Several important issues about current oil and gas exploration in China

The gap between supply and demand for oil and gas is widening,yet exploration situation is severe in China.From the current situation of oil and gas exploration,this paper focuses on the analysis of global oil and gas exploration trend,current challenges of China's oil and gas exploration,basic problems of unconventional oil and gas exploration,as well as current oil and gas exploration theory and key issues.Global oil and gas exploration area is no longer limited by the degree of exploration,and gradually follows the trend of shifting to deep water,deep formation,unconventional,arctic area and other newly developed areas.China's key oil and gas bearing basins gradually enter the intensive oil and gas exploration,featuring that exploration depth increases,target reservoirs are more subtle,physical properties of reservoir are worse and technical difficulties of oil and gas exploration development engineering are gradually greater.Overseas oil and gas exploration development strategy of China's energy enterprises is faced with a number of challenges such as difficult block acquisition,political risk increase,higher requirements for exploration technology and so on.Geological theory and resource assessment of unconventional oil and gas and other core technologies require more researches.Borehole,fracturing and other key development technologies need to strengthen field test research.Under the guidance of new geological theory for oil and gas exploration,the paper highlights to explain 9 bottleneck problems,such as the whole process model of organic hydrocarbon generation,expulsion,migration and accumulation in the actual geological conditions,the evaluation on petroleum resource potential in the basins undergoing the tectonic transformation,pore throat structure and hydrocarbon percolation mechanism for the low permeability-tight reservoirs,hydrocarbon formation conditions and exploration direction of the large-size lithostratigraphic reservoir and continuous unconventional oil gas in China,and so on.