Hughbert Collier, Ph.D., P.G. Senior Vice President

Stephenville, TX (254) 396-0446

SandstoneAquifer

Wireline logging is often the best method of imaging the subsurface because: •  Immediately available at the wellsite •  A continuous record of the borehole •  Repeatable •  Synergistic

SandstoneAquifer

Borehole geophysical logs provide a wide range of information for groundwater/environmental studies: •  Identifying/ characterize aquifers and aquitards •  Identifying contaminant plumes •  Identifying fluid movement •  Ground-truth surface geophysical studies

Formation properties •  Depth •  Thickness •  Mineralogy •  Porosity •  Water quality (relative salinity) •  Radioactivity •  Temperature •  Bulk density

open or nonmetallic casing

•  Hydraulic conductivity •  Fractures •  Depositional facies •  Moisture content in the vadose zone •  Confining beds

Borehole Characteristics •  Diameter (including washouts and constrictions) •  Volume •  Static water level •  Fluid flow (direction and velocity)

Stratigraphy •  Extent of aquifers and confining beds •  Depositional facies

•  Design well test •  Place Screen •  Complete wells

•  Evaluate well completions •  Design well remediation

•  Water Content •  Porosity •  Water saturation

•  Water Chemistry •  Salinity •  Composition

•  Lithology •  Temperature

•  TrinityWell•  NorthTexas•  HowDeeptoScreen?

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www.collierconsul,ng.com(254)968-8741