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F开发区厚油层BⅠ323单元为三角洲分流平原高弯度曲流河沉积。随着井网的加密以及沉积认识的不断加深,发现砂体平面分布复杂。在重新细分对比的基础上,对该区BⅠ323单元砂体发育特征进行了深入研究。受到古地势的影响,BⅠ323单元砂体存在3个方面的差异性:一是超覆型;二是“残留岛”型;三是BⅠ323单元砂体与BⅠ32单元砂体叠加方式存在差异。
Unit B 131 in the thick oil zone of F Development Zone is a high crooked meandering river sediment in delta distributary plain. With the continuous improvement of well patterning and sedimentary understanding, it is found that the distribution of sand bodies is complex. Based on the subdivision and contrast, the developmental characteristics of sandbodies of Unit B323 in this area were further studied. Affected by the paleo-terrain, there are three differences in BⅠ323 unit sand bodies: one is overburden type; the other is “residual island” type; third, there is a difference in superposition mode between BⅠ323 unit sand body and BⅠ32 unit sand body.