Special Oil & Gas Reservoirs >

2024 , Vol. 31 >Issue 2: 136 - 142

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.02.016

Reservoir Engineering

A New Method for Productivity Prediction of Offshore Heavy Oil Reservoirs Based on Logging Curves Considering Longitudinal Permeability Ratio

  • Feng Shasha ,
  • Wang Kun ,
  • Xie Mingying ,
  • Li Li ,
  • Wang Danling
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  • CNOOC China Limited, Shenzhen branch, Shenzhen, Guangdong 518000, China

Received date: 2023-02-23

  Revised date: 2024-01-15

  Online published: 2024-07-26

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Abstract

There are large errors between the designed productivity and the actual productivity of directional wells in heavy oil reservoirs with multi-layer combined production. Taking PY10-2 Oilfield in the eastern part of the South China Sea as an example, a reasonable characterization study of flow characteristics of heavy oil reservoirs was carried out. Based on logging curves considering the longitudinal permeability ratio, a productivity model and evaluation method were developed that integrated the influences of factors such as the power-law of heavy oil fluid, longitudinal heterogeneity, start-up pressure, and stress-sensitivity to characterize the strong longitudinal heterogeneity in such reservoirs finely. Good results were achieved in the evaluation of actual oilfield productivity. The research results show that the prediction accuracy of this model is dramatically improved compared with the traditional method, and the average errors of the predicted productivity are less than 10.0%. The productivity of directional wells decreases with the decrease of the power law exponent; the influence of the power-law index on the production capacity increases when the bottom hole flow pressure decreases; the increase in productivity index decreases when the producing pressure drop of the directional wells rises. This study is of great significance for evaluating the reasonable productivity of similar offshore reservoirs.

Key words： heavy oil reservoir; directional well; longitudinal permeability ratio; power-law fluid; productivity evaluation

Cite this article

Feng Shasha , Wang Kun , Xie Mingying , Li Li , Wang Danling . A New Method for Productivity Prediction of Offshore Heavy Oil Reservoirs Based on Logging Curves Considering Longitudinal Permeability Ratio[J]. Special Oil & Gas Reservoirs, 2024 , 31(2) : 136 -142 . DOI: 10.3969/j.issn.1006-6535.2024.02.016

