Sentences with phrase «active drilling areas»

The average methane concentration in shallow groundwater in active drilling areas fell within the defined action level (10 — 28 mg L - 1) for hazard mitigation recommended by the US Office of the Interior (13), and our maximum observed value of 64 mg L - 1 is well above this hazard level (Fig. 3).

The average δ13C - CH4 value in shallow groundwater in active drilling areas was -37 ± 7 ‰, consistent with a deeper thermogenic methane source.

One of two landmen assigned to the only active drilling area in the company's Appalachian Asset Group where my responsibilities include managing four rig lines drilling one - offs within the prospect area.

Not exact matches

PDC Energy is an exploration and production company headquartered in Denver, Colorado focused on value - added organic growth through active horizontal drilling programs and bolt - on acquisitions in its core areas.

• Ambient and occupational air quality should be measured at active drilling sites and be compared with baseline measurements in adjacent areas without drilling operations.

When the coring area was chosen, precision drilling was necessary to avoid an active drain line (0.7 inches away), vertical rebar, and the vertical section of the dousing tank nine feet below.

In many seismically active areas, high - temperature, high - pressure water trapped below the surface can be accessed by shallow drilling.

Methane concentrations were 17 - times higher on average (19.2 mg CH4 L - 1) in shallow wells from active drilling and extraction areas than in wells from nonactive areas (1.1 mg L - 1 on average; P < 0.05; Fig. 3 and Table 1).

Consequently, the high methane concentrations with distinct positive δ13C - CH4 and δ2H - CH4 values in the shallow groundwater from active areas could in principle reflect the transport of a deep methane source associated with gas drilling and hydraulic - fracturing activities.