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通过对研究区进行深入细致的沉积相及其展布分析,建立了研究区主要勘探目的层的沉积相模式,恢复了其沉积演化历史,预测了研究区生、储油有利相带。作者认为研究区第一排背斜带,尤其是齐古背斜以东的侏罗系及其以下地层中储集层发育,且埋藏相对较深,有利于以侏罗系低水位体系域砂岩作为储集层,以高水位体系域泥岩为盖层,以二叠系和侏罗系为烃源层的油藏的形成;第二排、第三排背斜带第三系河流相、三角洲相、滨浅湖相砂体发育,且有塔西河组和安集海河组泥岩作区域盖层,是第三系油气藏的发育区。
By analyzing the sedimentary facies and its distribution in the study area, the sedimentary facies pattern of the main exploration target layer in the study area was established, the sedimentary evolution history was restored, and the favorable facies belts of the study area were predicted. The authors believe that the first row of anticlines in the study area, especially in the Jurassic to the east of the Qiugou anticline and its subsequent strata, are well developed and buried relatively deep, which is favorable for the exploration of the Jurassic low-water system sands As reservoirs, the high -stand system tract mudstone is capped and the Permian and Jurassic hydrocarbon source reservoirs are formed. The second and third row of anticline Tertiary river facies, delta Facies, sand bodies along the shore and shallow lakes, and the Tashihe Formation and the Anjihahe Formation mudstone are the regional cap rocks, which are the developmental areas of the Tertiary reservoirs.