塔河油田奥陶系西南方向油气运移及充注

Hydrocarbon migration and charging of Ordovician from southwest in Tahe Oilfield

塔河油田奥陶系油气藏为以缝洞储集为主、多期充注成藏改造的复杂油气藏。近些年,随着西南部托甫台、跃参区块的油气突破,西南方向的油气运移和充注逐渐明确。原油物性、油田水I离子浓度和原油的地球化学分析均表明,除东部、南部和东南方向的油气运移外,塔河油田奥陶系还存在西南方向的油气运移及充注。这一发现扩大了塔河地区奥陶系的油气成果,为整体评价沙雅隆起南坡奥陶系油气藏奠定了基础。

Ordovician reservoirs in Tahe Oilfield are dominated by fracture and vug,and have experienced stages of hydrocarbon migration and accumulation. Recently,with the oil and gas breakthrough in Tuo Putai and Yuecan blocks,the migration and charging from the southwest is gradually clear and definite. According to the physical property of crude oil,iodide density in oil- field water and geochemical analysis of the oil,there also has hydrocarbon migration and charging from southwest in Ordovician of Tahe Oilfield besides the east,south and southeast direction. This find expands the oil and gas exploration of Ordovician,and lays a foundation for Ordovician overall evaluation in south of Shaya Uplift.