Assessment of the results of acid implosion stimulation of the near-wellbore area based on statistical data

International Conference on Innovations and Prospects of Development of Mining Machinery and Electrical Engineering 2018

矿业工程;电工学

Grezina, O.A.^1

Ufa State Petroleum Technological University, Branch of the University in the City of Oktyabrsky, 54a Devonskaya St., Oktyabrsky, Bashkortostan

452607, Russia^1

关键词: Carbonate reservoir;    Efficiency increase;    Geophysical properties;    Geostatistical modeling;    Geotechnical conditions;    Geotechnical parameters;    Hydrochloric acid treatment;    Multiple regressions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/194/8/082016/pdf
DOI  :  10.1088/1755-1315/194/8/082016

来源: IOP

【 摘 要 】

Assessment and planning of actions aimed at restoring and increasing well productivity are particularly important for objects in carbonate reservoirs. Consideration of the conditions of implementation allows to increase the efficiency. The paper summarizes the conditions and technological results of the highly efficient acid implosion stimulation (AIS) of the near-wellbore area of the oil wells of a specific production facility. The technology combines producing hydrochloric acid baths and using an implosion device that ensures repeated depression and impact stimulation. The method of multiple regression was used to determine the dependencies of the efficiency of the AIS on the geotechnical parameters that characterize the geophysical properties of a formation, the technological specifics of operation of the formation and the well, and the stimulation technology. Comparing the results of geostatistical modeling for the AIS and hydrochloric acid treatment allowed to identify the differences in the nature of the factors' impact on the results of applying these technologies. AIS efficiency increases along with the deterioration of geotechnical conditions of usage and repeated stimulation is possible on different stages of well operation. The nature of the connections between the conditions and the results of AIS implementation can be considered when selecting new objects of stimulation (wells, reservoirs) and determining the design of stimulation.