Playbooks Supplements

Scoop-Stack Playbook 2017

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SCOOP/STACK: PRODUCTION FORECAST 46 | September 2017 | hartenergy.com reflects a wide swath with numerous location oppor- tunities, TGS clearly sees high concentrations of the 2017 new locations across northern half of the Stack. Which operaters are investing in new locations? In the last 12 months 1,206 new drilling permits have been approved in the Scoop/Stack, which corroberates industry commitment to belief in sustained economic viability of the play. Further, there is a wide range of players as 133 different operating companies filed permits in the last 12 months (Figure 4). The top 10 operators in the region account for 748 permits or 62% of the total. EUR analysis of the play Where are the biggest wells? EUR hot-spot maps are an effective way to visually reveal high value wells across an entire play or basin. Since the Scoop/Stack is both an oil- and liquids-rich province, when cal- culating EURs and ranking commercial success of wells, one must consider many wells produce both gas and oil and, therefore, account for the economic value of different commodity streams. Calculating EURs requires three different unit-of-measurement perspectives (boe, oil and gas) to obtain accurate results. To properly identify spatial patterns of the highest performing wells within the area of interest, mapping of EURs is best performed as a three-tier approach. The first look is total boe ultimate (bbl), defined as the total EUR of a well using a 6-1 ratio to convert Mcf to barrels equivalent. The second is total oil ultimate (bbl), and last total gas ultimate (Mcf). Finally, combining hot-spot maps with a gas- oil-ratio (GOR) window map (cf/bbl) completes the picture between oil and gas commodity streams. Figure 5 shows forecast data from all producing formations in the area of interest. Interpreting the oil and gas window-GOR (cf/bbl) The TGS Well Performance Database calculates and maintains GOR values for all wells. The GOR value is calculated from the monthly oil and gas produc- tion volumes reported for each well. The individual volumes are summarized to a cumulative total and a ratio calculated and measured as gas (cf) per oil (bbl). Mapping GOR values across the play visually inter- prets the wet and dry windows relative to oil and gas EUR values. Asset evaluators can focus on high value acreage correlated to the different commodity streams. Additionally, GOR maps are normalized to a specific producing formation to identify the transition line from oil to gas for a specific zone. As 200 180 160 140 120 100 80 60 40 20 0 August-14 October-14 December-14 February-15 February-16 February-17 April-15 April-16 April-17 June-15 June-16 August-15 August-16 October-15 October-16 December-15 December -16 Permit Count Permit Approved Date FIGURE 2. Drilling Permit Counts in Scoop/Stack by Month Approved

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