Multi-Sensor Technologies for Horizontal Well Production Logging. Current Status and Application Experience in the Fields of Russia

Abstract

Overview of modern well logging methods for research of operating horizontal wells was completed. The possibilities of practical problems solving with the use of application of distributed measurement systems in a horizontal wellbore. Need for mandatory combination of the results of production well logging with mathematical modeling of thermohydrodynamic processes when preparing the final summary was noted. The material contains an examples of production well logging data. Due to the wide spread of horizontal drilling there are in the global well logging practice areas of work focused on the study operating horizontal wells using multi-sensor technology formed and rapidly developing. Direction of technology development are defined ways of getting information in operating horizontal wells and here are the following ways: Use the remote (or autonomous) downhole tools with distributed across the stream sensors of composition, velocity and temperature moved along the axis of the horizontal section of the well, "scanning" flows under different regimes;Use of several autonomous devices wich are delivered to the fixed depth in the horizontal section of the well with a change in mode of well operation;Use of fiber optic measurement systems, distributed along the length of the horizontal wellbore with the possibility of "instantaneous" temperature record for the entire length of the cable as in monitoring mode, and the mode transients. As additional parameter the bottomhole pressure, and in the future, the acoustic noise distribution is recorded. The choice of production logging technology depends on the task, geological conditions of the deposit and technical equipment of contractors. Thus, none of the above methods for studying the horizontal wellbore does not exclude the possibility of other approaches, and the areas of effecient use of non-overlapping. Thus, each of the directions of development of research operating horizontal wells technology has its niche, not limiting the development of existing and newly developed technology solutions. In this case, all methods of horizontal well research combine the need to scan the flow parameters using a plurality of separate (distributed) sensors spaced or transported to a horizontal well.