Special Oil & Gas Reservoirs >

2025 , Vol. 32 >Issue 2: 66 - 72

DOI: https://doi.org/10.3969/j.issn.1006-6535.2025.02.008

Reservoir Engineering

Dynamic characteristics of water breakthrough of fishbone multilateral well in bottom water reservoirs

  • CUI Chunxue ,
  • LIU Yuewu ,
  • DING Jiuge ,
  • ZHANG Guoqing ,
  • REN Yangqi ,
  • YANG Xiaofeng
Expand
  • 1. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;
    2. University of Chinese Academy of Sciences, Beijing 100190, China;
    3. School of Petroleum Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, China

Received date: 2024-06-28

  Revised date: 2025-01-05

  Online published: 2025-06-16

Fold

Abstract

The efficient development of bottom-water oil reservoirs is significantly constrained by the bottom-water coning during the development process.To address this issue,the study focused on the fishbone multilateral wells in bottom-water oil reservoirs and established a dynamic prediction model for the bottom-water coning by applying theoretical methods from fluid mechanics in porous medium and reservoir engineering to investigate the distribution pattern of water breakthrough time and position along the wellbore trajectory,thus clarifying the dynamic characteristics of water breakthrough in fishbone multilateral wells and conducting a sensitivity analysis.The study results show that:the interflow interference and diversion effects between the main wellbore and multilateral wellbores result in lower flow rates in the angular region near the wellbore junction,where a larger vertical pressure gradient in the reservoir leads to earlier water breakthrough.Subsequently,the middle section of the main wellbore and the heel ends of the multilateral wellbores near the main wellbore experience water breakthrough,while the ends of the main wellbore and the toe ends of the multilateral wellbores have relatively later water breakthrough times.Increasing the water-shutoff height,oil-water density difference,main wellbore length,and branch angle can effectively mitigate the bottom-water coning/cresting.When the main wellbore length exceeds 400 m and the branch angle exceeds 30°,the increase in water breakthrough time slows down.It is more reasonable to position the wellbore height at 80% of the reservoir thickness.Heavy oil reservoirs are more prone to bottom-water cresting compared to light oil reservoirs.The research results provide significant practical guidance for oilfields to determine reasonable operating policies,delay water breakthrough time,and enhance water-free cumulative production and recovery efficiency.

Key words： bottom water reservoir; fishbone multilateral well; coning/water cresting; water breakthrough dynamic

Cite this article

CUI Chunxue , LIU Yuewu , DING Jiuge , ZHANG Guoqing , REN Yangqi , YANG Xiaofeng . Dynamic characteristics of water breakthrough of fishbone multilateral well in bottom water reservoirs[J]. Special Oil & Gas Reservoirs, 2025 , 32(2) : 66 -72 . DOI: 10.3969/j.issn.1006-6535.2025.02.008

