改进的压力衰竭法测试页岩孔渗参数

doi:10.13809/j.cnki.cn32-1825/te.2020.01.008

Abstract

Abstract:

The permeability of unconventional reservoirs is low, such as shale gas, coal-bed methane and tight gas. It is difficult to measure the permeability by the conventional method. Therefore, a method using the improved pressure depletion to measure the porosity and permeability of tight rock is proposed. The principle is to use a smaller volume gas container with a high pressure applied to one end of the rock sample and then record the process of pressure depletion. According to the variation of pressure with time, calculate the permeability and porosity of core. Therefore, the test principle is analyzed and the computational model for porosity and permeability is established, the pressure depletion rule of the typical compact shale rock samples is tested, and the effects of different factors（gas composition, temperature, confining pressure and displacement pressure） on pressure depletion and permeability are studied. The permeability values of a shale sample under different test conditions are calculated according to the experimental results. Permeability calculation results show that the permeability decreases with the increase of temperature or confining pressure, which prove that the temperature and confining pressure have important effects on permeability measurement results. Compared with the field test results, it is found that the permeability test results are consistent with it, indicating that the experimental method is reliable.

Key words: tight rock, permeability, porosity, pressure depletion method, influencing factors

CLC Number:

TE122

Jianhua REN,Bi LU,Shaoran REN. Improved pressure depletion method measure the porosity and permeability of shale[J]. Reservoir Evaluation and Development, 2020, 10(1): 49-55.

