鄂尔多斯盆地庆城油田页岩油水平井产能主控因素及开发对策优化  

Dominating factors on shale oil horizontal well productivity and development strategies optimization in Qingcheng Oilfield,Ordos Basin

作　　者：薛婷[1,2] 黄天镜[1,2] 成良丙[1,2] 麻书玮 时建超[1,2] XUE Ting;HUANG Tianjing;CHENG Liangbing;MA Shuwei;SHI Jianchao(National Engineering Laboratory for Exploration and Development of Low Permeability Oil&Gas Fields,Xi’an 710018,China;Exploration and Development Research Institute of PetroChina Changqing Oilfield Company,Xi’an 710018,China)

机构地区：[1]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [2]中国石油长庆油田分公司勘探开发研究院,陕西西安710018

出　　处：《天然气地球科学》2021年第12期1880-1888,共9页Natural Gas Geoscience

基　　金：国家科技重大专项“鄂尔多斯盆地致密油开发示范工程”(编号:2017ZX05069)资助.

摘　　要：受储层特征、水平段长度、压裂规模等多种地质因素和工程因素影响,庆城油田长7段页岩油体积压裂水平井单井产能存在较大差异,然而主控因素不明确。为此,以庆城油田180余口水平井为样本,采用灰色关联法、随机森林算法系统分析了地质、压裂施工等参数对产能的影响程度,明确单井产能的主控因素。研究表明:孔隙度、含油饱和度、脆性指数、有效水平段长度、压裂段数、单段加砂量、入地液量是影响页岩油水平井单井产能的主控因素。基于上述认识,优化了地质井位部署和压裂施工参数,对低油价背景下页岩油的高效开发具有较好的指导意义。Previous development practices in Chang 7 Member shale oil reservoir have proved that individual well production in Qingcheng Oilfield is related to several factors in both geology and engineering,such as physical properties of a reservoir,lateral length,fracturing scale etc.However,the most decisive factors among those are not clear.This paper is outlined to study the dominating factors relating to individual well production,based on geological parameters,fracturing construction data,and production data.Productivity influencing factors are quantitatively ordered using gray correlation analysis method and random forest algorithm.Research shows that the most decisive factors affecting individual well production of a horizontal well are porosity,oil saturation,brittleness index,effective lateral length,number of fracturing sections,sand volume pumped into a single fracturing section,and the amount of fracturing fluid pumped underground.Thus,well displacement,lateral length and fracturing parameters are optimized.This study provides a guidance to the development of shale oil reservoir considering low oil prices nowadays.

关 键 词：页岩油 水平井 产能主控因素 开发对策优化 

分 类 号：TE34[石油与天然气工程—油气田开发工程]