GRACast: Water Well Video Logging – Process, Practice and Interpretation

Presented by:

Chris Johnson
Research President of Aegis Groundwater Consulting, LLC

 

Assumptions about well construction, operational conditions and overall integrity can lead to erroneous and sometimes costly misinterpretation of well performance data.  Video logging processes and technology has advanced to the point of being a sophisticated observational and diagnostic tool for hydrogeologist, groundwater professionals and water well contractors.  In practice, video logging allows for visual confirmation of new well construction, and existing well operational conditions unseen from the surface.  Properly setting up the well and logging system, by following specific processes, will reduce the risk of poor observing conditions and results.

In this course, we will review the correct process for setting up both the camera and the well for logging, and how to correctly conduct the logging effort, including new well construction documentation, “indexing” the condition of a well, assessing for water movement via “hovering”, and documenting structural failures through shadow alteration, oblations and direct observation of casing well seams and perforation sections.  Lastly, we will review interpreting the visual findings relative to several current issues, such as vertical gradients influencing water levels in monitored locations, well obstructions reducing inflow and as such both production and accurate water levels, and the effects of both chemical and biological plugging of wells.

 

*Early Registration (May 19) is $75 for Members* and $100 for Non-Members*
*Registration after May 19 is $100 for Members* and $125 for Non-Members*


SPEAKER BIO:

 

Chris Johnson, President of Aegis Groundwater Consulting, LLC, has been a practicing professional geologist and hydrogeologist for 31 years.  Mr. Johnson has extensive experience in aquifer characterization, pumping tests, and in particular with well design, construction, maintenance and rehabilitation.  Additionally, Mr. Johnson has developed an expertise in addressing naturally occurring metals such as arsenic and uranium, specifically identifying the presence in the subsurface prior to well construction, and then designing wells that avoid these areas, resulting in water supplies of reduced metals concentrations in areas of significantly elevated groundwater concentrations.  Mr. Johnson is also a recognized expert in the field of well rehabilitation and well reconstruction and has published several articles on well rehabilitation for the National Groundwater Association’s “Water Well Journal”.

 

MODERATOR BIO:

 

Tom McCarthy serves as the General Manager for the Mojave Water Agency (MWA). MWA is one of 29 State Water Contractors with access to California’s State Water Project, MWA also serves as the Watermaster for Mojave Basin Area. Mr. McCarthy is a State of California registered professional civil engineer, as well as a California registered professional geologist. He has a Bachelor of Science in Geological Sciences from the University of Oregon and a Master of Science in Civil and Environmental Engineering from the University of California, Los Angeles.

When?

Wed, May 24, 2017
12:00 p.m. - 1:00 p.m.

Event has ended

Where?

This GRACast will use a conference call for audio and WebEx to display the presentation slides. Each registration is allowed access via one phone line and one log in to the WebEx module. More than one person may participate per registration by using a shared computer screen and speaker phone. ...

This GRACast will use a conference call for audio and WebEx to display the presentation slides. Each registration is allowed access via one phone line and one log in to the WebEx module. More than one person may participate per registration by using a shared computer screen and speaker phone. GRA reserves the right to invoice those individuals and/or organizations that are logged in or connected from telephone numbers that don't correspond to a paid registration.

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