Friday, March 22, 2013

Weyerhaeuser Results

Three results are now confirmed for wells on the Weyerhaeuser leases. I waited until I was able to confirm rates.  In the past, I've posted on the process regarding submitting initial potentials to the regulatory agencies.  Encana's initial potential posted on SONRIS for the Weyerhaeuser 60H-1 appears to be an early rate prior to clean up.  The 60H-2 appears accurate.
  • Encana Weyerhaeuser 60H-1: 1100 boepd; 24 hr test (Source: Goodrich Petro.)
  • Encana Weyerhaeuser 60H-2: 288 bo x 85 mcf x 528 bw; 11/64 CK; 295 GOR; 39 gravity
  • Devon Weyerhaeuser 72H-1: 336 bo x 106 mcf x 312 bw; 9/64" choke; GOR 315; gravity 40

The charts below present updates on results compared to frac job parameters.  It's still a challenge to compare "apples to oranges", but key factors impacting results are landing zone location, proppant levels, fluid levels, and reservoir thickness and oil saturation.  The 60H wells indicate that the proppant volume has limits as predicted in a prior post.  The linear curve "rolled over" hard on these wells.  Once again, Devon gets a good result compared to the minimum about of proppant placed. The Weyerhaeuser 72H produced 336 bo with an average proppant of 124k/stage.  Would 500k/stage result in 1354 bopd?

The chart below compares the initial potential to the total number of stages.  Proppant volume is not considered in this comparison so it's "apples to oranges".  Overall, the four best results have been in wells with at least 24 stages.  For comparison purposes, I define the wells above the "best fit line" as underperform and those below to overperform.  Essentially the overperformers are getting more oil with less stages.

The chart below compares the total amount of proppant used to the initial potential.  The "best fit line" presents a comparison for well performance.  The 60H wells being the farthest displacement from the line indicate that they underperformed more than any other wells based on the amount of proppant placed.  In contrast, the Goodrich Crosby 12H-1 and the Encana Horseshoe Hill 10H-1 stand out as overperformers.

The chart below does align the wells based on the proppant per stage.  There is quite a bit of "scatter" around the "best fit line".  Encana's recent 60H wells illustrate that the extra proppant did not impact the initial potential rate.  Keep in mind, that the higher proppant levels could flatten the decline curve point forward which is important.  I used the "best fit line" to determine whether the well presented a good return on investment (ROI) based on the costs of the completion which is heavily impacted by the amount of stages and proppant.  Devon's Richland Farms 74H-1 had a great result when you factor in the 92k/stage of proppant.  The Goodrich Crosby 12H-1 and the Encana Horseshoe Hill 10H-1 stand out as excellent completion ROI's.  With 18 completions, the Crosby 12H-1 currently stands out as the "model well" for the play.  This well indicates that proppant levels in the 425k/stage range can produce excellent results and economics.  With more results, completion costs can be confirmed allowing for predictable economic projections.

The Encana Ash wells also placed significant levels of proppant. Their landing zone was also higher in the section which could negatively impact the results.  These initial potentials should be out sometime next week.


  1. What impact did choke size have? I notice that the Encana Weyer.60H2 tested with a 11/64 choke while the Devon well tested with a 9/64 choke. I would think that choke size would be a huge factor in comparing the reported IP rates.

  2. Will you comment on whether TMS drilling is transverse or parallel to the play?

  3. Malone, I'm not clear what you're asking when you say "to the play"
    FM, choke size has impact for sure. Smaller choke reduces rate. All the results are "apples to oranges".

  4. I'm sorry. From the well bore, does the lateral boring run along the length of the TMS or does the boring cut across the width of the shale? Thanks

  5. Malone, Ideally you want to pick you "target zone" in the shale from a vertical perspective, then drill horizontally within the target. Sometimes it's easier said then done.

  6. It seems that Horseshoe Hill is average for stages, proppant and total proppant. Like real estate, perhaps location is the most important variable. Thanks again for the Blog.