The authors sum up Gazprom Neft field experience in the area of long-term distributed temperature sensor (DTS) studies in horizontal wells. First steps in information capacity analysis were made on vertical multilayer well studies. Obtained results approved thermosimulator calculations and allowed to determine future conditions of representative studies in horizontal wells. The following periodical DTS measurements during multi-fracturing and 6 months stationary monitoring showed high information capacity of both stable and dynamic temperature field. The next steps in method effectivity enhancement are two be done in three directions: 1) DTS optimization, its components and price; 2) forming the best well run and stop conditions for measurements; 3) usage of advanced methods of interpretation and software.
Most urgent field task is DTS installation in horizontal well with ESP. Exact technology is not provided yet (ESP housing, Y-tool or composite fiber rod). Anyway for tie-in and reliable interpretation basic production logging studies will be conducted before DTS installation. In its turn obtained results of distributed acoustic sensing are still to be comprehended and may also find its place in production monitoring system.
References
1. Ipatov A.I., Kremenetskiy M.I., Kaeshkov I.S. et al., Undiscovered DTS potential
of horizontal well inflow profile monitoring (In Russ.), Neftyanoe khozyaystvo
= Oil Industry, 2014, no. 5, pp. 96-100.
2. Ipatov A.I., Kremenetskiy M.I., Gulyaev D.N. et al., Reservoir surveillance
when hard-to-recover reserves developing (In Russ.), Neftyanoe khozyaystvo
= Oil Industry, 2015, no. 9, pp. 68-72.
3. Patent no. 2541671 RF, Method for determination of flowing intervals in horizontal
wells, Inventors: Ipatov A.I., Kremenetskiy M.I ., Kaeshkov I.S.
