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根据重矿物百分含量分区、岩石碎屑组分特征、地层倾角测井特征等对潜江凹陷马王庙地区古近系新沟嘴组下段物源情况进行了分析。研究表明马王庙地区受到北东向的汉川和北西向的汉水两个方向物源影响。在此分析基础上,结合砂岩百分含量分布特征和沉积环境详细阐述了古近系新沟嘴组下段各个油组沉积时期不同物源的影响程度,认为马王庙地区新沟嘴组下段主要受东北部汉川方向物源的影响,西北部物源的影响次之,两物源影响交汇于马10井—马39井区附近。Ⅲ油组沉积时期研究区受到西北物源的影响较小;Ⅱ油组时期东北物源影响较前期增大,受西北部物源影响变化不大;Ⅰ油组时期仍以东北部物源影响为主,但其影响变小,而西北物源影响范围变大。
According to the classification of heavy mineral content, rock detritus and stratigraphic dip logging, the source of the Lower Paleogene of the Paleogene Xugouzui Formation in Mawangmiao area of Qianjiang sag is analyzed. The research shows that the Mawangmiao area is affected by the source materials in both directions to Hanchuan in the northeast and Hanshui in the northwest. On the basis of this analysis, the influence of different provenances during the deposition of various oil reservoirs in the Lower Paleogene of the Paleogene under the distribution characteristics of sandstone percentage and sedimentary environment is elaborated. It is concluded that the lower part of the Xingouzui Formation in the Mawangmiao- Affected by the source of Hanchuan direction in northeast China, the source of the northwestern China is secondarily affected, and the impact of the two provenances converges in the vicinity of Ma 10-Ma 39 well. The study area of Ⅲ oil group sedimentary period is less affected by the Northwest provenance; the influence of the source of the Northeast oil field in the Ⅱ oil group increased from the previous period, while the change of the source rocks in the Northwest China did not change much; Mainly, but its impact becomes smaller, while the scope of the Northwest source of influence becomes larger.