Lithologic Reservoirs ›› 2018, Vol. 30 ›› Issue (6): 131-137.doi: 10.12108/yxyqc.20180616

Previous Articles     Next Articles

Dynamical characteristics of inclined well in dual medium low permeability reservoir

JIANG Ruizhong, SHEN Zeyang, CUI Yongzheng, ZHANG Fulei, ZHANG Chunguang, YUAN Jianwei   

  1. Faculty of Petroleum Engineering, China University of Petroleum(East China), Qingdao 266580, Shandong, China
  • Received:2018-03-30 Revised:2018-05-23 Online:2018-11-16 Published:2018-11-16

PDF (PC)

397

Abstract: Inclined wells have been widely used in the development of reservoirs, but the well test interpretation techniques in inclined wells are currently less studied. At the same time, considering the phenomenon of stresssensitivity effect and threshold pressure gradient in low permeability reservoirs, we introduced permeability modulus and threshold pressure gradient to establish a mathematical model of inclined well in dual-medium low-permeability reservoir. By using sink source superposition and Green function, the bottom hole pressure response of this model was obtained and the plots of inclined well test curves were drawn. The results show that:the well test curve can be divided into six flow sections:wellbore storage section, transition flow section, well inclination control section, crack radial flow section, cross flow section and late radial flow section. In addition, the effect of threshold pressure gradient or stress-sensitivity effect led to a sharp upturn in the later stages of the pressure and the derivative curve, and the upturns caused by the effect of threshold pressure gradient was relatively larger. Otherwise, considering these two factors at the same time, their effects overlapped each other, so the upturn was obvious. When the deviation angle was greater than 30°, the pressure derivative curve characteristics were similar to that of horizontal wells and there was a vertical radial flow section, otherwise it was similar to that of vertical wells. The analytical solution was obtained by this model, and the parameter interpretation result was more accurate. Therefore, it can provide a theoretical guidance for developing low permeability reservoirs with inclined wells.

Key words: dual medium, low permeability reservoir, threshold pressure gradient, stress-sensitivity effect, inclined well test

CLC Number: 

