先期防砂筛管顶部固井一体化技术  

Integrated technology of pre-completion sand control and screen top up cementing

作　　者：田晓勇 张京华 白云飞 蒋本强 蒋立坤 宋剑鸣 苟旭东 古青 TIAN Xiaoyong;ZHANG Jinghua;BAI Yunfei;JIANG Benqiang;JIANG Likun;SONG Jianming;GOU Xudong;GU Qing(Engineering Technology Research Institute,BHDC,Renqiu 062252,Hebei,China;The Fourth Exploit Factory,Huabei Oilfield Company,Langfang 065000,Hebei,China)

机构地区：[1]渤海钻探工程公司工程技术研究院,河北省任丘市062552 [2]华北油田公司第四采油厂

出　　处：《石油钻采工艺》2023年第5期575-580,586,共7页Oil Drilling & Production Technology

摘　　要：巴彦油田LH等区块储层出砂严重,井壁稳定性差,井径扩大率大,次生腐蚀介质,局部膏岩对筛管挤压强度高,现有筛管顶部注水泥技术无法满足油田长期开发的需求,为此,进行了先期防砂与筛管顶部固井相结合的一体化技术研究。通过优选高性能等离子割缝筛管,配套筛管外封隔器,实现对稳定性差、易出砂的储层段的先期防砂和封堵;优选叠加交错式金属钢带骨架结构,改进了高扩张比封隔器保护套,可以实现井径扩大率15%情况下的有效封隔;对压差式分级箍进行碳化钨喷涂处理,提高其抗冲蚀性能,确保分级箍可靠关闭。3口井的现场试验结果表明,采用先期防砂固完井一体化施工,储层疏松砂岩及局部泥岩封堵有效,未见明显出砂、垮塌及筛管失效,扩径井段封隔效果可靠,水泥浆未发生窜流,分级箍关闭后未出现密封失效问题,有效解决了该区块固井与防砂难题。The reservoirs in LH and other blocks of Bayan Oilfield suffer from severe sand production,poor wellbore stability,high wellbore enlargement rate,secondary corrosive media,and high compression strength of the screen tube by local gypsum.The existing screen top up cementing technology cannot meet the long-term development needs of the oilfield.Therefore,an integrated technology combining pre-completion sand control and screen top up cementing was studied.By selecting high-performance plasma slotted screen tubes and matching them with external packers,pre-completion sand control and plugging-off of problem reservoir intervals with poor stability could be achieved.The optimized overlapping metal steel strip skeleton structure has been improved with a high expansion ratio packer protective sleeve,which can achieve effective plugging-off at a wellbore expansion rate of 15%.Tungsten carbide coating is applied to the differential pressure stage collar to improve its erosion resistance and ensure reliable closure of the stage collar.The field application in three wells shows that the combined job of pre-completion sand control and well cementing is effective in plugging loose sandstone and local mudstone in the reservoir,without obvious sand production,collapse or screen tube failure.The sealing effect of the expanded well section is reliable,and there is no cement slurry channeling.Sealing failure does not occur after the stage collar is closed.This integrated technology effectively solves the challenges in block cementing and sand control.

关 键 词：固井 防砂 等离子割缝筛管 封隔器 分级箍 

分 类 号：TE256[石油与天然气工程—油气井工程] TE925