高气油比页岩油同步回转混输装置  

Synchronous rotary multiphase flow unit used for high gas/oil ratio shale oil mixed transport

作　　者：钟建伟 黄战卫 刘环宇 岳渊洲 陈康林 高佳睿 付宇鑫 孙晟 ZHONG Jianwei;HUANG Zhanwei;LIU Huanyu;YUE Yuanzhou;CHEN Kanglin;GAO Jiarui;FU Yuxin;SUN Sheng(Shale Oil Development Branch,PetroChina Changqing Oilfield Company,Qingyang 745000,Gansu,China;National Engineering Laboratory for Exploration and Development of Low-Permeability Oil and Gas Fields,Xi'an 710018,Shaanxi,China)

机构地区：[1]中国石油长庆油田页岩油开发分公司,甘肃庆阳745000 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710018

出　　处：《石油钻采工艺》2024年第2期258-266,共9页Oil Drilling & Production Technology

基　　金：中国石油天然气集团有限公司科技项目“陆相页岩油规模增储上产与勘探开发技术研究”(编号:2023ZZ15YJ06)。

摘　　要：长庆油田庆城页岩油单井产能高,原油平均气油比大,常规油气分输工艺难以适应地面集输需求,需要探索经济、节能的油气混输新工艺。同步回转混输装置是一种全新的动力增压设备,具有压缩机和输油泵的双重特性,但存在处理能力低、故障频发的问题。对同步回转混输装置进行了技术改造:将装置减速机动力输出轴更改为双侧动力输出,主机布局调整为平面式组合结构,进出油管道安装增强纤维丝柔性软管;同时,对工艺配管进行了管径升级、均衡进液改造和连接方式优化,并配套了数据自动采集系统。在HH21等3座平台开展了现场试验,油井回压均控制在了1.0 MPa以内,回压最大降幅达到70%,常温集输半径延长了51%,伴生气回收率提高了73%,实现了对装置的远程操作和智能监控。改进后的同步回转混输装置适用于页岩油高气油比的油气混输,能够有效降低油井回压,缩短集输半径,提高伴生气回收率,该装置在页岩油高效开发过程中推广应用潜力巨大。(Purpose)Qingcheng shale oil in Changqing Oilfield presents such characteristics as higher single well productivity and greater average gas-oil ratio of crude oil.The traditional technology for oil and gas separate transportation is difficult to satisfy the ground gathering and transportation demands,thereby,it is necessary to explore new technology for oil and gas mixed transportation in terms of economy and energy-saving.Synchronous rotary multiphase flow unit is one novel power booster with dual nature of compressor and oil transfer pump,inclusive of lower processing capacity and frequent failures.(Methodology)This unit is updated by replacing the power take off shaft of reducing gear with two-sided power take-off,the main arrangement is modified into plane assembly configuration,and the oil taking pipeline and lead line are equipped with intensified fibre flexible hose.Furthermore,pipe diameter upgrade,balancing fluid inflow,and connection mode optimization are carried out in addition to complete automatic data acquisition system.(Findings)Field tests on three platforms including HH21 demonstrate that the return pressure of oil wells is controlled within 1.0 MPa after the application of synchronous rotary multiphase flow unit,with maximum pressure decline of 70%,the radius of gathering and conveying at normal temperature is extended by 51%,and the associated gas recovery percentage is increased by 73%,enabling the remote operation and intelligent monitoring.(Conclusions)The improved synchronous rotary multiphase flow unit is suitable for oil and gas mixed transportation of shale oil with high gas/oil ratio,can effectively reduce the backpressure of oil wells,shorten the gathering radius,and increase the associated gas recovery percentage,thus making this unit a great potential for popularization and application in the efficient development of shale oil.

关 键 词：页岩油 高气油比 油气混输 同步回转 伴生气 降回压 常温输送 集输半径 

分 类 号：TE866[石油与天然气工程—油气储运工程]