  • TE348
[1] 田敏. 胜利油田新增探明储量SEC评估现状与分析. 岩性油气藏, 2017, 29(1):97-103. TIAN M. The status and analysis of SEC evaluation results for new-added proved reserves in Shengli Oilfield. Lithologic Reservoirs, 2017, 29(1):97-103.
[2] 张海勇, 何顺利, 栾国华, 等. 微裂缝超低渗储层的应力敏感实验研究. 西安石油大学学报(自然科学版), 2015, 30(1):30-33. ZHANG H Y, HE S L, LUAN G H, et al. Experimental study on stress sensitivity of microfracture ultra-low permeability reservoirs. Journal of Xi'an Shiyou University(Natural Science Edition), 2015, 30(1):30-33.
[3] 李善鹏, 吴凯, 方艳兵. 特低渗透油藏启动压力现象研究——以侯市地区为例. 岩性油气藏, 2009, 21(1):125-127. LI S P, WU K, FANG Y B. Study on the starting pressure phenomenon in ultra-low permeability reservoir:an example from Houshi area. Lithologic Reservoirs, 2009, 21(1):125-127.
[4] ZENG B, CHENG L, LI C. Low velocity non-linear flow in ultra-low permeability reservoir. Journal of Petroleum Science & Engineering, 2011, 80(1):1-6.
[5] 邓学峰. 致密低渗油藏压裂水平井合理生产压差优化设计. 岩性油气藏, 2017, 29(1):135-139. DENG X F. Optimization of reasonable production pressure difference of fractured horizontal well in low permeability tight reservoirs. Lithologic Reservoirs, 2017, 29(1):135-139.
[6] 赵习森, 党海龙, 庞振宇, 等. 特低渗储层不同孔隙组合类型的微观孔隙结构及渗流特征——以甘谷驿油田唐157井区长6储层为例. 岩性油气藏, 2017, 29(6):8-14. ZHAO X S, DANG H L, PANG Z Y, et al. Microscopic pore structure and seepage characteristics of different pore assemblage types in ultra low permeability reservoir:a case of Chang 6 reservoir in Tang 157 well area, Ganguyi Oilfield. Lithologic Reservoirs, 2017, 29(6):8-14.
[7] 陈引弟. 渗透率应力敏感油藏试井解释模型研究. 成都:西南石油大学, 2017. CHEN Y D. Study of well test interpretation model in stresssensitive reservoir. Chengdu:Southwest Petroleum University, 2017.
[8] 郝斐, 程林松, 李春兰, 等. 考虑启动压力梯度的低渗透油藏不稳定渗流模型. 石油钻采工艺, 2006, 28(5):58-60. HAO F, CHEN L S, LI C L, et al. An unsteady flow model for low permeability reservoirs considering threshold pressure gradient. Oil Drilling & Production Technology, 2006, 28(5):58-60.
[9] 张旭. 斜井试井分析理论及其特征研究. 成都:西南石油大学, 2012. ZHANG X. Wellbore well test analysis theory and its characteristics. Chengdu:Southwest Petroleum University, 2012.
[10] CINCO L H. Unsteady-state pressure distribution created by a directionally drilled well or a well with an inclined fracture. Stanford, Calif:Standford University, 1974.
[11] ABBASZADEH M, HEGEMAN P S. Pressure-transient analysis for a slanted well in a reservoir with vertical pressure support. SPE Formation Evaluation, 1990, 5(3):277-284.
[12] 廖新维. 双重介质拟稳态油藏斜井试井模型研究. 石油勘探与开发, 1998, 25(5):57-61. LIAO X W. Discussion of slanted well test model in dual porosity reservoirs with pseudo steady state flow. Petroleum Exploration and Development, 1998, 25(5):57-61.
[13] 任俊杰, 郭平, 汪周华. 三重介质油藏斜井压力动态特征分析. 水动力学研究与进展, 2012, 27(1):7-15. REN J J, GUO P, WANG Z H. Dynamical characteristic analysis of inclined well in triple medium reservoir. Chinese Journal of Hydrodynamics, 2012, 27(1):7-15.
[14] 周兴燕, 章友洪. 斜井试井研究新方法. 重庆科技学院学报(自然科学版), 2013, 15(6):42-44. ZHOU X Y, ZHANG Y H. Research of deviated well and testing well. Journal of Chongqing University of Science and Technology(Natural Sciences Edition), 2013, 15(6):42-44.
[15] RAGHAVAN R, SCORER J D T, MILLER F G. An investigation by numerical methods of the effect of pressure dependent rock and fluid properties on well flow tests. Society of Petroleum Engineers Journal, 1972, 12(3):267-275.
[16] SAMANIEGO F, CINCO L H. On the determination of the pressure dependent characteristics of a reservoir through transient pressure testing. Society of Petroleum Engineers, 1989:285-287.
[17] 邢承林. 具有启动压力梯度的不稳定渗流理论研究. 成都:西华大学, 2010. XING C L. Theoretical research of unsteady flow in porous media related start-up pressure gradients. Chengdu:Xihua University,2010.
[18] 刘永良, 徐艳梅, 刘彬, 等. 考虑启动压力梯度低渗双重介质油藏垂直裂缝井试井模型. 油气井测试, 2010, 19(5):5-8. LIU Y L, XU Y M, LIU B, et al. Well test model of vertical fractured wells in double porosity reservoir with low permeability with consideration of startup pressure gradient. Well Testing, 2010, 19(5):5-8.
[19] ZHANG Y, WANG Z S, YAO J, et al. Study and application of pressure transient of naturally fractured reservoirs with stresssensitive and start pressure grade. Journal of Hydrodynamics, 2007, 22(3):332-337.
[20] 杨志兴, 杨明, 刘海成, 等. 低渗变形介质油藏斜井试井及现场应用.科学技术与工程, 2014, 14(21):81-88. YANG Z X, YANG M, LIU H C, et al. Well deviated well testing and field application in low permeability deformation medium reservoir. Science Technology and Engineering, 2014, 14(21):81-88.
[21] CINCO L H, MILLER F G. Unsteady-state pressure distribution created by a directionally drilled well. Journal of Petroleum Technology, 1975(11):1392-1400.
[1] XIAO Boya. Characteristics and favorable zone distribution of tuff reservoirt of Cretaceous in A’nan sag，Erlian Basin [J]. Lithologic Reservoirs, 2024, 36(6): 135-148.
[2] ZHONG Huiying, YU Chengzhi, SHEN Wenxia, BI Yongbin, YI Ran, NI Haoming. Characteristics of fracture interference between horizontal wells in tight reservoirs considering threshold pressure gradient [J]. Lithologic Reservoirs, 2024, 36(3): 172-179.
