Petroleum Reservoir Evaluation and Development >

2021 , Vol. 11 >Issue 5: 694 - 702

DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2021.05.005

Offshore Oil andGas Exploration and Development

Influence of micro displacement effect of permeability on water flooding and the direction of tapping potential of fluvial reservoir

  • Ke CHEN ,
  • Xudong ZHANG ,
  • Wei HE ,
  • Chao YIN ,
  • Lei TANG ,
  • Hu ZHANG ,
  • Zhongbin YE
Expand
  • 1. CNOOC Experimental Center（Bohai）, CNOOC EnerTech-Drilling & Production Co., Tianjin 300452, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received date: 2020-06-10

  Online published: 2021-10-12

Fold

Abstract

The geological conditions of marine fluvial sedimentary reservoir are very complex. In the process of water flooding development, the remaining oil distribution is dispersed and it is difficult to develop due to different water absorption in the same permeability reservoir. In order to guide the exploration direction of remaining oil in the later stage of each reservoir, the pore throat distribution characteristics and micro percolation characteristics of different permeability reservoirs are studied based on the micro pore throat scale by the mercury injection experiment and micro water drive visualization experiment. The results show that there is a good logarithmic correlation between the average pore throat radius and permeability, and the correlation coefficient is 0.963 5. With the increase of the reservoir permeability, the mean pore throat radius increases gradually, whereas the micro fingering phenomenon of water drive is reduced, and the water flooding process is gradually changing to finger-network-uniform displacement. Both the sweep efficiency and recovery efficiency of each model show an increasing tendency, and the proportion of continuous remaining oil is gradually decreasing. When the permeability increases to 2 228.7×10-3 μm 2, both the sweep efficiency and recovery efficiency reach their maximum value, the for is 82.97 %, the latter is 66.1%, and the proportion of continuous remaining oil reaches the minimum value of 45.82 %. For the reservoirs with permeability of （73.1 ~ 1 005.2）×10-3 μm 2, the main direction of potential tapping in the later period should be to increase the viscosity of displacement fluid and increase sweep. For reservoirs with permeability of （1 005.2~3 509.6）×10-3 μm 2, it turns to be improving oil displacement efficiency. For reservoirs with permeability of （3 509.6~ 4 040.6）×10-3 μm 2, it is appropriate to increase water injection pressure or block large water breakthrough channels to change the direction of injected water, so as to improve the conformance as the main direction of the potential tapping.

Key words： fluvial facies; permeability; mercury intrusion; pore throat characteristics; micro water flooding; remaining oil

Cite this article

Ke CHEN , Xudong ZHANG , Wei HE , Chao YIN , Lei TANG , Hu ZHANG , Zhongbin YE . Influence of micro displacement effect of permeability on water flooding and the direction of tapping potential of fluvial reservoir[J]. Petroleum Reservoir Evaluation and Development, 2021 , 11(5) : 694 -702 . DOI: 10.13809/j.cnki.cn32-1825/te.2021.05.005

