Paper: A Review Of Formation Characteristics and Completion Practices In The Olmos Sand Formation of South Texas

The Olmos Sand formation in South Texas presents many completion problems which vary considerably depending on geographic location. Almost always, massive stimulation is required to bring the sand to economic levels of production. Factors which must be considered to develop the best completion methods include mineralogy, lithology, temperature and frac gradients, permeability and porosity data, and the nature of the produced fluids. The paper also discusses the relative merits of different stimulation techniques used by the operators in the area and describes some effective methods of perforating, breaking down and fracturing the Olmos Sand.