13 Oct

Welltest 200: PTA Tool Kit

More than Just PTA… Checking differentials provides added value. The operator was ready to walk away from this well due to uneconomically low gas rates. However, note the huge tubing/casing differential, not to mention the casing pressure trend shift
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09 Sep

TechTips

Did you know that Alberta gas wells with deliverability over 300 e3m3/d require multi-rate or isochronal flow tests? Moreover, but little known, is that: if you didn’t do a multi-rate test, but did do a pressure build-up test, and
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25 Aug

Welltest 200: PTA Tool Kit

PTA is a Completions and Workover tool when we test for skin — near wellbore damage. Oil well productivity (IPR), gas well deliverability (AOF), and water well injectivity, are all a function of flowing conditions between the rock matrix
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22 Jul

Welltest 200: PTA Tool Kit

So are we… Re-branding with a fresh new website to publicize our Technical Coaching employee training and development material. Corporate directors, managers, and stakeholders depend on realistic, practical, advice from testing wells. Petroleum Reservoir and Production Engineering teams initiate
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14 Apr

D40.4: Clarification of Minimum Requirements

Well test information is critical for the prudent management of oil and gas reservoirs. Well testing is thus an integral part of the overall production and depletion strategy of a reservoir. The Alberta Energy Regulator (#AER) defines the minimum
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07 Apr

D40.3: Summary of Basic Minimum Requirements

Regulations pertinent to Alberta well testing are contained in the Oil and Gas Conservation  Regulations. Section 11.102 authorizes #AER Directive 40 (D40) to set well test requirements and standard procedures, as well as compliance and enforcement protocols.
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13 Feb

Welltest 106: Impulse & Closed Chamber Tests

Exploitation Correlations. Exploitation correlation plots can be developed for specific fields and pools. Enough tests and end-results need to be monitored so correlations can be observed. Eventually these plots are used for making on-site real-time tie-in or fracture treatment
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11 Feb

Welltest 106: Impulse & Closed Chamber Tests

Proving Movable Reserves. In this example a high permeability sandstone overlaid a shale zone. Decline curve analysis indicated natural gas (#LNG) reserves greater than volumetrics could justify. It was hypothesized that the shale gas reserves migrated vertically, due to
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06 Feb

Welltest 106: Impulse & Closed Chamber Tests

Perforation Inflow Distribution Diagnostic (PIDD) Tests. The PID #welltest is analogous to production logging when two or more intervals are perforated. Based on changes to the Dp/Dt slope, gas (#LNG) inflow and AOF ratios can be estimated. Starting with
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04 Feb

Welltest 106: Impulse & Closed Chamber Tests

Perforation Inflow Distribution Diagnostic (PIDD) Tests. The PID #welltest is analogous to production logging when two or more intervals are perforated. Based on changes to the Dp/Dt slope, gas (#LNG) inflow and AOF ratios can be estimated. Starting with
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