References

[1] 陈凯, 翟刚, 姚为英, 等. 渤中区块河流相油藏高效开发模式总结与应用[J]. 石油化工应用, 2017, 36(8):19-23.
[1] CHEN Kai, ZHAI Gang, YAO Weiying, et al. High-efficient development pattern summary and application in fluvial facies reservoir of Bozhong Block[J]. Petrochemical Industry Application, 2017, 36(8):19-23.
[2] 石洪福, 何逸凡, 孙强, 等. 海上河流相稠油油藏选择性堵水研究[J]. 天然气与石油, 2020, 38(2):74-78.
[2] SHI Hongfu, HE Yifan, SUN Qiang, et al. Research on selective water plugging in offshore fluvial heavy oil reservoir[J]. Natural Gas and Oil, 2020, 38(2):74-78.
[3] 王双龙, 程奇, 房娜, 等. 锦州南油田古近系辫状河三角洲前缘沉积特征及砂体叠置模式[J]. 石油地质与工程, 2020, 34(6):20-27.
[3] WANG Shuanglong, CHENG Qi, FANG Na, et al. Sedimentary characteristics and sand body superimposition model of Paleogene braided river delta front in Jinzhou south oilfield[J]. Petroleum Geology & Engineering, 2020, 34(6):20-27.
[4] 李廷礼, 刘彦成, 于登飞, 等. 海上大型河流相稠油油田高含水期开发模式研究与实践[J]. 地质科技情报, 2019, 38(3):141-146.
[4] LI Tingli, LIU Yancheng, YU Dengfei, et al. Innovation and practice of development mode in high water-cut stage of large offshore fluvial heavy oilfield[J]. Geological Science and Technology Information, 2019, 38(3):141-146.
[5] 申春生, 胡治华, 李林, 等. 中高含水期河流相砂体剩余油定量预测新方法[J]. 地质科技情报, 2018, 37(5):49-53.
[5] SHEN Chunsheng, HU Zhihua, LI Lin, et al. A new method of quantitative prediction of remaining oil in fluvial facies sandstone at medium-high water cut stage[J]. Geological Science and Technology Information, 2018, 37(5):49-53.
[6] 张运来, 廖新武, 胡勇, 等. 海上稠油油田高含水期开发模式研究[J]. 岩性油气藏, 2018, 30(4):120-126.
[6] ZHANG Yunlai, LIAO Xinwu, HU Yong, et al. Development models for offshore heavy oil field in high water cut stage[J]. Lithologic Reservoirs, 2018, 30(4):120-126.
[7] 张伟, 许家峰, 耿站立, 等. 改善复杂河流相稠油油田水驱开发效果对策[J]. 当代化工, 2016, 45(11):2573-2576.
[7] ZHANG Wei, XU Jiafeng, GENG Zhanli, et al. Countermeasures for improving water-flooding development effect of complex fluvial facies reservoirs[J]. Contemporary Chemical Industry, 2016, 45(11):2573-2576.
[8] 黎盼. 低渗透砂岩储层微观孔隙结构表征及生产特征分析——以姬塬油田T井区长4+5、长6储层为例[D]. 西安:西北大学, 2019.
[8] LI Pan. Microscopic pore structure characterization and production characteristic analysis of low-permeability sandstone reservoir: A case study on Chang 4+5 and Chang 6 Reservoir of T Area in Jiyuan Oilfield[D]. Xi’an: Northwestern University, 2019.
[9] 安然. 中高渗油藏特高含水期剩余油富集机制及开发对策[D]. 青岛:中国石油大学(华东),2017.
[9] AN Ran. Study on remaining oil accumulation mechanism and development strategies of mid-high permeability reservoirs at extra-high water-cut stage[D]. Qingdao: China University of Petroleum(East China), 2017.
[10] 马婧, 李占东, 鲍楚慧. 基于恒速压汞的储层微观孔隙结构特征研究[J]. 河北工业科技, 2016, 33(2):132-138.
[10] MA Jing, LI Zhandong, BAO Chuhui. Study of the microscopic pore structure characteristics of the reservoir under constant-rate mercury penetration[J]. Hebei Journal of Industrial Science and Technology, 2016, 33(2):132-138.
[11] 张鹏, 张金功, 赵谦平, 等. 恒速压汞技术在定边长7致密砂岩储层微观孔喉空间表征中的应用[J]. 西北大学学报(自然科学版), 2018, 48(3):423-430.
[11] ZHANG Peng, ZHANG Jingong, ZHAO Qianping, et al. The application of constant-rate mercury penetration technology of Chang 7 tight sandstone reservoir pore-throat space representation in Dingbian Oildom[J]. Journal of Northwest University(Natural Science Edition), 2018, 48(3):423-430.
