东营凹陷东辛油田河控三角洲河口坝构型界面层次建模研究

Hierarchical modeling of the channel mouth bar architectures in the river-dominated deltas in the Dongxin Oil Field, Dongying depression, Shandong

关键词:  东辛油田  河口坝  层次建模  变差函数

Key words:  Dongxin Oil Field  channel mouth bar  hierarchical modeling  variogram

摘要:

河口坝地下储层构型的分析及建模研究甚少,至今未能建立完整的3~5级界面层次模型,迫切需要建立一套完整的三角洲河口坝构型界面层次模型。为此,本文提出了分级控制下的界面识别与井间预测相结合的河口坝储层构型建模方法。结果显示,在人机互动的共同作用下,完整的河口坝模型可以为实际生产提供空间理论上的支持。研究区各构型单元不断向前推移,形成了明显前积的三角洲模式,河口坝增生体夹角范围为0.2°~3.43°,主物源方向延伸距离为1.64km,垂直物源方向为0.89km,整体上看,河口坝增生体呈席状分布、连续性好。这一研究不仅完善了河口坝地下储集体理论的研究,而且对提高油田开发效率具有重要意义。

Abstract:

The present paper presents a new hierarchical 3D modeling of the channel mouth bar sandstone reservoirs in the river-dominated deltas based on the boundary recognition and well spacing forecast. The results show that a complete channel mouth bar model may provide the spatial theoretical support for the actual production under the combined effects of human-computer interaction. The constant forward migration of individual architectural-elements resulted in the formulation of the progressive delta model for the study area. The third-order boundaries between the channel mouth bar accretionary sandstone bodies exhibit the angles ranging from 0. 2° to 3. 43°, extended distance of 1. 64 km for the principal source area, and vertical direction extending 0. 89 km. On the whole, the channel mouth bar accretionary sandstone bodies are laterally extensive, and display the sheet distribution. These results will not only improve the theoretical study of the channel mouth bar sandstone reservoirs, but also enhance petroleum exploration efficiency in the study area.