SUMARY

Application of gas geochemical method for the gas hydrate investigation in Việt Nam

Phạm Thị Nga, Nguyễn Duy Duyến,Trình Văn Thư

Gas geochemistry is one of the most advanced and efficient method in the world, it is currently applied in investigation, exploration and resource assessment for gas hydrate. The basis of the method is gas molecule migration in accumulaiion containing gas hydrate of the external environment and its chemical-physical interaction with the nearby environment, and decline in gas concentration forming anomalous concentrations of Cl^-, SO₄^2-... Based on the variation or these gas and ions, we can identify forming regions of gas hydrate in deep sediments.

Based on the results of sample analysis taken from gravity discharge tube in the southeast Vũng Tàu of 140 survey stations. A number of locations in this region has identified showing signs of methane escape, this is ilie sign of hydrate gas discovery. This result is the basis finding for gas hydrate surveys in other continental shelf of Việt Nam as well as detailed researches in the next stage.

Người biên tập: TS. Vũ Lê Tú.