碳酸盐岩沉积演化模式与沉积相分布——以鲁卜哈利盆地东北部上白垩统Mishrif组为例

卞从胜,李永新,吕明胜,刘刚,段海岗,罗贝维,黄擎宇,张静,杨沛广,张新顺,宋金民,黄理力

Sedimentary evolution model and sedimentary facies distribution of carbonate rocks： Case study of Mishrif Formation in northeast Rub Khali Basin

Congsheng BIAN,Yongxin LI,Mingsheng LÜ,Gang LIU,Haigang DUAN,Beiwei LUO,Qingyu HUANG,Jing ZHANG,Peiguang YANG,Xinshun ZHANG,Jinmin SONG,Lili HUANG

图6 研究区南部近东西向Mishrif组地震层序地层格架、边界特征与沉积物叠加样式 注：红色与粉色虚线箭头代表高位域进积或加积体，蓝色箭头代表海侵域超覆体；其中粉色箭头表示大型丘状弱反射，经钻遇W-4井分析为礁滩复合体，具有多期进积或者加积特征；红色箭头属于小型丘状中弱反射，属颗粒滩沉积。W-4井Mishrif组下部断层与中部右侧15 km处断层的左侧为厚层礁滩复合体，右侧地层厚度突然减薄，代表镶边型台地边缘沉积；W-4井Mishrif组上部发育礁滩复合体，右侧不发育断层，但地层向右缓慢减薄，代表缓坡沉积，W-4井处及左侧为浅缓坡，右侧向海方向厚度减薄为中缓坡

Fig.6 Seismic sequence stratigraphic framework， boundary characteristics and sediment overlay pattern of the early east-west Mishrif Formation in the southern part of the study area