The Denver Well Logging Society (DWLS) is the Denver, Colorado Chapter of the Society of Petrophysicists & Well Log Analysts (SPWLA). The SPWLA is a nonprofit corporation dedicated to the advancement of the science of petrophysics, or formation evaluation, through well logging and other formation evaluation techniques and to the application of these techniques to the exploration of gas, oil and other minerals. Founded in 1959, SPWLA provides information services to scientists in the petroleum and mineral industries, serves as a voice of shared interests in our profession, plays a major role in strengthening petrophysical education, and strives to increase awareness of the role petrophysics. In the late summer of 1956, the Denver Well Logging Society was formed by a few Denver-area log analysts. The objective was to get to know each other socially and exchange technical ideas on well logging. The first members and founders included the following: Don Davis - In 1956 Don was with Schlumberger Well Services. Later he became a professor at Colorado School of Mines and also headed his own consulting company, Technical Log Analysts of Lakewood. He wrote letters of invitation to a no-host luncheon to explore the formation of a logging society. He was the first chairman and drafted the first set of by-laws for the organization. Jack Flynn - then with Sinclair Oil and Gas in Denver, later with Dresser-Atlas in Texas. Bob Colby - then with Sinclair Oil and Gas in Denver, later with Cities Service. Fred Miles - then with Gulf Oil. Fred was the first president of the DWLS. Bill Pugh - then with Lane-Wells, later president of his own company, Monaco Engineering Inc., in Denver. About four years after DWLS was established, it joined the newly formed SPWLA. The Bylaws had to be rewritten to comply. Elza Sanders and Rex Curtis were greatly instrumental in this work.