Tatum Michael "Mike" Sheffield

July 28, 1957August 2, 2013

TATUM MICHAEL “MIKE” SHEFFIELD, age 56, of Missouri City Texas, passed away in an accident on August 2nd 2013, in Woodville, Texas. Mike was born in Port Arthur, Texas, to Ovon and Rufus Roberts Sheffield, on July 28, 1957. He studied for his Bachelors of Science in Geology at Lamar University, and then earned his Master’s Degree at the University of Texas El Paso. He was the beloved husband to his college love, Mary Dwyer Algermissen, and they married on June 20th 1981, in Albuquerque, New Mexico. Mike worked for Chevron/Texaco for over 30 years. He was known as a top-tier expert in the field of Geophysics with a number of published papers. His professional associations included the Society of Exploration Geophysicists and the American Association of Petroleum Geologists. Mike was the most loving caring father a family could know. Gentle, humble and self-sacrificing, he raised two boys into men. He not only taught his family how to live in the moments we are given, but how to truly love one another.

Mike was preceded in death by his father, Rufus Roberts Sheffield; his mother, Ovon Tatum Sheffield; and his father-in-law, Col (Ret) Robert L. Algermissen. Mike is survived by his wife of 32 years, Mary Dwyer Sheffield; his two sons, Charles Rufus Sheffield of Missouri City, TX, and Michael Robert Sheffield of Fort Worth, TX; sisters, Rose Spector and her husband James of Vidor, TX, Frances Simpson of Nederland, TX, and Robyn Baker and her husband Kenneth of Mansfield, TX Friends are invited to a visitation with the family from 6:00 PM to 8:00 PM, Thursday, August 8, 2013, at The Settegast-Kopf Co. @ Sugar Creek, 15015 Southwest Freeway, Sugar Land (Williams Trace Exit), with a Rosary to be recited at 7:00 PM. A Mass of Christian Burial will be held at 10:00 AM, Friday, August 9, 2013, at St. Laurence Catholic Church, 3100 Sweetwater Blvd., Sugar Land, with the Rev. Drew Wood, officiating. The Rite of Committal will follow at 11:00 AM, Saturday, August 10, 2013, at Campground Cemetery, in Woodville, TX.

Serving as pallbeaers will be Charles Sheffield, Michael Sheffield, Kenneth Baker, Kristopher Baker, Barton Payne, and James Spector II.

In lieu of flowers, donations in Mike’s memory may be made to the University of Saint Thomas, 3800 Montrose Blvd., Houston, TX 77006.


  • Visitation Thursday, August 8, 2013
  • Rosary Thursday, August 8, 2013
  • Funeral Service Friday, August 9, 2013
  • Interment Saturday, August 10, 2013

Tatum Michael "Mike" Sheffield

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Robert Brewer

January 28, 2016

I learned of Mike's passing recently and am very saddened. He was a great person, friend and colleague. He helped out my family and I after we moved from Denver to Houston in the early 1980's. My belated condolences to Mary and her sons.

Jason Sutton

January 30, 2014

A wondeful man, a great mentor of 3D geophysics and life. Thanks to you Mike for sharing the world of visualisation to inspire me onwards. Heaven's gain, our loss.

Lisa Goggin

August 21, 2013

I am at a loss for adequate words. Mike was a good friend, an inspiration at work, a mentor who unselfishly helped anyone who came to him and an outstanding leader in our office. He helped me to understand seismic attributes, collaborated with me on numerous occasions and shared his time and ideas for improving how we work, learn, and live. His easy laugh and ready smile were two constants at our office that I will miss greatly. I am so sorry for your loss. I hope you can find some comfort in knowing that he was and will always be respected for who he was and how he impacted those around him in a positive way.

Steve Moore

August 18, 2013

Mike made a huge difference on all his teams and projects, but what I absolutely favored most about him was his kind, gentle soul and smile.

David Angstadt

August 16, 2013

Even though he was only a year older than me he was an amazing mentor on the volume interpretation geophysical specialty . Just a really great guy and generous to a T with his time and knowledge, at work and in the rest of the world.

Jo Ann Bailey

August 10, 2013

I was privileged to be a part of Mike's Knowledge Management Team. His leadership will be missed by the whole team. My deepest sympathies to your family.

Nelda Carpenter

August 9, 2013

Know that all of you are in my thoughts and prayers as you grieve. May you be wrapped in God's comforting love.

Irma De Beer

August 9, 2013

I feel privileged to have worked with Mike over the past few years. My deepest sympathies go out to your family. I hope you can find comfort in knowing that the pain of your loss will subside and in its place you'll find memories of his kind and gentle spirit that will live on forever.

Mary Sue Purcell

August 8, 2013

Mike and I started work at Texaco down in Midland on the same day, and worked together in both Midland and Denver for many years. Mike was a fantastic geophysicist, and especially shined brightly on the Oklahoma-Arkoma Basin project during that time period. But more important to Mike than how well he was doing at work was how much his family meant to him. In those days, they were Mary, "Chaz," and "Mikey." I remember the happy and funny stories he used to tell about you guys, like the time one of the boys brought a hose and sprinkler into their family room in Aurora, and turned on the water - he wanted to see if he could turn the brown carpet to green like his Dad did with the lawn outside. Mary, Chuck, and Mike - your husband and father was a wonderful person, and I am saddened beyond words at his passing. Please take good care of yourselves. I am so sorry.

Nancy McCartney

August 8, 2013

Mary, Chaz & Mike - I am so very sorry for your loss! Although I have only known you all a short time compared to other folks in your lives, please know that I consider you all part of my extended family. Being with you all at family gatherings at Robyn & Ken's house, I always saw a family filled with love, compassion for others & a lot of fun to be with! Please know that you all, as well as the rest of the family are in my thoughts & prayers. God bless you all!