Reformed basins that are widely and numerously found in China are the main replacing areas for China's oil and gas exploration.Oil and gas generation

accumulation

migration

pool-forming and distribution in the reformed basins were controlled by both the tectonic framework of pre-basin stage and the tectonic movements and structural forms of post-basin stage.So oil and gas pool-forming processes were complicated and oil-gas distribution regularity was varied.The process or thinking for the researches and oil-gas assessment of the reformed basins includes:1.collating the attribution of the basin and analysing its dynamic circumstances;2.reverting to the original basin;3.revealing the reformation process of the basin;4.determining the reformation degree and classifying the basin's retention units;5.approaching the characteristics of oil and gas accumulation and dispersion

assessing resources amount;6.taking multi-source hydrocarbon into account;7.paying more attention to late-stage pool-forming;8.paying attention to differential reformation.