References

[1] TANG B,REN K,LU H,et al.Study on residual oil distribution law during the depletion production and water flooding stages in the fault-karst carbonate reservoirs[J].Processes,2023,11(7):2147.
[2] SHANG B,HAN X,LI S,et al.Research of water control technology for horizontal wells in water-driven reservoirs[J].Advances in Geo-Energy Research,2018,2(2):210-217.
[3] YOU Q,Wen Q,Fang J,et al.Experimental study on lateral flooding for enhanced oil recovery in bottom-water reservoir with high water cut[J].Journal of Petroleum Science and Engineering,2019,174:747-756.
[4] BAHADORI A,NOURI A.Prediction of critical oil rate for bottom water coning in anisotropic and homogeneous formations[J].Journal of Petroleum Science and Engineering,2012,82:125-129.
[5] CHEN D,ZHAO H,LIU K,et al.The effect of emulsion and foam on anti-water coning during nitrogen foam injection in bottom-water reservoirs[J].Journal of Petroleum Science and Engineering,2021,196:107766.
[6] SHAN W Y,ZHANG X.The research for delaying the bottom water coning in horizontal wells application balance screen pipe[J].Advanced Materials Research,2013,734:1480-1483.
[7] 乐平,杜志敏,陈小凡,等.一种新的底水油藏鱼骨分支水平井耦合模型[J].西南石油大学学报(自然科学版),2015,37(4):117-126.
LE Ping,DU Zhimin,CHEN Xiaofan,et al.A coupling model of fishbone multilateral horizontal well in bottom water reservoir[J].Journal of Southwest Petroleum University(Science & Technology Edition),2015,37(4):117-126.
[8] 邓勇,陆燕妮,马成,等.底水油藏水平井临界产量计算方法[J].油气井测试,2022,31(4):1-5.
DENG Yong,LU Yanni,MA Cheng,et al.A method to calculate the critical production of horizontal wells in bottom water reservoir[J].Well Testing,2022,31(4):1-5.
[9] 石飞,岳宝林,肖波,等.底水油藏水平井开发临界生产压差的确定[J].重庆科技学院学报(自然科学版),2021,23(4):41-45,115.
SHI Fei,YUE Baolin,XIAO Bo,et al.Determination of critical producing pressure drop of horizontal well in bottom water reservoir[J].Journal of Chongqing University of Science and Technology(Natural Sciences Edition),2021,23(4):41-45,115.
[10] 羊勇,杨文飞,刘丹,等.底水油藏含水上升机理探讨[J].石油化工应用,2020,39(2):89-91,105.
YANG Yong,YANG Wenfei,LIU Dan,et al.Discussions on the mechanism of water cut rising in bottom water reservoir[J].Petrochemical Industry Application,2020,39(2):89-91,105.
[11] 朱玉双,吴均,武平仓,等.底水油藏开发室内模拟实验研究[J].石油学报,2008,8(1):97-100.
ZHU Yushuang,WU Jun,WU Pingcang,et al.Indoor simulation experiment on exploitation of bottom water reservoir[J].Acta Petrolei Sinica,2008,8(1):97-100.
[12] 黄传艳,裴柏林.水平井开采底水油藏三维物理模拟实验[J].内蒙古石油化工,2009,35(5):123-125.
HUANG Chuanyan,PEI Bolin.3-D physical modeling of water coning of horizontal well production in bottom water driving reservoirs[J].Inner Mongolia Petrochemical Industry,2009,35(5):123-125.
[13] 王家禄,刘玉章,江如意,等.水平井开采底水油藏水脊脊进规律的物理模拟[J].石油勘探与开发,2007,25(5):590-593.
WANG Jialu,LIU Yuzhang,JIANG Ruyi,et al.2-D physical modeling of water coning of horizontal well production in bottom water driving reservoirs[J].Petroleum Exploration and Development,2007,25(5):590-593.
[14] 刘欣颖,胡平.非均质底水油藏水平井三维物理模拟实验[J].石油学报,2011,32(6):1012-1016.
LIU Xinying,HU Ping.A 3-D visible physical experiment on horizontal wells of heterogeneous reservoirs with bottom water[J].Acta Petrolei Sinica,2011,32(6):1012-1016.
[15] 常元昊,乐平,姜汉桥,等.底水油藏多分支水平井水脊规律[J].断块油气田,2016,23(4):501-504.
CHANG Yuanhao,LE Ping,JIANG Hanqiao,et al.Laws of water cone of multilateral horizontal well in bottom water reservoir[J].Fault-Block Oil & Gas Field,2016,23(4):501-504.
[16] 魏明强,王浩,段永刚,等.考虑段间SRV非均质性的海陆过渡相页岩气压裂水平井产出剖面预测模型[J].天然气工业,2023,43(8):80-89.
WEI Mingqiang,WANG Hao,DUAN Yonggang,et al.Production profile prediction model of fractured marine-terrestrial transitional facies shale gas horizontal wells considering SRV heterogeneity between different sections[J].Natural Gas Industry,2023,43(8):80-89.
[17] 闫霞,熊先钺,李曙光,等.深层煤岩气水平井各段产出贡献及其主控因素——以鄂尔多斯盆地东缘大宁—吉县区块为例[J].天然气工业,2024,44(10):80-92.
YAN Xia,XIONG Xianyue,LI Shuguang,et al.Production contributions of deep CBM horizontal well sections and their controlling factors:a case study of Daning-Jixian Area,eastern Ordos Basin[J].Natural Gas Industry,2024,44(10):80-92.
[18] 高盛恩,吴晓东,韩国庆,等.底水油藏多分支井见水时间影响因素[J].油气地质与采收率,2016,23(3):116-119,126.
GAO Sheng′en,WU Xiaodong,HAN Guoging,et al.Influencing factors of water breakthrough time for multilateral wells in bottom water reservoirs[J].Petroleum Geology and Recovery Efficiency,2016,23(3):116-119,126.
[19] 李传亮.油藏工程原理[M].成都:西南石油学院出版社,2003:380-450.
LI Chuanliang.Principles of reservoir engineering[M].Chengdu:Press of Southwest Petroleum Institute,2003:380-450.
[20] 刘冰.射孔水平井产能评价及完井参数优化研究[D].北京:中国石油大学(北京),2011.
LIU Bing.Productivity evaluation and completion parameter optimization of perforated horizontal wells[D].Beijing:China University of Petroleum(Beijing),2011.
[21] 孔祥言.高等渗流力学[M].北京:中国科学技术大学出版社,1999:264-430.
KONG Xiangyan.Advanced mechanics of fluid flow in porous media[M].Beijing:Press of University of Science and Technology of China,1999:264-430.
Options
Outlines

/

〈 〉