More on Alberta Annual Pressure Survey Requirements
ERCB–D40, section 4.5.7, states that “…the minimum number of pressure surveys should equal about 25 % of a pool’s producing well count, based on quarter section spacing for oil pools. This translates to one survey per productive section. For gas pools, one survey per four productive sections is required. The reference to “one survey per X productive sections” can be confusing, especially in large gas pools which have not been fully drilled up. In these low density, or low well count pools, surveying 25 % of the drilled...
read moreMilestone 10,002: Working on the Road – Charging Devices
April seems to be a perfect time to mention some of our favourite tools that keep us lean, light, and charged while travelling. Our Targus Laptop Charger is essential for reducing cable clutter and transformer weight. Powering two devices at once, with all the different tips available, and a little proactive attention, we can keep at least half-a-dozen electronics well fed. Nothing is more annoying than that middle-of-the-night BEEP when your phone is hungry. Ours even has the 12 V adapter for the Jeep. You might need only one ultra-light...
read moreMilestone 10,001: Working on the Road – Second Monitor
April seems to be a perfect time to mention some of our favourite tools that keep us lean, light, and productive while travelling. Our most coveted recent acquisition was a Lenovo ThinkVision LT1421 USB monitor. This portable 14″ LCD screen is a dream-come-true for those of us who just can’t work anymore without twin monitors. The new easy-to-remove cover adds tough travel protection to this featherweight accessory that receives power directly from your laptop. Back home it continues working as a third screen! Sweet! Highly...
read more2013 ERCB Annual Pressure Requirements
The ERCB has published the 2013 list of Annual Pressure Requirements. Don’t forget that surface data and acoustic well sounder (AWS) surveys are acceptable for compliance. Since we have a whole year it is a good idea to coordinate testing with a plant turnaround, a pump change, or a routine maintenance shut-in. Testing water or gas injection wells is another good tactic for sustaining oil revenues. What’s not specifically clear in G40 is that Pressure Transient Analysis (PTA) is acceptable for estimating Annual Pressure Oil and Annual...
read morePerforation Inflow Diagnostic Tests
Perforation Inflow Diagnostic (PID) tests satisfy ERCB Initial Pressure requirements. These simplified tests, now in common usage, provide an economical alternative to traditional methods. Basically the well is perforated under-balanced, and the subsequent closed chamber pressure build-up is monitored with subsurface pressure recorders. Data are then analyzed using impulse or closed-chamber theory (PITA) to generate a p*. What’s not specifically clear in G40 is that Pressure Transient Analysis (PTA) is acceptable for estimating Initial...
read morePerforation, Fracture Fall-off, & Formation Leak-off Tests
Perforation, fracture fall-off, and formation leak-off tests satisfy ERCB Initial Pressure requirements. These simplified tests, now in common usage, provide an economical alternative to traditional methods. There are several different scenarios, depending on your completion operation logistics. One method is basically over-balanced perforating and monitoring the subsequent pressure fall-off feed into the reservoir. Another is to land a horizontal multi-stage frac’ string, open the toe hydro-port, and monitor the pressure fall-off feed into...
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