FIELD TEST RESEARCH ON DILATATION DECONSOLIDATION WELL STIMULATION

This paper detailed the field operation process and application effects of Dilatation Looseness Stimulation for wells. In the operation process design of this technology, the calculation of explosive application and ignition delay is based on the test results of rock matrix dynamic mechanical parameters, especially the ζ value of oil bearing formation when dilatation being produced. A method that combines theory and practice is used to illustrate the relationship among the fracturing explosive body design, installation of the explosive body in use, ignition technology and operation processes. It also gives an approach to evaluate the operation being successful or not. The damage prevention of casing and protection problems are discussed and analyzed. Finally, case studies of well 4207 which is an open-hole and well 4242 which is a cased hole in Zichang lease are provided, the effects of the field test and the geological effect for Dilatation Looseness Stimulation are also analyzed.