蒙古林砾岩稠油油藏火驱配套举升工艺  

Artificial lifting approach for fireflood of the Menggulin conglomerate heavy oil reservoir

作　　者：王磊[1] 穆化巍 陈洪 刘媛 闫暄崎 闫雪 WANG Lei;MU Huawei;CHEN Hong;LIU Yuan;YAN Xuanqi;YAN Xue(Engineering Technology Department,PetroChina Huabei Oilfield Company,Renqiu 062552,Hebei,China;Development Department,PetroChina Huabei Oilfield Company,Renqiu 062552,Hebei,China;Research Institute of Engineering Technology,PetroChina Huabei Oilfield Company,Renqiu 062552,Hebei,China;Research Institute of Exploration and Development,PetroChina Huabei Oilfield Company,Renqiu 062552,Hebei,China)

机构地区：[1]中国石油华北油田分公司工程技术部 [2]中国石油华北油田分公司开发部 [3]中国石油华北油田分公司工程技术研究院 [4]中国石油华北油田分公司勘探开发研究院

出　　处：《石油钻采工艺》2023年第3期340-348,共9页Oil Drilling & Production Technology

基　　金：中国石油华北油田公司科研项目“蒙古林油田火驱提高波及程度监测工艺与方案优化”(编号:2022-HB-D16)。

摘　　要：为了解决蒙古林砾岩火驱油藏采油井出现的气锁、砂卡、管柱腐蚀等问题,进一步提高采油井的生产时率,提升火驱开发的生产效果,通过调研国内实施火驱油田的技术现状,进行了火驱举升工艺影响因素的分析,认为有杆泵采油依然是最合适的举升工艺。优化设计了专用防砂泵的结构,柱塞和泵筒的配合间隙为0.1 mm,并设计了独立的过砂沉砂通道,沉砂腔环空为8 mm,满足防砂需求;通过理论分析与实验相结合,确定了井下气液分离器的最优结构组合,采用螺距4 cm、二次沉降段20 cm,分离效率可达85%以上;进行了防腐蚀材料的优选,认为BG90-3Cr可实现抗腐蚀能力与经济性的兼顾。现场应用结果表明,优化后的举升工艺管柱兼具防砂、防气、防腐蚀的特点。截至2023年3月30日,M10-215井在高气液比情况下已连续稳定生产125 d,与同区块新钻采油井相比,生产时间延长了86 d以上,累计增油265 t,为后续火驱油藏的深度开发提供技术支持和指导。To deal with the gas lock,pump stuck by sands and pipe corrosion of production wells in the Menggulin conglomerate oil reservoir under fireflood and improve the production time efficiency of wells and fireflood performance,the fireflood practice in China was reviewed,and the factors affecting artificial lifting were investigated in the context of fireflood.It was concluded that sucker rod pumps are still the most applicable artificial lifting approach.The pump barrel structure of the specialized sand-resistant pump was optimized.The matching clearance between the piston and pump barrel was 0.1 mm,and an independent channel was designed for flowing and settling of sands,with the sand-settling chamber annulus of 8 mm,both in attempt to facilitate sand control of formation sands.Theoretical and experimental analyses were integrated to determine the optimal structural configuration of the downhole separator:a pitch of 4 cm and a secondary settling section length of 20 cm,associated with the separation efficiency exceeding 85%.The anti-corrosion materials were optimized,and the BG90-30Cr was considered cost-effective for corrosion prevention.The field application suggested that the optimized artificial lifting pipe string delivers integrated functions of sand control,gas control and anti-corrosion.As of March 30,2023,well M10-215 has been continuously and stably producing for 125 days under high gas-liquid ratio conditions.Compared with newly drilled and produced oil wells in the same block,the production time has been extended by more than 86 days,with a cumulative increase of 265 tons of oil.This provides technical support and guidance for the deep development of subsequent fire drive reservoirs.

关 键 词：蒙古林油田 砾岩稠油油藏 火驱 举升工艺 气液比 防砂泵 气液分离器 防腐 

分 类 号：TE343[石油与天然气工程—油气田开发工程]