Non-steady Water-flooding Production Model of Areal Well Pattern Based on Flow Line Integral Method

doi:10.11885/j.issn.16745086.2014.10.15.01

Abstract

Abstract: The development of low-permeability reservoirs displays non-Darcy flow in the process of water-flooding, which makes the calculation methods based on Darcy's law not applicable. Based on the flow line integral method and considering the threshold pressure gradient,the production calculation formulas of the flow tube before and after water break- through were derived, then the calculation method of startup angle in the water-flooding development of areal well pattern was introduced, and finally the non-steady water-flooding production model of low-permeability reservoirs was established through numerical integration. This model could be used to predict the production of oil wells, and the reliability of the model was approved by comparison between calculation and realproduction. Applying the model to a certain block,we analyzed the effect of threshold pressure gradient,areal well pattern and production pressure drop in oil production. The results show that the threshold pressure gradient had great influence on the production of oil well,so it could not be ignored when predicting the development index;the production of five-spot well pattern was larger than others while its decrease was slow,so the five-spot well pattern is suggested in the oilfield; and the increase in production pressure drop could enhance the rate of production and shorten the development cycle of oilfields.

Key words: low-permeability reservoir, threshold pressure gradient, non-Darcy flow, flow line integral method, startup angle

CLC Number:

TE348

PU Jun, LIU Chuanxi, SHANG Genhua. Non-steady Water-flooding Production Model of Areal Well Pattern Based on Flow Line Integral Method[J]. 西南石油大学学报(自然科学版), 2016, 38(5): 97-106.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.16745086.2014.10.15.01

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2016/V38/I5/97

References

[1] 李颖川. 采油工程[M]. 北京:石油工业出版社, 2002:194-236. LI Yingchuan. Oil Extraction Engineering[M]. Beijing:Petroleum Industry Press, 2002:194-236.
[2] 熊伟,雷群,刘先贵,等. 低渗透油藏拟启动压力梯度[J]. 石油勘探与开发, 2009, 36(2):232-236. XIONG Wei, LEI Qun, LIU Xiangui, et al. Pseudo threshold pressure gradient to flow for low permeability reservoirs[J]. Petroleum Exploration and Development, 2009, 36(2):232-236.
[3] 郝斐,程松林,李春兰,等. 特低渗透油藏启动压力梯度研究[J]. 西南石油学院学报, 2006, 28(6):29-32. HAO Fei, CHENG Songlin, LI Chunlan, et al. Study on threshold pressure gradient in ultra low permeability reservoir[J]. Journal of Southwest Petroleum Institute, 2006, 28(6):29-32.
[4] 黄海. 西峰特低渗油藏流体渗流特征影响因素实验研究[J]. 西安石油大学学报(自然科学版), 2010, 25(6):35-37. HUANG Hai. Experimental study on the factors of influencing the seepage feature of the fluid in Xifeng extra low permeability reservoir[J]. Journal of Xi'an Shiyou University(Science & Technology Edition), 2010, 25(6):35-37.
[5] 宋付权,刘慈群. 低渗透油藏水驱采收率影响因素分析[J]. 大庆石油地质与开发, 2000, 19(1):30-36. SONG Fuquan, LIU Ciqun. Factors effecting the water flooding recovery in low permeable reservoirs[J]. Petroleum Geology & Oilfield Development in Daqing, 2000, 19(1):30-36.
[6] 李爱芬,刘敏,张化强,等. 低渗透油藏油水两相启动压力梯度变化规律研究[J]. 西安石油大学学报(自然科学版), 2010, 25(6):47-54. LI Aifen,LIU Min,ZHANG Huaqiang,et al. Experimental study on threshold pressure gradient of oil-water twophase seepage in low permeability reservoirs[J]. Journal of Xi'an Shiyou University(Science & Technology Edition), 2010, 25(6):47-54.
[7] 李菊花,高文君,杨永利,等. 水驱油田产量自然递减率多因素分析模型的建立[J]. 新疆石油地质, 2005, 26(6):667-669. LI Juhua, GAO Wenjun, YANG Yongli, et al. Multifactor analytical model for natural decline rate in waterflood field[J]. Xinjiang Petroleum Geology,2005,26(6):667-669.
[8] 时宇,杨正明,杨雯昱. 低渗储层非线性相渗规律研究[J]. 西南石油大学学报(自然科学版), 2011, 33(1):78-82. SHI Yu, YANG Zhengming, YANG Wenyu. Study of non-linear relative permeability in low permeability reservoir[J]. Journal of Southwest Petroleum University (Science & Technology Edition),2011,33(1):78-82.
[9] 薛成国,何青,杨正明,等. 低渗透平板模型非线性渗流物理模拟实验研究[J]. 西南石油大学学报(自然科学版), 2011, 33(6):101-104. XUE Chengguo, HE Qing, YANG Zhengming, et al. Experimental study of the nonlinear seepage with the two-dimensional physical model[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2011, 33(6):101-104.
[10] 杨正明,刘先贵,孙长艳,等. 低渗透油藏产量递减规律及水驱特征曲线[J]. 石油勘探与开发, 2000, 27(3):55-63. YANG Zhengming, LIU Xiangui, SUN Changyan, et al. Production decline law and water drive characteristic curves in low permeability reservoirs[J]. Petroleum Exploration and Development, 2000, 27(3):55-63.
[11] 牛彦良,李莉,韩德金,等. 低渗透油藏水驱采收率计算新方法[J]. 石油学报, 2006, 27(2):77-84. NIU Yanliang, LI Li, HAN Dejin, et al. A new method for calculating recovery factor of water drive in low-permeability reservoir[J]. Acta Petrolei Sinica, 2006, 27(2):77-84.
[12] 张楠,鲜波,陈亮,等. 非达西渗流效应对低渗透气藏直井产能的影响[J]. 成都理工大学学报(自然科学版), 2012, 39(4):438-442. ZHANG Nan, XIAN Bo, CHEN Liang, et al. Impact of non-Darcy flow on vertical well productivity in lowpermeability gas reservoirs[J]. Journal of Chengdu University of Technology (Science & Technology Edition), 2012, 39(4):438-442.
[13] 赖南君,叶仲斌,陈洪,等. 低张力体系改善低渗透油藏水驱渗流特征实验[J]. 石油与天然气地质, 2007, 28(4):520-522. LAI Nanjun, YE Zhongbin, CHEN Hong, et al. Experiment of low-tension system for improving percolation behaviors in waterflooding low-permeability reservoirs[J]. Oil & Gas Geology, 2007, 28(4):520-522.
[14] 计秉玉,李莉,王春艳. 低渗透油藏非达西渗流面积井网产油量计算方法[J]. 石油学报, 2008, 29(2):256-261. JI Bingyu, LI Li, WANG Chunyan. Oil production calculation for areal well pattern of low-permeability reservoir with non-Darcy seepage flow[J]. Acta Petrolei Sinica, 2008, 29(2):256-261.
[15] 张建国,雷光伦,张艳玉. 油气层渗流力学[M]. 东营:石油大学出版社, 2004:193-222.