摘要
大17-70井区1气藏作为大牛地气田开发层系之一,其气藏动用程度低,剩余潜力大,并存在气藏描述、单砂体展布、剩余气认识不清等问题。论文通过研究山1-3储层沉积特征,精细刻画单砂体展布特征,建立三维地质模型。研究表明:1)大17-70井区山1-3亚段为三角洲平原沉积,发育分流河道、分流间湾微相,对应5种GR典型曲线,其中山1-3细分为山1-3-1、山1-3-2两期单砂体,山1-3-1层砂体发育一般,平均砂体厚度3.2 m;山1-3-2整体砂体发育较差,平均砂体厚度1.8 m;2)在单砂体、沉积相分析的基础上,建立三维地质模型,并分析高产井储层特征,通过优选划分山1-3有利区。对模型进行应用,通过新井水平段实钻轨迹验证模型,模型与实钻岩性符合率较高,可以为新井优化轨迹调整,指导投产方案制定。
As one of the development layers in the Da17-70 well block of the Daniudi gas field,the Shan1 layer has a low degree of gas reservoir utilization and large remaining potential.There are also problems such as unclear gas reservoir description,single sand body distribution,and remaining gas recognition.This study analyzed the sedimentary characteristics of the Shan1-3 reservoir,precisely depicted the distribution characteristics of single sand bodies,and established a three-dimensional geological model.The results show that:1)The Shan1-3 submember in the Da17-70 well area is a delta plain deposit with distributary channel and interdistributary bay microfacies,corresponding to five typical GR curves;Shan1-3 is subdivided into Shan1-3-1 and Shan1-3-2 single sand bodies.Shan1-3-1 sand bodies are generally developed with an average thickness of 3.2 m.The overall sand body development of Shan1-3-2 is poor,and the average sand body thickness is 1.8 m.2)Based on the analysis of individual sand bodies and sedimentary facies,a three-dimensional geological model is established and the characteristics of high-yield well reservoirs are analyzed,and the favorable areas of Shan1-3 through optimization are divided.The model is verified by the real drilling track of the horizontal section of the new well.The model has a high coincidence rate with the real drilling lithology,which can optimize the trajectory adjustment of the new well and guide the production plan.
作者
戴亚威
DAI Yawei(Sinopec North China Oil and Gas Branch,Zhengzhou 450000,China)
出处
《河北地质大学学报》
2025年第3期54-62,共9页
Journal of Hebei Geo University
关键词
大17-70井区
沉积相
沉积特征
单砂体
三维地质建模
Da17-70 well area
sedimentary facies
sedimentary characteristics
single sand body
three-dimensional geological modeling