[3] ZHANG Wenbo, LI Ya, YANG Tian, PENG Siqiao, CAI Laixing, REN Qiqiang. Characteristics and diagenetic evolution of Permian pyroclastic reservoirs in Jianyang area，Sichuan Basin [J]. Lithologic Reservoirs, 2024, 36(2): 136-146.
[4] DAI Bo, WANG Leifei, ZHUANG Jian, YUAN Weibin, WANG Xuesheng. Experiment of minimum miscible pressure of CO2 flooding in ultra-low permeability reservoir [J]. Lithologic Reservoirs, 2020, 32(2): 129-133.
[5] LI Wei, LIU Ping, AI Nengping, SHAO Yuan, HOU Jingxian. Development characteristics and genetic mechanism of mid-deep reservoirs in Ledong area,Yinggehai Basin [J]. Lithologic Reservoirs, 2020, 32(1): 19-26.
[6] ZHANG Yichao, CHEN Minfeng, QU Dan, MAO Meifen, YANG Ziyou. Prediction method of well pattern infilling effect for ultra-low permeability reservoir in X oilfield [J]. Lithologic Reservoirs, 2020, 32(1): 144-151.
[7] JIANG Tingxue, WANG Haitao, BIAN Xiaobing, LI Hongchun, LIU Jiankun, WU Chunfang, ZHOU Linbo. Volume fracturing technology for horizontal well and its application [J]. Lithologic Reservoirs, 2018, 30(3): 1-11.
[8] LIAO Mingguang, GUO Yunfei, YAO Jingli, LIAO Jijia, NAN Junxiang. Pore throat structure characteristics of Chang 31 reservoir in HuachiHeshui area, Ordos Basin [J]. Lithologic Reservoirs, 2018, 30(3): 17-26.
[9] YIN Daiyin, XIANG Junhui, WANG Dongqi. Classification of Fuyang oil reservoir with ultra-low permeability around placanticline of Daqing Oilfield [J]. Lithologic Reservoirs, 2018, 30(1): 150-154.
[10] LI Youquan, HAN Xiuhong, YAN Yan, ZHANG Dezhi, ZHOU Zhiwei, MENG Fankun. Pressure transient analysis on CO2 huff and puff in low permeability reservoir [J]. Lithologic Reservoirs, 2017, 29(6): 119-127.
[11] ZHAO Xisen, DANG Hailong, PANG Zhenyu, SHI Pitong, CAO Shang, DING Lei, BAI Pu. Microscopic pore structure and seepage characteristics of different pore assemblage types in ultra low permeability reservoir:a case of Chang 6 reservoir in Tang 157 well area,Ganguyi Oilfield [J]. Lithologic Reservoirs, 2017, 29(6): 8-14.
[12] CHEN Mingqiang, WANG Ning, ZHANG Yang, REN Long. Productivity prediction method of shallow reservoir inWeibei Oilfield [J]. Lithologic Reservoirs, 2017, 29(5): 134-139.
[13] PANG Xiaojun, DAI Liming, WANG Qingbin, LIU Shilei, FENG Chong. Characteristics and controlling factors of low permeability reservoirs of the third member of Dongying Formation in northwestern margin of Bozhong Sag [J]. Lithologic Reservoirs, 2017, 29(5): 76-88.
[14] LIU Chen, WANG Kai, WANG Yefei, ZHOU Wensheng. Polymer/surfactant binary flooding in A oilfield with high temperature and high salinity [J]. Lithologic Reservoirs, 2017, 29(3): 152-158.
[15] DENG Xuefeng. Optimization of reasonable production pressure difference of fractured horizontal well in low permeability tight reservoirs [J]. Lithologic Reservoirs, 2017, 29(1): 135-139.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] DUAN Tianxiang,LIU Xiaomei,ZHANG Yajun,XIAO Shuqin. Discussion on geologic modeling with Petrel[J]. Lithologic Reservoirs, 2007, 19(2): 102 -107 .
[2] ZHANG Liqiu. Optimization of upward strata combination of second class oil layer in eastern south Ⅱ area of Daqing Oilfield[J]. Lithologic Reservoirs, 2007, 19(4): 116 -120 .
[3] ZHANG Di，HOU Zhongjian，WANG Yahui，WANG Ying，WANG Chunlian. Sedimentary characteristics of lacustrine carbonate rocks of the first member of Shahejie Formation in Banqiao-Beidagang area[J]. Lithologic Reservoirs, 2008, 20(4): 92 -97 .
[4] FAN Huaicai， LI Xiaoping， DOU Tiancai， WU Xinyuan. Study on stress sensitivity effect on flow dynamic features of gas wells[J]. Lithologic Reservoirs, 2010, 22(4): 130 -134 .
[5] TIAN Shufang，ZHANG Hongwen. Application of life cycle theory to predict increasing trend of proved oil reserves in Liaohe Oilfield[J]. Lithologic Reservoirs, 2010, 22(1): 98 -100 .
[6] YANG Kai，GUO Xiao. Numerical simulation study of three-dimensional two-phase black oil model in fractured low permeability reservoirs[J]. Lithologic Reservoirs, 2009, 21(3): 118 -121 .
[7] ZHAI Zhongxi， QINWeijun， GUO Jinrui. Quantitative relations between oil-gas filling degree and channel seepage flow capacity of the reservoir：Example of Shuanghe Oilfield in Biyang Depression[J]. Lithologic Reservoirs, 2009, 21(4): 92 -95 .
[8] QI Minghui，LU Zhengyuan，YUAN Shuai，LI Xinhua. The analysis on the sources of water body and characteristic of water breakthough at Block 12 in Tahe Oilfield[J]. Lithologic Reservoirs, 2009, 21(4): 115 -119 .
[9] LI Xiangbo,CHEN Qi,lin,LIU Huaqing,WAN Yanrong,MU Jingkui,LIAO Jianbo,WEI Lihua. Three types of sediment gravity flows and their petroliferous features of Yanchang Formation in Ordos Basin[J]. Lithologic Reservoirs, 2010, 22(3): 16 -21 .
[10] LIU Yun，LU Yuan，YI Xiangyi， ZHANG Junliang， ZHANG Jinliang，WANG Zhenxi. Gas hydrate forecasting model and its influencing factors[J]. Lithologic Reservoirs, 2010, 22(3): 124 -127 .
TRENDMD:

Copyright © 2018 Lithologic Reservoirs

Support by Beijing Magtech support@magtech.com.cn