Lodgepole: 67 Days Out of Control

Authentic Equipment edition · 7:33.542

The original drilling rig is identified as Nabors 14E by ERCB D84-9. The eight actual-well inquiry photographs are retained once each with critical commentary and phase-specific credits. Six brief analytical excerpts of the inquiry’s technical drawings identify the actual rotary arrangement, post-removal BOP exhibit, degasser, replacement capping equipment and unbuilt relief-hole plan. All modern drilling, unrelated fire and contemporary equipment footage has been removed. Original equipment diagrams follow the inquiry’s documented arrangements and are labelled functional schematics, not equipment likenesses. Original mast make/model is not claimed. The planned relief hole is explicitly not drilled. Dated community and regional images remain separate from well-equipment evidence.

Control is lost

At about half past two on the afternoon of October seventeenth, the drill pipe began moving upward. The sequence described by the inquiry led to damaged surface connections and mud and gas escaping through the drill pipe. The well was out of control. Amoco Dome Brazeau River, thirteen twelve. A particular place on the Alberta land survey, about twenty kilometres west of the hamlet of Lodgepole. This is Lodgepole: a blowout, a community, an inquiry.

The target and the warnings

The target was a Nisku reef. Amoco interpreted it as an isolated pinnacle near a larger carbonate bank. The company expected an oil reservoir, while recognizing that sour gas and condensate were possible. A reservoir is rock. Fluids occupy spaces within it. Some spaces are small pores between grains or crystals. Others are larger cavities. The reservoir target and the place where the rig stood were not directly above one another. The surface location was moved because of environmental concerns near the Pembina River. The well was then drilled directionally toward its target. In mid-October, the crew began taking core. A coring tool cuts a ring through the formation, allowing a cylinder of rock to be recovered inside a barrel. The early cores from thirteen twelve contained visible cavities. The inquiry also records the smell of hydrogen sulphide.

Two paths and conflicting signals

To understand what followed, picture the well with two paths for fluid. One lies inside the drill pipe. The other is the space around it, between the pipe and the surrounding well. That surrounding space is called the annulus. During ordinary drilling circulation, fluid travels down inside the pipe and returns through the annulus. Its weight also helps oppose the pressure of fluids in the formation. If formation fluid enters the well unintentionally, the industry calls the influx a kick. A kick creates a control problem. It does not automatically mean that uncontrolled flow at the surface has begun. Late on October sixteenth, the observations did not present one simple, consistent picture. The inquiry describes mud splashing at the surface, a sharp rise in the mud logger's gas reading, and a strong hydrogen sulphide odour. A flow check appeared to show no flow. Pressure gauges initially read zero. Later, problems with the casing pressure instruments became apparent. The record also describes trouble with equipment intended to remove gas from the drilling fluid. A zero on a dial can be meaningful, but only if the measurement can be trusted. A drill pipe is hollow. Closing a seal around its outside does not, by itself, close the passage inside it.

Beyond the lease

From this point, the response had two urgent fronts. Specialists had to recover control of a damaged, flowing well. Beyond the lease, people needed information about a release whose behaviour and consequences were still being assessed. Sour gas contains hydrogen sulphide. Hydrogen sulphide is colourless. Its familiar odour can also become an unreliable warning because the ability to smell it can be lost during exposure. The inquiry found important shortcomings in communication. It could regard a monitoring program as effective in its own terms while also finding that the results and their meaning were not communicated adequately.

Plan B and the fires

At the well, one proposed solution depended on the remaining drill pipe dropping down the hole. That approach became known as Plan B. The possibility that the pipe could instead be forced upward was recognized. On November first, the pipe shot out. The location caught fire, and the derrick collapsed. The emergency had entered another phase. On November fourteenth, the first fire was extinguished. The well continued to flow. Burning hydrogen sulphide produces sulphur dioxide, itself a hazardous gas. On November sixteenth, two employees of Wild Well Control died from hydrogen sulphide poisoning during a capping attempt. The inquiry did not support a simple portrayal of Wild Well as inexperienced. Nor did it find evidence that Amoco's control decisions were governed by cost. On November twenty-fifth, the well caught fire again. The inquiry identified burning material beneath the muskeg as the probable source of ignition. The renewed fire changed the conditions around already damaged equipment. The next major effort would seek to cap the well while it was burning. Wild Well declined to undertake that approach. Boots and Coots was brought in during December. A burning well combines a continuing supply of fuel with a source of intense heat. A successful intervention has to address the flow even as the surrounding conditions complicate access to the equipment.

Control at last

A relief well approaches a flowing well through another drilled path. Its purpose is to create a route for bringing the original well under control when working through the existing surface equipment is difficult or impossible. At Lodgepole, a relief well site was prepared, a suitable rig was placed on standby, and a drilling program was designed. The eventual control of thirteen twelve came through the surface effort instead. On December twenty-third, a replacement control assembly and weighted drilling fluid finally brought the well under control. The uncontrolled flow that had begun in October was stopped. The achievement depended on recovering a connection through which the well could be managed, and establishing a pressure condition that could oppose the formation fluids. The surface hardware and the fluid served related purposes within that effort. Further securing work followed. The inquiry records the installation of a packer on December twenty-eighth. A packer is a sealing device used within a well.

Consequences and causes

Residents reported symptoms during the blowout. The inquiry considered those accounts alongside the available monitoring and health information, and concluded that exposure to emissions was a probable cause of reported temporary health effects in the region. It also identified important gaps in the evidence. The inquiry also examined damage to vegetation and soil near the well, along with questions about contamination and reclamation. The end of uncontrolled flow did not answer those questions by itself. The inquiry did not reduce the loss of control to one isolated failure. It identified a sequence involving coring practices, the fluid's density, recognition of kicks, equipment problems, and the availability of prepared drilling fluid. A supply of suitable fluid mattered because a plan required material that could actually be used when needed. People connected these parts. They observed changes, assessed competing explanations, and decided what to do next. The inquiry also considered the demands on supervisors and the need for earlier support.

Experience and change

Another nearby well had blown out in nineteen seventy-seven. That well is identified in the record as seven ten. Our story concerns thirteen twelve, in nineteen eighty-two. The inquiry considered what experience in the area should have meant for planning the later well. The wider review was issued first, in April nineteen eighty-four. The detailed report on the blowout followed in December. The record describes attention to critical sour well requirements, licensing, inspection, training, and equipment. It also addresses coordination and communication with the public. The Pembina Institute traces its origins to rural Albertans who organized after the blowout and formed the institute in nineteen eighty-four. That is the organization's own account of its beginnings.

The cost

Two men died. The well flowed out of control for sixty-seven days. Lodgepole remains in the record because the consequences reached beyond one piece of equipment and one lease. The next well would begin with another interpretation of the rock. The responsibility was to carry what had been learned into everything built around that interpretation. Thank you for listening to GeoNavigate Industry Chatter.

Visual credits and bounded uses

Eight inquiry photographs appear once each. Six brief technical-figure excerpts support criticism and review of the equipment evidence; this is not a licence or public-domain assertion. Neither the photographs nor the figure excerpts are authorized for standalone redistribution.

Historical and technical sources