射孔孔道中携砂压裂液输送规律研究  

The study on transportation law of sand carrying fracturing fluid in perforation channel

作　　者：聂玲 张争[2] Nie Ling;Zhang Zheng(Three oil production plant of China Petroleum Chemical Co northwest oil field branch,Akesu 842012,China;Petroleum Engineering College,Xi’an Shiyou University,Xi’an 710065,China)

机构地区：[1]中国石油化工股份有限公司西北油田分公司采油三厂,新疆阿克苏842012 [2]西安石油大学石油工程学院,陕西西安710065

出　　处：《云南化工》2018年第2期15-16,共2页Yunnan Chemical Technology

基　　金：国家科技重大专项"低渗透致密砂岩气藏压裂裂缝及参数优化"项目成果(项目编号:2016ZX05050-009)

摘　　要：携砂压裂液自射孔孔道进入水力裂缝,其为裂缝和井筒连接的唯一通道,然而实际压裂施工中常会出现支撑剂颗粒沉降在孔道内而将射孔孔眼堵住,或者流经孔道后能量损失过多而严重影响支撑剂在裂缝内的输送。针对此类问题,文章基于自主设计的实验装置研究了支撑剂在射孔孔道内的输送规律。结果表明:射孔孔道内沉降的砂堤厚度随施工排量的增加而降低,随孔径的增加而减小;射孔孔道两端的压差随施工排量的增加而增加,随孔径的增加而减小。携砂压裂液在射孔管道中流动时存在形成砂堤的最小临界排量和砂堤消失的最大临界排量。Carrying sand fracturing fluid from the perforation hole into the hydraulic fracture,which is the only channel fracture and wellhole connected,but the actual fracturing proppant particles often occur in the channel and the settlement of perforation block,or through the hole after excessive energy loss and seriously affect the transport proppant in fractures.In view of such problems,this paper studies the transportation law of the proppant in the perforation channel based on the self designed experimental device.The results show that the thickness of sand dike settlement in perforation hole decreases with the increase of construction displacement,decreases with the increase of pore size,and the pressure difference at both ends of perforation hole increases with the increase of construction displacement,and decreases with the increase of pore size.The minimum critical displacement of sand embankment and the maximum critical displacement of sand breakwater disappear when the sand fracturing fluid flows in the perforated pipe.

关 键 词：射孔孔道 携砂压裂液 支撑剂 输送规律 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]