enter IPR data. You do not need to enter data for every new well test, but you need to provide at least one full set of IPR data ( SBHP, FBHP, Bubblepoint Pressure, Production Rate ) and save it. XSPOC will then propagate your settings to subsequent well tests.

The common configuration is shown: Water Cut and Gross Rate set to From Well Test, FBHP set to be calculated. You can also choose a manual input for FBHP or any other value, and XSPOC will propagate that value to generate IPR data for subsequent well tests.

If you choose to calculate your FBHP, you need to make sure that the necessary data is available. The tab will list out missing values. For missing values that are measurement data, see the next section for how to make sure they are entered correctly.

Measurement Data

XSPOC analyzes well tests. For the measurements shown below, it will look for data that occurred during the period of time prior to the well test date that matches the well test duration. If it doesn’t find any it will select the most recent data point that is still prior to the well test date.

For example, for a well test on 10/17/2018 with the default duration of 24 hours, XSPOC will look for data dated from 10/16/2018 00:00:00 to 10/16/2018 23:59:59 ( just before midnight ). If there are multiple values, they will be averaged. If there were no values at all, the most recent value prior to that time range will be taken.

XSPOC prefers scan values but for data with static data points, like Oil API, you can enter one manual value, dated prior to your well tests, and XSPOC will choose that value over and over for new well tests, until a newer value is given.

XSPOC provides a default feature for measurement data. If you do not provide data for any required measurement, the analysis will fall back to the default value.

These default values can be configured on a system-wide basis. An administrative user can go to tblAnalysisInputDefaults and update the DefaultValue field for any Param Standard Types used in analysis. Gas Lift is ApplicationId 7.