贝尔凹陷贝西斜坡带油藏主控因素

Reservoir Master Controlling Factors of Beixi Slope Zone in Beier Sag

贝西斜坡带构造位置有利,成藏条件优越,油气富集,已经成为近几年贝尔凹陷乃至海拉尔盆地勘探热点,是规模增储的现实领域。通过对斜坡带油藏主控因素和成藏规律的分析认为,斜坡带主要发育构造及构造-岩性油藏,局部发育岩性油藏,具有平面分带、纵向多层位的分布特点,斜坡带中、下带反向断层控制形成的构造高点油气最为富集。总体上,贝西斜坡带体现了洼槽控油、相带控储、构造控藏的油气聚集模式。以此建立了贝西斜坡带油气成藏模式,有效地指导了贝70、贝66等井区的新突破。

Beixi slope zone in Beier Sag has favorable structural position, advantageous accμmulation eonditions , and enriched resourees, has become the exploration hotspot in Beier Sag and even Hailar Basin, been a reality field inereasing reserves of scale in recent years. The analysis of the slope zone with reservoir master factors and forming rules indicates that mainly develops structural or strueture--lithology reservoir, locally lithology reservoir, has distributed characteristics of the plane zonation and longitudinal multilayer bit, discovered enriehed resources in struetural highs formed by reverse faults. Overall ,the zone shows that sub- sag controls the oil, facies belts control reservoir distribution, structure controls re- sources enrichment. Accordingly,the accumulation mode of Beixi Slope has been built and effectively guid- ed new breakthroughs in Bei70 and Bei66 well areas etc.