[12] 罗懿兰. 姬塬油田铁边城地区长6储层典型成岩相微观孔喉特征分析[D]. 西安:西北大学, 2018.
[12] LUO Yilan. Study on microscopic pore throat characteristics of typical diagenetic facies in Chang 6 Reservoir in Tiebiancheng area, Jiyuan Oilfield[D]. Xi’an: Northwest University, 2018.
[13] 康永梅, 李明, 王联国, 等. 鄂尔多斯盆地演武油田S1区块延8油层组微观水驱渗流特征[J]. 油气地质与采收率, 2019, 26(5):48-57.
[13] KANG Yongmei, LI Ming, WANG Lianguo, et al. Microscopic waterflooding percolation characteristics of Yan8 Formation in Block S1, Yanwu Oilfield, Ordos Basin[J]. Petroleum Geology and Recovery Efficiency, 2019, 26(5):48-57.
[14] 陈强. 华庆油田长63储层微观地质特征及剩余油分布研究[D]. 西安:西北大学, 2016.
[14] CHEN Qiang. Research on the micro geological characteristics and remaining oil distribution of Chang 63 Reservoir in Hua Qing Oilfield[D]. Xi’an: Northwestern University, 2016.
[15] 王惠娟. 基于纳米尺度的储层非均质性研究[D]. 青岛:中国石油大学(华东),2011.
[15] WANG Huijuan. Study on reservoir heterogeneity based on nanoscale[D]. Qingdao: China University of Petroleum(East China), 2011.
[16] 陈敏. 水驱油藏微观渗流机理定量描述研究[D]. 成都:西南石油大学, 2017.
[16] CHEN Min. Quantitative description of microscopic seepage mechanism in water drive reservoir[D]. Chengdu: Southwest Petroleum University, 2017.
[17] 何巧林, 关增武, 左小军, 等. 轮南2油田JIV油藏水驱实验及微观剩余油分布特征[J]. 新疆石油地质, 2017, 38(1):81-84.
[17] HE Qiaolin, GUAN Zengwu, ZUO Xiaojun, et al. Waterflooding experiment and micro-distribution of remaining oil in JIV reservoir in Lunnan-2 Oilfield[J]. Xinjiang Petroleum Geology, 2017, 38(1):81-84.
[18] 张小静, 段秋红, 申乃敏, 等. 聚驱后油藏微观剩余油水驱启动方式及优化挖潜[J]. 石油地质与工程, 2020, 34(5):63-68.
[18] ZHANG Xiaojing, DUAN Qiuhong, SHEN Naimin, et al. Starting mode and tapping potential of micro remaining oil-water drive after polymer flooding[J]. Petroleum Geology & Engineering, 2020, 34(5):63-68.
[19] 李沛桓. 低渗微观非均质油藏水驱机理及油水分布研究[D]. 北京:中国石油大学(北京),2018.
[19] LI Peihuan. Water flooding mechanisms and oil water distribution flooding in low permeability micro homogeneous reservoirs[D]. Beijing: China University of Petroleum(Beijing), 2018.
[20] 李俊键, 刘洋, 高亚军, 等. 微观孔喉结构非均质性对剩余油分布形态的影响[J]. 石油勘探与开发, 2018, 45(6):1043-1052.
[20] LI Junjian, LIU Yang, GAO Yajun, et al. Effects of microscopic pore structure heterogeneity on the distribution and morphology of remaining oil[J]. Petroleum Exploration and Development, 2018, 45(6):1043-1052.
[21] 杨艳. 冀东油田高孔高渗油藏大孔道识别与封堵技术研究[D]. 青岛:中国石油大学(华东),2013.
[21] YANG Yan. Study on the thief zone identification and plugging technology of high porosity and high permeability reservoir in Jidong Oilfield[D]. Qingdao: China University of Petroleum(East China), 2013.
[22] 曹新, 张文鹏, 于兆坤. 调剖调驱技术在非均质油气藏的应用[J]. 精细石油化工进展, 2018, 19(3):36-38.
[22] CAO Xin, ZHANG Wenpeng, YU Zhaokun. Application of profile control and oil displacement technology in heterogeneous oil and gas reservoir[J]. Advances in Fine Petrochemicals, 2018, 19(3):36-38.
Options
Outlines

/

〈 〉

Website Copyright © 2018 Petroleum Reservoir Evaluation and Development.
Tel: 025-66201779/66201780/66201781/66201782    0523-86667121　E-mail: 66scjs@vip.sina.com
Powered by Beijing Magtech Co. Ltd