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塔北西部玉东地区奥陶系未获得油气突破。对该区油气成藏条件认识不明确,其勘探潜力不落实。通过对玉东地区构造、成藏演化分析,明确了鹰山组碳酸盐岩岩溶储集体在晚海西期形成准层状古油藏,后期的构造抬升仅造成构造高点油藏破坏,对分布于围斜部位缝洞型油藏影响不大。通过对源岩条件、储盖组合及圈闭条件等成藏因素综合评价,估算了奥陶系碳酸盐岩的油气勘探潜力,明确玉东地区是塔里木盆地重要的油气战略接替区。
Ordovician in the eastern Yuda region of northern Tarim Basin did not get a breakthrough in oil and gas. The understanding of hydrocarbon accumulation conditions in this area is not clear, and its exploration potential is not fulfilled. Based on the analysis of tectonic and reservoir-forming evolution in Yudong area, it is clear that carbonate rocks karst reservoirs in Yingshan Formation formed quasi-stratiform paleo-reservoirs during the late Hercynian period and tectonic uplift in the later period only resulted in the destruction of high-tectonic reservoirs, There is little effect on the fractured-hole reservoirs located in the bends. Based on the comprehensive evaluation of reservoir factors such as source rock conditions, reservoir-cap assemblage and trapping conditions, the potential of oil and gas exploration for Ordovician carbonate rocks is estimated. It is clarified that Jadeung region is an important oil and gas strategy succession zone in the Tarim Basin.