A New Forecasting Model of a Wellbore Wax Deposition Profile in a Offshore Well
-
摘要: 为了缓解井筒结蜡给海上油田油气开采造成的消极影响，研究了海上结蜡油井的蜡质沉积规律，并建立了一种海上油井井筒结蜡剖面预测新模型。该模型基于对4种现有模型的机理分析，采用理论与试验相结合的方法，综合考虑了分子扩散、剪切弥散和蜡层的老化与剥蚀损失等结蜡机理。通过实例对新模型与4种现有模型的结蜡剖面预测结果进行了对比分析，并结合渤海油田海上结蜡油井的生产数据，检验了新模型对结蜡井筒流体温度和压力的计算精度，新模型计算井口温度的相对误差为1.32%，计算井下压力的相对误差为0.30%，计算精度良好；利用新模型分析了生产时间、产量、含水率和生产气油比等影响结蜡因素的敏感性，认为结蜡厚度随生产时间递增，受产量和含水率的影响较大，受生产气油比的影响相对较小。研究结果表明，新模型能够较为准确地预测海上结蜡电动潜油离心泵油井井筒的结蜡剖面，可以为海上电潜泵结蜡井的清蜡防蜡工艺优选与实施提供指导。Abstract: To alleviate the negative effects of wellbore wax deposition in offshore oil and gas production,research on wax deposition in offshore oilfields were carried out and a new forecasting model for wellbore wax deposition profile was established.The new model was developed on the basis of the existing four wax deposition mechanisms with comprehensive consideration to molecule diffusion,shear dispersion,shear erosion and wax layer aging.By using field data,performances of the new model were compared with waxing patterns in the four existing models.Calculation accuracy of wellhead temperatures (WHT) and bottom-hole pressures (BHP) of the new model was verified by using the production data from offshore wells with wax deposition in the Bohai Oilfield.Test results showed that the new model has higher accuracy with a relative calculation error of 1.32% for WHT and 0.30% for BHP,respectively.Sensitivities of influencing factors such as producing time,flow rates,water cut and production GORs were analyzed in the new model,and it indicated that wax deposition thicknesses may increase with the extension of producing time and they are highly sensitive to flow rates and water cut,whereas impacts of productions GOR are relatively low.Research results showed that the new model can accurately forecast the deposition of wax in offshore ESP wells and may provide valuable guidance for wax control and removal.
-
-
[1] 张琪,孙大同,樊灵,等.采油工程原理与设计[M].东营:石油大学出版社,2000:348-353. ZHANG Qi,SUN Datong,FAN Ling,et al.Theories and designs of oil production engineering[M].Dongying:Petroleum University Press,2000:348-353. [2] 窦红梅,王龙飞.青海油田亲水钝化膜防蜡技术研究[J].石油钻探技术,2013,41(5):93-97. DOU Hongmei,WANG Longfei.An inactive water-wet film for paraffin inhibition in Qinghai Oilfield[J].Petroleum Drilling Techniques,2013,41(5):93-97. [3] 都芳兰,吴均,马国友,等.老爷庙浅层油井化学清防蜡工艺及应用[J].石油钻采工艺,2007,29(增刊1):91-93. DU Fanglan,WU Jun,MA Guoyou,et al.Technology and application of chemical paraffin removal and proofing for Laoyemiao low layer oil wells[J].Oil Drilling Production Technology,2007,29(supplement 1):91-93. [4] 王在强,王秀华,潘宏文,等.油井清防蜡工艺在西峰油田的应用[J].断块油气田,2007,14(2):76-77. WANG Zaiqiang,WANG Xiuhua,PAN Hongwen,et al.Application of wax control and removal technology in Xifeng Oilfield[J].Fault-Block Oil Gas Field,2007,14(2):76-77. [5] BROGIOLI D,VAILATI A.Diffusive mass transfer by nonequilibrium fluctuations:Fick’s law revisited[J].Physical Review E:Statistical Nonlinear Soft Matter Physics,2001,63(1):102-105.
