Geochemistry and hydrogeochemistry is the key of finding filled traps. “There’s no smoke without fire”
Using geochemistry, we find clues about hydrocarbons with two different ways;
1- Hydrogeochemical clues
-Connate waters (represents Marine sediments: Planctonic Lipid rich: Type 2 and Humic Kerogene Type 3: oil and gas) this type of waters are formed in old marine sediments actually Connate waters are syngenetic with sedimentation. This type of waters are immobile and staying stagnant so it is best place to accumulation of hydrocarbons.
-Mixing waters (represents Terrestrial Sediments: Algal Sapropelic kerogene: Type 1: oil) :mixing waters are transitional form between meteoric and connate waters. this type of waters represents terrestrial washing and sometimes they are suitable for existance of hydrocarbons. Also mixing waters are the clue for connate water for exploration geologists
2- Surface geochemistry clues
-Taking anomalies from field, positive and negative anomalies of some surface gasses are best clues of hydrocarbons they named as microseepages
-Macroseepages are oil or gas which vertically rising through a fault or any deformation zone from reservoirs to the surface.
Combination of two methods are brings us a filled reservoir. Only hydrogeochemical explorations reduce costs by 50 percent of exploration phase of findig oil and gas
Most of this methods are firstly used by Russians and developed by American geologists. For now, Turkish geologist Orkun is using it 😀