References

[1] 朱伟林.中国近海油气勘探进展[J].中国工程科学,2010,12(5):18-24.
ZHU Weilin.Advancements of oil and gas exploration in China offshore area:overview and perspective[J].Strategic Study of CAE,2010,12(5):18-24.
[2] 朱维耀,鞠岩,杨正明,等.稠油油藏水平井、垂直井产能分析[J].特种油气藏,2002,9(1):32-33.
ZHU Weiyao,JU Yan,YANG Zhengming,et al.Analysis of horizontal and vertical well productivity in heavy oil reservoi[J].Special Oil & Gas Reservoirs,2002,9(1):32-33.
[3] 李浩楠,师耀利,姚振华,等.玛18 井区低渗透砂砾岩油藏水平井优化设计及产能预测[J].特种油气藏,2021,28(6):83-90.
LI Haonan,SHI Yaoli,YAO Zhenhua,et al.Design optimization and productivity prediction of horizontal wells in low-permeability conglomerate reservoir in Well Block Ma 18[J].Special Oil & Gas Reservoirs,2021,28(6):83-90.
[4] 庞兴河,何勇明,刘辉.一种新的稠油油藏水平井产能预测方法[J].石油钻探技术,2004,32(1):51-53.
PANG Xinghe,HE Yongming,LIU Hui.A novel method of predicting heavy oil productivity in horizontal wells[J].Petroleum Drilling Techniques,2004,32(1):51-53.
[5] 张继芬,王再山,高文君.(拟)稳定流斜直井产能预测方法[J].大庆石油地质与开发,1995,14(4):69-74.
ZHANG Jifen,WANG Zaishan,GAO Wenjun.Deflecting well productivity prediction mathematical model[J].Petroleum Geology & Oilfield Development in Daqing,1995,14(4):69-74.
[6] 张振华,鄢捷年.储层损害对大斜度定向井产能影响的计算方法研究[J].石油钻采工艺,2001,23(6):40-43.
ZHANG Zhenhua,YAN Jienian.Study of fomation damage effect on the productivity for directional wells[J].Oil Drilling & Production Technology,2001,23(6):40-43.
[7] CINCO H, MILLER H G,RAMEY H J.Unsteady-state pressure distribution created by a directional drilled well[J].Journal of Petroleum Technology,1975,27(11):1392-1400.
[8] BESSON J.Performance of slanted and horizontal wells on an an-isotropic medium[C].SPE 20965-MS,1990:219-231.
[9] VANDERVLIS A C,DUNS H,LUQUE R F.Increasing well productivity in tight chalk reservoirs[M].Bucharest:WPC,1979:71-78.
[10] 万仁溥.水平井开采技术[M].北京:石油工业出版社,1995:26-38.
WAN Renpu.Horizontal well recovery technology[M].Beijing:Petroleum Industry Press,1995:26-38.
[11] 李兆敏,蔡国琰.非牛顿流体力学[M].东营:石油大学出版社,1998:127-131.
LI Zhaomin,CAI Guoyan.Non Newtonian fluid flow[M].Dongying:China University of Petroleum Press,1998:127-131.
[12] 吴信荣,张平,董贤勇,等.对本构方程书写形式的探讨[J].中国石油大学学报(自然科学版),2004,28(5):86-89.
WU Xinrong,ZHANG Ping,DONG Xianyong,et al.Discussion on expression of constitutive equations[J]. Journal of China University of Petroleum(Edition of Natural Science),2004,28(5):86-88,98.
[13] VONGVUTHIPORNVHAI S,RAGHAVAN R.Well test analysis of data dominated by storage and skin:non-Newtonian power-law fluids[C].SPE14454-PA,1987:618-628.
[14] 胡心玲,曹晨光,梁文川.基于分形理论的多孔介质稠油启动压力梯度计算与分析[J].断块油气田,2022,29(4):514-519.
HU Xinling,CAO Chenguang,LIANG Wenchuan.Calculation and analysis of threshold pressure gradient of heavy oil in porous media based on fractal theory[J]. Fault-Block Oil & Gas Field,2022,29(4):514-519.
[15] 黎明,周福建,李奔,等.考虑温度变化的砂岩油藏应力敏感模型[J].科学技术与工程,2021,21(34):14542-14547.
LI Ming,ZHOU Fujian,LI Ben,et al.Stress sensitivity model for sandstone reservoirs considering temperature changes[J].National Major Science and Technology Project,2021,21(34):14542-14547.
[16] 高中臣,李绍杰,曹晨光,等.八面河稠油流变性及单相渗流启动压力梯度实验研究[J].江汉石油职工大学学报,2022,35(4):39-41.
GAO Zhongchen,LI Shaojie,CAO Chenguang,et al.Experimental study on heavy oil rheological properties and starting pressure gradient of single-phase seepage in Bamianhe Oilfield[J].Journal of Jianghan Petroleum University of Staff and Workers,2022,35(4):39-41.
[17] 姜瑞忠,倪庆东,张春光,等.基于应力敏感的稠油油藏变启动压力梯度渗流模型与数值模拟研究[J].油气地质与采收率,2021,28(6):54-62.
JIANG Ruizhong,NI Qingdong,ZHANG Chunguang,et al.Research on seepage model and numerical simulation of variable starting pressure gradient for heavy oil reservoirs based on pressure sensitive effect[J].Petroleum Geology & Recovery Efficiency,2021,28(6):54-62.
[18] 孙建芳.胜利油区稠油非达西渗流启动压力梯度研究[J].油气地质与采收率,2010,17(6):74-77.
SUN Jianfang.Threshold pressure gradient study on non-Newtonian flow of heavy oil reservoirs in Shengli Oilfield[J]. Petroleum Geology & Recovery Efficiency,2010,17(6):74-77.
[19] 李承龙,李敏,何鑫迪.基于压敏效应的变启动压力梯度渗流模型[J].大庆石油地质与开发,2020,40(1):81-89.
LI Chenglong,LI Min,HE Xindi.Seepage model of the variable starting pressure gradient based on the pressure sensitive effect[J].Petroleum Geology & Oilfield Development in Daqing,2020,40(1):81-89.
[20] 石立华,喻高明,袁芳政,等.海上稠油砂岩油藏启动压力梯度测定方法及应用——以秦皇岛32-6油田为例[J].油气地质与采收率,2014,21(3):82-85.
SHI Lihua,YU Gaoming,YUAN Fangzheng,et al.Experimental method and its application on threshold pressure gradient for offshore sandstone in heavy oil reservoir: a case study of QHD 32-6 Oilfield[J].Petroleum Geology & Recovery Efficiency,2014,21(3):82-85.
[21] 张政,杨胜来,张希胜,等.特低渗透油藏定向井动用半径对产能的影响[J].科学技术与工程,2022,22(14):5595-5600.
ZHANG Zheng,YANG Shenglai,ZHANG Xisheng,et al.Influence of producing radius of directional well on productivity in ultra low permeability reservoir under different seepage models[J].Science Technology and Engineering.2022,22(14):5595-5600.
[22] 田巍,邓瑞健,刘云华,等.钻井液对海相储层伤害及产能的影响[J].科学技术与工程,2022,22(1):129-135.
TIAN Wei, DENG Ruijian, LIU Yunhua, et al.Effect of drilling fluid on reservoir damage and productivity of marine reservoir[J].Science Technology and Engineering,2022,22(1):129-135.
[23] 李琳琳.压裂水平井水电模拟实验边界修正方法[J].油气藏评价与开发,2019,9(1): 61-63,71.
LI Linlin.A boundary modification for water and electricity analogy experiment of fractured horizontal wells[J].Petroleum Reservoir Evaluation and Development,2019,9(1):61-63,71.
[24] 黄世军,康博韬,程林松,等.海上普通稠油油藏多层合采层间干扰定量表征与定向井产能预测[J].石油勘探与开发,2015,42(4):488-495.
HUANG Shijun,KANG Botao,CHENG Linsong,et al.Quantitative characterization of interlayer interference and productivity prediction of directional wells in the multilayer commingled production of ordinary offshore heavy oil reservoirs[J].Petroleum Exploration and Development,2015,42(4):488-495.
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