The project in the area of ​​shale oil was conducted for our client Ritek. The region of the Helium survey was the Galyanovskoye field, which is a developing field. It is known that the presence of commercial oil in the Galyanovskoye field is associated with compound reservoirs of Abalak and Bazhenov formations, from the Lower Jurassic. A initial daily flow of 17 m3 (through 4mm) was obtained from the initial production layer of the Jurassic in the well 39.

 

            The upper level of the production interval consists of black siliceous rocks and bituminous mudstones, and layers of dark-gray limestone, with the thickness varying from 1 to 6m, that means it has a mixed clastic-carbonate lithological composition (based on well data). The bottom level, under the description of the core, is represented by the alternation of clayey silt and silt-clay rhythmites, black siliceous rocks, and several types of carbonate rocks.

 

          The thickness of the Bazhenov-Abalak reservoir is stable enough and has between 25 and 35 m. The reservoir is controlled both ways by clay rocks of low permeability and has a complex character distribution due to the fracture propagation. In the process of water loss, the rocks are dissolved and leached. Seismic wasn`t effective in this region, so other methods were used, such as methane and ethane geochemistry. AGI’s results showed excellent correlation between Helium and oil, as highlighted on the table below.

 

          The map on the right and table below show the correlation between increased Helium flow and oil presence. The wells 2034, 2035 and 39 are inside the area with high Helium flow and have commercial production of oil.