Tanada wrote:
This graph goes out just five years and shows a very slow decline rate the fifth year. Now that Bakken drilling has been ongoing for eight years does anyone have a longer graph showing actual decline rates for years 6,7,8?
The USGS put out their graphs on sub-units within the Bakken across 10 years. Figures 5-6-7-8.
They didn't do it as percentages, and the resolution looks monthly. The one you show from seekingalpha looks terribly linear across months, when production decline usually isn't.
Tanada wrote: A lot of folks are banking on the idea that the 10% production rate will more or less continue for a decade or longer, but given how long the current technology has been in use we do not have empirical data to back that up. Data for 6,7,8th year for the earliest wells however should provide a glimmer as to how realistic those hopes may be.
Decline rates tend to stabilize in the tails, and I've only seen one analysis of this before, at a PTTC conference in Morgantown, back in 2011. Someone had compared tail stabilization rates across plays, turns out quite a few kicked over into an exponential decline of between 5-12% at some point in time, and they had plotted it so you could see when. Initially, month over month rates can be quite high, which tends to be where the doomer focus goes.
Tanada wrote:I ask because a recent interview I heard was firmly along the lines that while the 10% total fluids metric was more or less accurate the water cut starting in year 5 started making up a substantial fraction of that total. The implication being that by year 15 the water cut would be the majority of the flow and only stripper operators with cheap disposal wells for the water would still keep those wells flowing.
Water cut doesn't tend to change in wells in resource plays. It is higher earlier because of frack flowback water, but you can see that effect dropping out after about 2 years. Then you are talking about produced formation waters.
Tanada wrote:What I mean is, say company U drills, completes and produces a lot of wells in the Bakken. Then they create a subsidiary company W. When a well comes in with its high production they get pay back for the investment we are told in the first two years of production (at least that is what I have heard) then from years 3,4,5 they get profit taking because the well is paid off even though the production is 15% of initial and falling. In year 6 they 'sell' the well to their subsidiary/stripper division and that unit keeps producing for as long as possible. Company U gets the low production rate well off of their books making their portfolio of wells look more productive on average and letting them draw in investors, sell stocks, or both. How long company W actually keeps the legacy well producing will depend on total flow and water cut and the expenses involved in disposal, price of crude and so on, and so on.
I am familiar with the process you describe, and have been part of it on multiple occasions. And it isn't just about a company forming a subsidiary...bankruptcies work in a similar fashion. Wash away the debt load of the original CapX expenditure from Company A, Company B acquires it for pennies on the dollar in a downturn, makes a mint during the next commodity cycle. As part of a growing company post-86, this was exactly the means of growth. Purchases from companies that were about to go under, and those that had, in which case we acquired them through bankruptcy. Didn't drill a single well on the acreage either, just wanted the existing production.