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Tuesday 10 December 2019
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Horizontal Well Hydraulics: Part 1
Predicting Production Rates of Horizontal Wells
and Radial Collector Wells


Learn to predict the production rate and radius of influence of a horizontal well or a radial collector well.

Well hydraulics for horizontal wells is considerably more complicated than for vertical wells. The flow patterns near horizontal wells are three-dimensional, while the flow toward vertical wells may be reasonably approximated as two-dimensional flow in the horizontal plane.

Analytic solutions for horizontal wells are limited, while three-dimensional numerical models are cumbersome in view of the high degree of grid resolution required near the horizontal well or laterals of the radial collector well.

Groundwater development in shallow aquifers, where vertical wells are less productive, is increasingly accomplished by horizontal wells as drilling techniques of these wells have improved. In the drinking water industry horizontal wells in the form of radial collector wells are increasingly used near or even with their "laterals" underneath surface water bodies to enhance production and limit treatment when compared to the direct pumping of that surface water (riverbank filtration).

This webinar focuses on predicting production rates of horizontal wells and radial collector wells. We do so using simple two methods: (a) calculator estimates and (b) two-dimensional models and incorporating the resistance to the converging (3D) flow near the laterals.

This approximate technique is even possible when laterals extend underneath surface water bodies. We will see that the predicted production rates are within a few percent of those derived from fully three-dimensional models.


Radial Collector Wells Vertical Flow Net
Bakker et al. 2005 in Groundwater


Webinar Topics:

  • Start with the basic solution for ground water flow toward a horizontal drain.
  • Step-wise procedure to convert a solution from a drain to a horizontal well.
  • Developing a two-dimensional model for a radial collector well with multiple laterals.

Take-A-Aways from this webinar:

  • Learn when 3D flow effects are important.
  • Learn how to predict the production rate of horizontal wells.
  • Learn how to predict the production rate of radial collector wells.
  • Learn strategies to delineate "wellhead protection areas" for horizontal wells or radial collector wells.


Schedule: Tuesday, December 10, 2019
11am (Pacific)
12 noon (Mountain)
1pm (Central)
2pm (Eastern)

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Fee: $170.00 USD Per Computer Site*

* Member Pricing when you register for Parts 1 and 2 of this Series

(discount is applied during checkout when both parts are in your cart)

One webinar (non-member): $299.00 USD

One webinar (member): $249.00 USD

Pay one site registration fee and an unlimited number of participants from your organization can attend at that site.

Instructor: Henk Haitjema, PhD
Handouts: Copy of Webinar Slides (pdf)
Record of Attendance Form (pdf)
Duration: 1.5 hour plus Q&A
(no restrictions on time limit for extra Q&A!)
Professional
Development:
Earn 1.5 Professional Development Hours (1.5 PDH)

A Record of Attendance Form is included free with each webinar for your record keeping and individual PDH verification. We ask your on-site coordinator to return the completed and signed copy of the Form to us following the webinar for (1) maintaining a separate copy as a service to attendees and (2) forwarding to NIU confirming attendance for those who order certificates.

Attendees may also order an official a Course Completion Certificate from Northern Illinois University for a small administrative fee. The Certificate is optional and may be ordered separately following the webinar to confirm your attendance and showcase the certificate on your office wall. Instructions for ordering certificates are given during the webinar.


* This webinar is eligible for the 'BUY THREE, GET THREE' discount; however ANY webinar series discount shown above cannot be combined with it.

Attendees will be invited to actively participate during this live and interactive on-line web seminar. Discussion is planned following the webinar for those who want to continue the session. Bring your questions to the webinar and present them to the instructor and other participants for exploring the best solution.


Instructors Bio

Henk Haitjema, PhD

Henk Haitjema, PhD is the Editor-in-Chief of NGWA's Groundwater. He is also Professor Emeritus at Indiana University where he taught groundwater flow modeling and applied mathematics at the School of Public and Environmental Affairs.

He is internationally recognized for his mathematical modeling of groundwater flow. He is the author of the popular groundwater model "GFLOW" (since 1994) and a book "Analytic Element Modeling of Groundwater Flow" (Academic Press, 1995).

Dr. Haitjema received his Masters degree in Civil Engineering from the Technical University of Delft, The Netherlands (1976) and his Ph.D. in Civil Engineering from the University of Minnesota (1982).



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