摘要
Abstract
By synthetically using the core analyzing results of Well L11-6, log curves and their processing results etc. , the author believes that the interlayer types are mainly clay and calcium in the delta front sand body, followed by a transitional sandwich, and establishes the standards of identifying the electrical and reservoir properties of various types of interlayers. Second, the author analyzes the interlayer distribution of underwater distributary channels and estuary dam sand bodies in the delta front subfacies considering the microfacies distribution and taking full advantage of the dense well system in the exploitation section. The author believes that the main types of interlayers are clay layer and calcareous interbeds in the underwater distributary channel, their lateral distribution is unstable, and the dip angle is less than 2° in a general way. The rock type, thickness and lateral distribution of the interlayer are different in dissimilar locations of the estuary dam. There are mainly clay interlayers in the main location of the estuary dam, with small thickness and poor stability of lateral distribution, and ＜ 1. 5° dip angle in a general way. There are transitional interlayers and calcareous interbeds on the edge and the flank of the estuary dam, with larger thickness and lateral stability, and ＜ 1. 0° dip angle in a general way. The samdwiches are not well developed in the distributary channel sand body. There is only a small number of calcareous interbeds in the small-scale straight channel sand. In the large-scale curving channel sand, there are clay interlayers on the flank of channel sands, and calcareous interlayers in the middle of the channel sands.关键词
三角洲前缘亚相/水下分流河道/河口坝/夹层/分布模式Key words
delta front subfacies/ underwater distributary channel/ estuary dam/ interlayer/distribution pattern分类
能源科技
