Using of Ordinary Kriging for Indicator Variable Mapping (example of sandstone/marl border) (CROSBI ID 555179)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Novak Zelenika, Kristina ; Malvić, Tomislav
hrvatski
Using of Ordinary Kriging for Indicator Variable Mapping (example of sandstone/marl border)
There is plenty of opportunity to work with indicator variable in the petroleum geology. It means that each task where we can define two possible results (binary approach), the most often expressed as 1 (true) and 0 (false), can be finally presented as indicator value. Furthermore, the reservoir facies analysis is just one of such problem that could be very good analyzed with such tool. In the Croatian part of the Pannonian basin system, the majority of reservoirs are presented by sandstones, that gradually have been changed in marls laterally as well as towards the top and the base of the reservoir. The analytical goal in this paper was lateral facies change, i.e. the mapping of contour of permeable reservoir part. We used the well data to define indicator variable presented as 1 for reservoir described by sandstone, and with 0 for the reservoir in dominantly marl type or pure, basinal marl. Hand-counting (very popular in the past) put the facies transition line as the half of distance between 1 and 0 values. But, today’ s approach is obligatory based on the computer mapping. It is why we tried to use advanced technique of Ordinary Kriging to interpolate indicator values, trying to reach approximately ‘ half-distance’ facies line. The successfully results are presented in this paper.
ordinary kriging; indicator variable; sandstone; marl; facies transition
nije evidentirano
engleski
Using of Ordinary Kriging for Indicator Variable Mapping (example of sandstone/marl border)
There is plenty of opportunity to work with indicator variable in the petroleum geology. It means that each task where we can define two possible results (binary approach), the most often expressed as 1 (true) and 0 (false), can be finally presented as indicator value. Furthermore, the reservoir facies analysis is just one of such problem that could be very good analyzed with such tool. In the Croatian part of the Pannonian basin system, the majority of reservoirs are presented by sandstones, that gradually have been changed in marls laterally as well as towards the top and the base of the reservoir. The analytical goal in this paper was lateral facies change, i.e. the mapping of contour of permeable reservoir part. We used the well data to define indicator variable presented as 1 for reservoir described by sandstone, and with 0 for the reservoir in dominantly marl type or pure, basinal marl. Hand-counting (very popular in the past) put the facies transition line as the half of distance between 1 and 0 values. But, today’ s approach is obligatory based on the computer mapping. It is why we tried to use advanced technique of Ordinary Kriging to interpolate indicator values, trying to reach approximately ‘ half-distance’ facies line. The successfully results are presented in this paper.
ordinary kriging; indicator variable; sandstone; marl; facies transition
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o prilogu
40-41.
2009.
objavljeno
Podaci o matičnoj publikaciji
Podaci o skupu
Internatonal Oil and Gas conference (5 ; 2009)
poster
29.09.2009-01.10.2009
Šibenik, Hrvatska