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莫索湾凸起是在石炭纪“基底”隆起的背景上发育起来的大型隆起构造,构造发育经历了六个阶段:石炭纪隆起雏形期;二叠纪隆起发育期;三叠纪—中侏罗世早期稳定埋藏期;中侏罗世晚期—晚侏罗世压扭改造期;白垩纪—古近纪稳定埋藏与调整时期;新近纪以来的隆起定型期。现今石炭系顶界面为一沿北西西向分布的特大型背斜构造,上覆二叠系—侏罗系为继承性披覆背斜,由下向上背斜面积和圈闭幅度逐渐变小,下侏罗统地层界面仅为低幅度背斜圈闭,侏罗系顶界面及其以上地层披覆背斜消失,整个莫索湾地区过渡为向南倾的单斜构造。石炭系古隆起在构造演化过程中没有遭受过破坏,石炭系顶背斜圈闭面积和闭合幅度呈逐渐增大趋势,古隆起主体部位由东南向西北方向逐渐迁移。莫索湾凸起构造演化特点有利于石炭—三叠系油气藏的形成与保存。因此,莫索湾凸起深层石炭—三叠系背斜圈闭,特别是石炭系特大型背斜圈闭具有十分重要的勘探价值。
The Mosoowan bulge is a large uplift structure developed on the background of the “basement” uplift of the Carboniferous. The structural development experienced six stages: the Carboniferous uplift, the Permian uplift, the Triassic - middle Jurassic Early Stages of Early Stable Burial; Middle Jurassic - Late Jurassic Warping; Cretaceous - Paleogene Stable Burial and Adjustment Periods; Uplift Prototyping since Neogene. At present, the top boundary of Carboniferous is an extra-large anticlinorium distributed along the NWW direction. The overlying Permian-Jurassic system is a succession of anticline, and the area and trapping area of the lower anticline are gradually decreasing. The Jurassic stratigraphic interface is only a low-amplitude anticline trap, the anticline of the Jurassic top interface and its upper strata disappear, and the entire Mosuowan area transitions to a south-dipping monocline structure. The Carboniferous paleohighs have not been damaged during the tectonic evolution. The closed area and closed amplitude of the anticlinal rings in the Carboniferous gradually increase, and the main parts of the paleohighs migrate gradually from southeast to northwest. The structural evolution of the Mosuo Bay uplift favors the formation and preservation of Carboniferous-Triassic reservoirs. Therefore, it is very important exploration value of the Mosoowan raised deep Carboniferous-Triassic anticline trap, especially the extra large Carboniferous anticline traps.