when did the oil boom take place?
1901
Texas oil boom
 Nevertheless, most historians consider the Spindletop strike of 1901, at the time the world's most productive petroleum well ever found, to be the beginning point. This single discovery began a rapid pattern of change in Texas and brought worldwide attention to the state.

where is the most oil found in texas Permian Basin in West Texas
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Texas oil boom [SEP] Timeframe
Many small towns, such as Wortham, which had become boomtowns during the 1920s saw their booms end in the late 1920s and early 1930s as their local economies collapsed, resulting from their dependence on relatively limited petroleum reservoirs. As production peaked in some of these smaller fields and the Great Depression lowered demand, investors fled. In the major refining and manufacturing centers such as Beaumont, Houston, and Dallas, the boom continued to varying degrees until the end of World War II. By the end of the war, the economies of the major urban areas of the state had matured. Though Texas continued to prosper and grow, the extreme growth patterns and dramatic socioeconomic changes of the earlier years largely subsided as the cities settled into more sustainable patterns of growth.