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以高分辨率层序地层学理论为指导,根据可容空间(A)与沉积供给(S)比值的测井响应特征,结合沉积特征、沉积微相以及旋回对称性的变化,利用测井曲线叠加样式,确定短期基准面旋回测井响应特征和体系域内沉积物体积分配。研究结果表明,白音查干凹陷腾格尔组短期基准面旋回分为向上“变深”的非对称型(A型)、向上“变浅”的非对称型(B型)以及向上“变深”再“变浅”的对称型(C型)3种主要类型。再依据低可容空间和高可容空间特点,将A型划分为A1和A2两种类型;将B型划分为B1和B2;依据上升半旋回和下降半旋回的对称性,将C型划分为完全–近完全对称型(C1型)、以上升半旋回为主的不完全对称型(C2型)以及以下降半旋回为主的不完全对称型(C3型)等7种次级短期基准面旋回类型。
Guided by the theory of high-resolution sequence stratigraphy, according to the log response characteristics of the ratio of allowable space (A) to sediment supply (S), combined with the changes of sedimentary facies, sedimentary microfacies and gyration symmetry, Overlap patterns to determine the response characteristics of the short-term base-level cycle log and sediment volume allocation within the system tract. The results show that the short-term base-level cycles in the Tenggeer Formation in the Baiyinchagan Sag are divided into asymmetric (A) up “deepened ” and asymmetric (B) up And three types of symmetry (C type) upward from “deepening” and then “shallowing out”. According to the characteristics of low-capacity space and high-capacity space, the A type is divided into two types of A1 and A2, the B type is divided into B1 and B2, and the C type is divided according to the symmetry of rising half-cycle and descending half cycle Seven kinds of secondary short-term benchmarks such as complete and near perfect symmetry (C1), incomplete symmetry (mainly C2) with ascending hemi-gyration and incomplete symmetry (C3) Surface spin type.