Petroleum geological conditions in Dailekh area, western Nepal

It is of great significance to analyze the petroleum geological conditions of Nepal to promote the exploration and development of oil and gas in Nepal. Basing on comprehensive collections of geological data related to oiland gasin Nepal, combining with field investigation and a number of sample analysis results, this paper reports the regional geology, oil and gas exploration status, regional structural characteristics and stratigraphic developments in Nepal, and analyzes oil and gas seeps, source conditions, source reservoir caps and oil and gas trap conditions exposed in Dailekh area. It is concluded that:(1) there are four sets of hydrocarbon sources in Dailekh area;(2) a number of source reservoir cap assemblages are with potential exploration prospects for oil and gas; (3)the oil and gas seeps are the products of the cracking of highly matured source rocks, which probably came from the sedimentary strata under the metamorphic nappe; (4) the anticlines, protruding structures and inclined fault blocks related to faults and thrusts are important structures for oil and gas exploration.