Analysis of a Logging Data Obtained While Oil Well Drilling and Feasibility Study of Fiber-Optic Sensors

P. R. Shiryaev, G. A. Tsvetkov

Abstract


Logging data obtained during oil well drilling were processed. Data were visualized and their correlation matrix was determined. The data types having the valuable correlation were identified. Linear regression model was defined and determination coefficient was estimated. The results of study showed that the data of deep, medium and shallow electromagnetic logging correlate with each other, but difference between some data types appeared significant. It was supposed that the difference in logging data may be caused by error in receiving and transmitting antennas angle turning. Feasibility of fiber-optics sensors for evaluation of resistivity of formation is shown. The article presents the brief review of the tools for measuring the formation electric resistivity while drilling using fiber-optic sensors. It is noted that using the fiber-optic sensors and correction of error of antennas turning angle may increase the drilling accuracy.


Keywords


logging; correlation matrix; fiber-optic sensors

References


KGS Digital wireline logs URL: http://www.kgs.ku.edu/Magellan/Logs/ (accessed 02.26.2016)

Patent US 6268911 B1 Monitoring of downhole parameters and tools utilizing fiber optics, 2001.

Patent US 20140176139 A1 Basalt Fiber Composite For Antenna In Well-Logging, 2014.

Patent US 7265649 B1 Flexible inductive resistivity device, 2007.

Patent US 6564833 B2 Rib-mounted logging-while-drilling (LWD) sensors, 2003.

Patent US 8664587 B2. Non-rotating logging-while-drilling neutron imaging tool, 2014.

Patent US 5852587 A. Method of and apparatus for sonic logging while drilling a borehole traversing an earth formation, 1998.

Tsvetkov G.A., Egorov M.A., Shiryaev P.R. 2014. Razrabotka tekhnologii, osnovannoy na primenenii volokonno-opticheskikh datchikov, dlya povysheniya kachestva bureniya skvazhin [Development of technology based on fiber-optics sensors application for increasing of well drilling accuracy. Karotazhnik. 10(244):94 – 100. (in Russian)

Shao Cai Rui, Cao Xian Jun., Zhang Fu Ming, Shumilov A.V. 2015. Karotazh v protsesse bureniya i tekhnologiya upravlyaemoy provodki naklonno napravlennykh i gorizontalnykh skvazhin [Logging while drilling and geosteering technology]. Geofisika. 5: 68 – 76. (in Russian)

Shiryaev P.R., Savich A.D., Tsvetkov G.A. 2015. Povyshenie tochnosti opredeleniya znacheniy udelnogo elektricheskogo soprotivleniya i uglov otnositelnogo naklona pri geonavigatsii [Increasing the accuracy of resistivity and relative dip angle measurements during geosteering]. Karotazhnik. 14(256):123 – 131. (in Russian)




DOI: http://dx.doi.org/10.17072/psu.geol.30.26

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