复合储集层水平段砂泥岩预测方法  

Prediction method of sand and mudstone in horizontal section of composite reservoir

作　　者：崔国宏[1] 刘少峰[1] 刘广明[1] 李亚男[1] 马纪利 

机构地区：[1]中海油能源发展股份有限公司工程技术分公司

出　　处：《录井工程》2017年第2期46-49,共4页Mud Logging Engineering

摘　　要：水平井是一种增加井与油气层接触面积的有效手段,常规水平段一般是指轨迹在单层砂体穿行,通常使用的GEOsteer等地质建模系统,主要是针对常规单层水平段建模,保证水平段的储集层钻遇率,而渤海油田X区块属于半背斜层状油气藏储集层,采用同一水平段钻穿多层砂体联合开发的方式时,储集层钻遇率是制约单井产能的关键因素。为了实现对钻前储集层有效长度和地层倾角等的预测,在前人研究的基础上,基于将半背斜层状油气藏储集层特征与工程施工相结合的思路,通过对已钻井资料着陆段与水平段储集层砂泥岩配比的相关性研究,形成了复合储集层水平段砂泥岩长度预测公式,并在X区块成功应用,对油田开发具有积极意义。Horizontal well is an effective method to increase the contact area between well and hydrocarbon reservoir.Conventional horizontal sections generally refer to the trajectory passing through a single layer of sand body.Geological modeling systems such as GEOsteer are often used,they are mainly aimed at modeling the conventional single horizontalsection to guarantee reservoir-encountered rate in the horizontal sections.However,X block of Bohai Oilfield belongs to the semi-anticline layered reservoir,the method of unit exploitation was adopted by drilling through the multi-layer sand bodies in the same horizontal section,the reservoir-encountered rate is the key factor to restrict the productivity of single well.In order to predict the effective length and stratigraphic dip of the pre-drilling reservoirs,on the basis of the previous studies and the idea of combining the characteristics of semi-anticline layered reservoirs with engineering construction,and by studying drilling data of the correlation between sand and mudstone ratio of the landing section and the horizontal reservoir,the formula for predicting the length of sand and mudstone in the horizontal section of the composite reservoir was formed and successfully applied in X block.Its effect is ideal and it has positive significance for oilfield development.

关 键 词：半背斜层状油气藏 水平段 砂泥岩配比 储集层钻遇率 预测公式 

分 类 号：TE132.1[石油与天然气工程—油气勘探]