Temperature transient analysis in horizontal wells: Application workflow, problems and advantages

This article will present a set of analytical equations for the calculation of early-time, sandface temperature for the case of a slightly compressible fluid production. The equations provide the full, transienttemperature solution for the flow of low compressible fluids (i.e. liquids and, sometimes, gases) into horizontalwells. The solution is essential for temperaturetransientanalysis in smart wells—a monitoring approach of great potential, but in early development stage. A numerical simulation model will confirm the analytical equations as well as the multi-rate inflow test calculations.

The methods proposed here can be applied to a wide variety of well completion types, flow conditions and system properties. They form the basis for the flow rate allocation in multi-zone wells smart wells. The TTA workflow description will be provided, complemented by the real, smart well data analysis. A discussion on the calculation model's robustness based on the claimed sensor resolution is also provided.

The main value of the presented solution is that it is a valuable contribution towards a comprehensive temperaturetransientanalysis methodology and the associated benefits which will be especially important for efficient, real-time, intelligent well monitoring.