|
|
|
OTHER INITIATIVES
|
 |
| |
 |
PRODUCING THE CLEANEST
FOSSIL FUEL IN THE MOST RESPONSIBLE WAY
Questar policy states that the corporation "will conduct its operations in
a manner that respects the natural environment."
By definition, drilling for natural gas creates some surface disturbance.
However, on the Pinedale Anticline in western Wyoming, Questar has adopted
a technique used extensively on offshore platforms to develop its acreage
with a fraction of the disturbance created by development of a traditional
natural gas field.
The technique is directional drilling.
Drilling a conventional vertical onshore natural gas well typically involves
clearing and leveling a two- to four-acre "pad" to support the drilling rig
and related equipment. Each pad and access road remain a visible reminder
of the presence of the well until vegetation reclaims the site.
Directional drilling can make a huge difference. It involves drilling multiple
distant locations from a single pad by gradually steering the drill bit away
from its vertical path a few degrees at a time. Using this technique, a company
can recover gas from a large area without building a new pad for each new
well or moving the rig more than a few feet. At Pinedale, Questar is drilling
directionally up to 16 wells from a single pad, eliminating the need for the
other 15 pads and dramatically reducing the amount of surface disturbance
related to pads, access roads and gathering systems.
Directional drilling is more expensive than conventional drilling. However,
the company anticipates that it can recover some of that extra cost if it
can drill and complete all the wells on a pad in one continuous operation.
At Pinedale, Questar is also pioneering a number of other innovative practices
designed to minimize traffic, dust, noise and visual impacts.
Along with natural gas, each well produces a certain amount of water and condensate
(petroleum liquids). Traditionally, these liquids are stored in tanks at each
well until they can be loaded into tanker trucks. When all Questar's wells
are completed, they will need about 25,500 visits a year by tanker trucks.
So what's the alternative? In 2005, Questar began construction of a $25 million
pipeline system that will eliminate the need for these tanker trucks and most
of the storage. Eliminating storage tanks also means eliminating the petroleum
vapors that escape from the tanks.
At its Pinedale wells, Questar is also using equipment designed to drastically
reduce the need for "flaring" (venting and igniting) natural gas during the
well-completion process.
So is there a way to tap natural gas deposits in a more responsible way? Questar
thinks so. |
|
|
|