Multisensor Research Technologies of Oil Horizontal Wells on Fields of the Republic of Tatarstan

Abstract

In the Republic of Tatarstan the development widely involves hard-to-recover reserves of hydrocarbons, confined to low-permeable, heterogeneous and dissected reservoirs. Improvement of recovery efficiency of such reserves largely depends on the operational control system based on information about the filtration and thermal properties of the oil reservoir. Issues, related to the interpretation of geological field information, lead to incorrect mathematical problems in terms of Hadamard. The numerical solution of such problems requires the development of special methods. A mathematical model of thermohydrodynamic processes occurring in the ‘horizontal well’ system is constructed in the paper. Based on this model and regularization methods of A.N. Tikhonov, a computational algorithm is proposed for interpreting the results of thermohydrodynamic studies of horizontal wells and layers. Curves of the temperature changes are taken as the initial information, taken simultaneously by several deep instruments installed at different parts of the horizontal part of the wellbore. This approach makes it possible to evaluate the filtration parameters of an inhomogeneous reservoir and to construct an inflow profile along the trunk of a horizontal well.

Keywords

• horizontal well
• pressure
• temperature
• permeability
• multi-sensor technologies
• inverse task