风城地区油砂层分布规律及其控制因素

DISTRIBUTION LAWS AND CONTROLLING FACTORS OF OIL SANDS RESERVOIRS IN FENGCHENG AREA

风城油砂矿位于新疆准噶尔盆地西北缘克拉玛依市乌尔禾镇北北东方向12km处,是我国目前发现的最大的油砂矿。通过对该地区地层资料的统计及分析,并对白垩系进行了地层对比,将该区白垩系划分成了4个沉积时期,并对4个时期的油砂层进行了对比;同时还分析了侏罗系砂岩及油砂的分布特征,得出了油气主要沿断层和不整合面运移,并随运移距离的增加,油砂含油率降低的认识。通过研究初步掌握了该区油砂的分布规律及其控制因素。

Fengcheng oil sand mine,as the largest oil sand mine in China so far,is located in the place 12 km to the north-northeast of Wuerhe Town,Karamay City,northwest edge of the Junggar basin. Based on the analysis and statistics of the stratum data,this paper divided the Cretaceous stratum into four sedimentary periods and offered an analysis on the comparison among the oil sand formations in these four sedimentary periods. It analyzed the distribution characteristics of Jurassic sand and oil sand. The results show that the migration pathway is the fault and the unconformity surface in Fengcheng area. As the migrating distance increases,the oil content decreases. This paper helps researchers have a better understanding of the distribution laws and controlling factors of oil sand in this area.