摘要
密井网条件下,基于两步法地质建模策略,综合应用地质、测井、录井、试井多尺度信息,从点-面-体的角度,对单砂体进行预测描述,考虑储层内泥岩隔层和砂体连通性、尖灭的分布,采用高斯序贯随机建模方法建立了单砂体骨架模型和单砂体物性空间分布模型,达到了密井网下多尺度信息解剖单砂体空间分布特征的目的。结合油藏数值模拟技术,在历史拟合的基础上,优化了肇源油田源121-3特低渗透油藏加密试验5套布井方案、4口水平井水平段长度及压裂半径,进而分析确定了合理的射孔方位和孔密,结果表明,试验区共布加密井51口,其中油井49口,水井2口,老井注采系统调整转注20口,水井转抽2口,形成线性井网,水平井水平段为400m、压裂规模半径为70m、在600射孔相位角附近、孔密为40-50孔/m之间时能获得最大产能。
Under the close well spacing condition,based on two-step geology modeling strategy,a comprehensive application of geology,the oil well logging,the logging,the well test multi-criterion information was made.From the point-face-body's angle,the single sand body is described for prediction.In light of the mudstone insulation and the granulated substance body connectivity,Gaussian sequential random method is used to establish a single sand body skeleton model and a single sand body space distribution model,and under the close well spacing,the multi-criterion information to dissect the spatial distribution characteristic of the single sand body was achived on the basis of the historical fitting and combination of reservoir simulation technology,5 sets of patterns of wells,the Yuan 121-3 of Zhaoyuan oil field with especially low permeability were optimized,as well as 4 horizontal wells,horizontal segment sizes and the compression fracture radius,and then the reasonable position of the perforation holes and close were determined.The results shown that in the pilot area there were altogether encryption wells 51,49 oil wells,2 water wells.The old injection systems were adjusted in 20 wells,2 wells were pumped to form a line Well-net,and the horizontal section of horizontal well was 400 meters,the compression fracture scale radius was 70 meters,nearby 60 degrees perforation phase angles and the hole close between 40 to 50 holes per meter the largest production capacity could be obtained at this time.
出处
《新疆石油天然气》
CAS
2009年第4期33-37,共5页
Xinjiang Oil & Gas
基金
黑龙江省科技攻关项目"水平井产能设计及指标预测方法研究"(GZ05A301)资助
关键词
单砂体建模
数值模拟
特低渗透油藏
水平井
调整
Single sand body modeling
Numerical simulation
reservoir with extremly low permeability
Horizontal well
Adjustment
