锦99块杜家台油层层序构型及其沉积演化

Sequence configuration and sedimentary evolution of Jin 99, Dujiatai Formation

王燕¹ 杨少春² 温静³ 兰志勤² 张瑞香²

中国石化胜利油田分公司河口采油厂，山东 东营 257200 中国石油大学（华东）地球科学与技术学院，山东 青岛 266580 中国石油辽河油田分公司，辽宁 盘锦 124010

Hekou Oil Production Plant, Shengli Oilfield Company, SINOPEC, Dongying 257200, China School of Geosciences, China University of Petroleum, Qingdao 266580, China Liaohe Oilfield Company, PetroChina, Panjin 124010, China

辽河油田锦99块杜家台油层Ⅰ油组发育典型的扇三角洲前缘沉积。文中以该油组的3砂层组为例，综合运用高分辨率层序地层学和储层构型理论，对基准面变化与沉积演化特征，特别是基准面变化、产状和发育程度进行了深入研究。结果认为：Ⅰ3砂层组发育2个中期基准面旋回，4个短期基准面旋回和7个超短期基准面旋回；基准面旋回类型包括对称型和非对称型，其中，非对称型可以细分成向上变深和向上变浅的非对称型，而对称型也可以细分成以上升半旋回为主的不完全对称型和上升与下降半旋回近似相等的对称型。基准面类型划分为泥质、物性和钙质界面，基准面高时，可容空间较大，河道宽度窄，平面上呈条带状。基准面低时，河道宽度大，平面上呈连片状分布。

TheⅠoil group of Dujiatai reservoir in Block Jin 99 of Liaohe Oilfield is typical of fan-delta front deposits. Based on the high resolution sequence stratigraphy and the reservoir architecture theory, the base-level change and the sedimentary evolution, especially the base-level change, the development degrees and the occurrence of the third sand group of Ⅰoil group were hierarchically characterized. The results show that the third sand group could be subdivided into two mid-term base-level cycles, four short-term base?-level cycles and seven ultra-short term base-level cycles; the types of the base-level cycles are symmetry and asymmetry, the asymmetry types are divided into upward-deepening and upward-shallowing asymmetries, symmetry types are divided into incomplete symmetry dominated by uprising and nearly complete symmetry. The base-level is divided into three categories: muddy boundary, physical property boundary and calcareous boundary. When the base?-level is high, the accommodation space is large and the channel is narrow, horizontal distribution is dominated by banded channel. When the base-level is low and the channel is wide, flaky sand body is the main horizontal distribution.

10.6056/dkyqt201601003