[6] 陈德春,刘均荣,吴晓东,等.含蜡原油井筒结蜡剖面的预测模型[J].石油大学学报(自然科学版),1999,23(4):36-38,44. CHEN Dechun,LIU Junrong,WU Xiaodong,et al.Models for predieting paraffin deposition profile in waxye oil wellbore[J].Journal of the University of Petroleum,China(Edition of Natural Science),1999,23(4):36-38,44. [7] HSU J J C,BRUBAKER J P.含蜡原油管道蜡沉积放大模型[J].黄启玉,译.油气储运,1996,15(1):61-64. HSU J J C,BRUBAKER J P.Wax deposition scale-up model for waxy crude production lines[J].HUANG Qiyu,translated.Oil Gas Storage and Transportation,1996,15(1):61-64. [8] 黄启玉,李瑜仙,张劲军.普适性结蜡模型研究[J].石油学报,2008,29(3):459-462. HUANG Qiyu,LI Yuxian,ZHANG Jinjun.Unified wax deposition model[J].Acta Petrolei Sinica,2008,29(3):459-462. [9] ANDREY S.Wax-deposition forecast[R].SPE 149793,2012.
[10] 刘力华.高含蜡油井石蜡沉积规律及防治研究[D].成都:西南石油大学,2013. LIU Lihua.Study onparaffin deposition law and prevention of wax troubled wells[D].Chengdu:Southwest Petroleum University,2013. [11] FORSYTHEG E,MALCOLM M A,MOLER C B.Computer methods for mathematical computations[M].Englewood Cliffs,NJ:Prentice-Hall,1977.
[12] 姚传进,雷光伦,蒋宝云,等.高凝油井筒温度场计算及流态转变分析[J].石油钻采工艺,2011,33(3):42-46. YAO Chuanjin,LEI Guanglun,JIANG Baoyun,et al.Wellbore-temperature distribution calculation and of flow pattern changing analysis in high pour-point oil wells[J].Oil Drilling Production Technology,2011,33(3):42-46. [13] 孙百超,王岳,尤国武.含蜡原油热输管道管壁结蜡厚度的计算[J].石油化工高等学校学报,2003,16(4):48-51. SUN Baichao,WANG Yue,YOU Guowu.Calculation of the paraffin deposit thickness on the wall in hot wax bearing crude pipeline[J].Journal of Petrochemical Universities,2003,16(4):48-51. [14] 白帆.原油组成对结蜡规律影响的研究[D].青岛:中国石油大学(华东),2014. BAI Fan.Effect of crude oil composition on wax deposition law[D].Qingdao:China University of Petroleum(Huadong),2014. [15] 刘扬,王志华,成庆林,等.大庆原油管输结蜡规律与清管周期的确定[J].石油学报,2012,33(5):892-897. LIU Yang,WANG Zhihua,CHENG Qinglin,et al.The study of pipeline wax deposition law and pigging period for Daqing waxy crude oil[J].Acta Petrolei Sinica,2012,33(5):892-897. [16] 邱姝娟,吴明,赵玲,等.原油管道结蜡预测模型研究[J].管道技术与设备,2005,13(5):6-7. QIU Shujuan,WU Ming,ZHAO Ling,et al.Grey prediction model of wax deposition[J].Pipeline Technique and Equipment,2005,13(5):6-7. [17] 王利中.油井结蜡速度及清蜡周期预测[J].西部探矿工程,2003,15(11):54-55. WANG Lizhong.Paraffin deposition rate and prediction of wax removal period in oil wells[J].West-China Exploration Engineering,2003,15(11):54-55. [18] ZEMANSKY M W.Heat and thermodynamics:an intermediate textbook for students of physics,chemistry,and engineering[M].New York:McGraw-Hill Companies,1968:182-355.
-
期刊类型引用(3)
1. 苏超, 吴亮, 张卓, 陈洪地. 页岩气返排测试过程中防砂控砂技术浅析. 非常规油气. 2018(01): 76-79 . 
百度学术
2. 苏超, 吴亮, 张卓, 陈洪地. 页岩气返排测试过程中防砂控砂技术浅析. 非常规油气. 2018(02): 94-97 . 百度学术
3. 李川, 张翔, 杜现飞, 唐梅荣, 王广涛, 李昌恒. 鄂尔多斯盆地致密油应力循环压裂技术. 石油钻采工艺. 2018(04): 494-498 . 百度学术
其他类型引用(2)
计量
- 文章访问数: 7739
- HTML全文浏览量: 97
- PDF下载量: 6713
- 被引次数: 5
下载:
