Since 2005 to 2010 JSC “Gradient” completed 126 projects with total area of 1133.5 sq. km.
The efficiency rate of the LFS technology amounted to 85.3%
95 wells were drilled by the Low-Frequency Seismic Sounding interpretation results. 81 wells have confirmed the forecasting. 28 wells produced hydrocarbons from the carbonate reservoirs, and 35 wells produced hydrocarbons from the terrigenous reservoirs.
Fig. 1. Number of projects and total area of surveys (2005-2010)
Efficiency of Low-Frequency Seismic Sounding (2005-2010)
Year |
Number of drilled wells |
Drilled oil-bearing horizons |
Number of wells which confirmed forecasting |
Average oil-saturated thickness acc. to well logging data, m |
Forecasting success rate, |
2005 |
38 |
Tulavian-Bobrikovian, Vereiskian, Bashkirian |
37 |
3.4 |
97.4 |
2006 |
14 |
Devonian, Tournaisian, Bobrokovian, Vereiskian-Bashkirian |
11 |
9.9 |
78.5 |
2007 |
29 |
Mid Devonian, Famennian, Tournaisian, Bobrokovian, Vereiskian-Bashkirian |
21 |
2.4 |
80.0 |
2008 |
5 |
Devonian, Famennian, Tournaisian, Bobrokovian, Vereiskian-Bashkirian |
4 |
3.6 |
80.0 |
2009 |
1 |
Bobrokovian |
1 |
- |
100.0 |
2010 |
8 |
Tournaisian, Upper Jurassic |
7 |
- |
87.5 |
TOTAL |
95 |
|
81 |
5.2 |
85.3 |