论文部分内容阅读
辽河西部凹陷中南部兴隆台-马圈子古潜山带沙三期沉积相主要受构造活动和古地貌所控制,从而使沉积相的展布具有分带性:近岸水下扇相主要分布在兴隆台潜山东部和南部的斜坡部位,西部为半深湖-深湖亚相,而潜山顶部为滨浅湖亚相。受潜山的阻挡,在潜山顶部地层厚度小,斜坡部位地层厚度大;砂岩厚度在潜山东侧较大,在潜山西侧较小;砂岩百分含量在潜山东侧较高,在潜山西侧较低。综合沉积相及砂体分布,提出了研究区浊积砂体的发育模式,结合已发现油气分布,指出了寻找浊积体岩性油气藏的有利勘探部位。
Sedimentary facies of the Xinglongtai-Mazao ancient buried hill in the central-western Liaohe western sag is mainly controlled by tectonic activity and palaeogeomorphology, which makes the distribution of sedimentary facies zonable. The submarine fan facies are mainly distributed in the Xinglongtai buried hill eastern and southern parts of the slope, the western semi-deep lake - deep lake subfacies, and the top of the buried hill shallow lake subfacies. Due to the blockage of the buried hill, the thickness of the stratum is small at the top of the buried hill and the stratum thickness is thick at the slope. The thickness of the sandstone is larger on the east side of the buried hill and smaller on the west side of the buried hill. The sandstone percentage is higher on the eastern side of the buried hill, Side is lower. Based on the distribution of sedimentary facies and sand body, the development model of turbidite sand body in the study area is put forward. Combining with the discovered oil and gas distribution, the favorable exploration site for finding turbidite lithologic reservoirs is pointed out.