Figures/Tables 10

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Table 1

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References 22

[1]	王曦蒙, 刘洛夫, 汪洋 , 等. 川南地区龙马溪组页岩高压甲烷等温吸附特征[J]. 天然气工业, 2019,39(12):32-39.
	WANG X M, LIU L F, WANG Y , et al. High-pressure isothermal methane adsorption characteristic of Longmaxi Formation shale in the southern Sichuan Basin[J]. Natural Gas Industry, 2019,39(12):32-39.
[2]	李凯, 孟志勇, 吉婧 , 等. 四川盆地涪陵地区五峰—龙马溪组解吸气特征及影响因素分析[J]. 石油实验地质, 2018,40(1):90-96.
	LI K, MENG Z Y, JI J , et al. Characteristics and influencing factors of desorption gas in Wufeng-Longmaxi formations in Fuling area, Sichuan Basin[J]. Petroleum Geology & Experiment, 2018,40(1):90-96.
[3]	朱汉卿, 贾爱林, 位云生 , 等. 低温氩气吸附实验在页岩储层微观孔隙结构表征中的应用[J]. 石油实验地质, 2018,40(4):559-565.
	ZHU H Q, JIA A L, WEI Y S , et al. Microscopic pore structure characteristics of shale reservoir based on low-temperature argon adsorption experiments[J]. Petroleum Geology & Experiment, 2018,40(4):559-565.
[4]	尹丛彬 . 页岩压裂裂缝渗透率的测试与分析[J]. 天然气工业, 2018,38(3):60-68.
	YIN C B . Test and analysis on the permeability of fractured fractures in shale reservoirs[J]. Natural Gas Industry, 2018,38(3):60-68.
[5]	欧阳云丽, 汪伟英, 杨林江 , 等. 特低渗透率的测定方法综述[J]. 石油化工应用, 2012,31(5):1-3.
	OUYANG Y L, WANG W Y, YANG L J , et al. Summarizing the measuring methods of ultra-low permeability[J]. Petrochemical Industry Application, 2012,31(5):1-3.
[6]	陈思宇, 田华, 柳少波 , 等. 致密储层样品体积测量对孔隙度误差的影响[J]. 石油实验地质, 2016,38(6):850-856.
	CHEN S Y, TIAN H, LIU S B , et al. Influence of bulk volume measurement on porosity error in tight reservoir core plug analysis[J]. Petroleum Geology & Experiment, 2016,38(6):850-856.
[7]	赵立翠, 王珊珊, 高旺来 , 等. 页岩储层渗透率测量方法研究进展[J]. 断块油气田, 2013,20(6):763-767.
	ZHAO L C, WANG S S, GAO W L , et al. Research progress in permeability measurement method of shale gas reservoir[J]. Fault-Block Oil and Gas Field, 2013,20(6):763-767.
[8]	任世杰, 刘大鹏 . 页岩应力敏感性分析研究[J]. 非常规油气, 2019,6(1):51-54.
	REN S J, LIU D P . Study of the shale stress sensitivity experimental[J]. Unconventional Oil & Gas, 2019,6(1):51-54.
[9]	梁冰, 高红梅, 兰永伟 . 岩石渗透率与温度关系的理论分析和试验研究[J]. 岩石力学与工程学报, 2005,24(12):2009-2012.
	LIANG B, GAO H M, LAN Y W . Thermal analysis and experimental study on relation between rock permeability and temperature[J]. Chinese Journal of Rock Mechanics and Engineering, 2005,24(12):2009-2012.
[10]	刘均荣, 秦积舜, 吴晓东 . 温度对岩石渗透率影响的实验研究[J]. 石油大学学报, 2001,25(4):51-53.
	LIU J R, QIN J S, WU X D . Experimental study on relation between temperature and rock permeability[J]. Journal of the University of Petroleum, China(Edition of Natural Science), 2001,25(4):51-53.
[11]	贺玉龙, 杨立中 . 温度和有效应力对砂岩渗透率的影响机理研究[J]. 岩石力学与工程学报, 2005,24(12):2420-2427.
	HE Y L, YANG L Z . Mechanism of effects of temperature and effective stress on permeability of sandstone[J]. Chinese Journal of Rock Mechanics and Engineering, 2005,24(12):2420-2427.
[12]	郝振良, 马捷, 王明育 . 热应力作用下的有效应力对多孔介质渗透系数的影响[J]. 水动力学研究与进展, 2003,18(6):792-796.
	HAO Z L, MA J, WANG M Y . A Influence of effective stress on the coefficient of permeability of porous medium under thermal stress[J]. Journal of Hydrodynamics, 2003,18(6):792-796.
[13]	秦积舜, 李爱芬 . 油层物理学[M]. 东营: 中国石油大学出版社, 2006: 128-133.
	QIN J S, LI A F. Petrophysics[M]. Dongying: China University of Petroleum Press, 2006: 128-133.
[14]	ECONOMIDES M J, Martin T. Modern fracturing: Enhancing natural gas production[M]. Houston: ET Publishing, 2007: 35-36.
[15]	BAHADORI A, MOKHATAB S, TOWLER B F . Rapidly estimating natural gas compressibility factor[J]. Journal of Natural Gas Chemistry, 2007,16(4):349-353.
[16]	任建华 . 煤层气井产能预测及提高产能方法研究[D]. 青岛:中国石油大学(华东), 2014.
	REN J H . Productivity prediction and enhanced gas recovery methods for coalbed methane well[D]. Qingdao: China University of Petroleum(East China), 2014.
[17]	BRACE W F, WALSH J B, FRANGOS W T . Permeability of granite under high pressure[J]. Journal of Geophysical Research, 1968,73(6):2225-2236.
[18]	李东, 郝静远 . 变温变压下煤岩甲烷吸附变化量的研究——以陕西韩城下峪口煤为例[J]. 非常规油气, 2017,4(2):8-12.
	LI D, HAO J Y . Study on methane adsorption variation of coal under variable temperature and pressure--A case study of Xiayukou Coal in Hancheng, Shaanxi Province[J]. Unconventional Oil & Gas, 2017,4(2):8-12.
[19]	李东, 郝静远, 孙晨光 , 等. 变温变压下页岩与煤岩吸附量变化的比较研究——以ALUM页岩与崔家沟7号煤为例[J]. 非常规油气, 2018,5(1):61-65.
	LI D, HAO J Y, SUN C G , et al. Comparison study of methane adsorption behavior between shale and coal seam under variation temperature and pressure--Taking ALUM Shale and Cuijiagou 7# Coal as examples[J]. Unconventional Oil & Gas, 2018,5(1):61-65.
[20]	李志强, 鲜学福, 隆晴明 . 不同温度应力条件下煤体渗透率实验研究[J]. 中国矿业大学学报, 2009,38(4):523-527.
	LI Z Q, XIAN X F, LONG Q M . Experiment study of coal permeability under different temperature and stress[J]. Journal of China University of Mining & Technology, 2009,38(4):523-527.
[21]	薛永超, 程林松 . 微裂缝低渗透岩石渗透率随围压变化实验研究[J]. 石油实验地质, 2007,29(1):108-110.
	XUE Y C, CHENG L S . Experimental study on permeability variation with confining pressure in micro-fracture and low-permeability rock[J]. Petroleum Geology & Experiment, 2007,29(1):108-110.
[22]	任建华 . 微注入压降测试在页岩气储层评价中的应用[J]. 科学技术与工程, 2018,18(30):65-69.
	REN J H . Application of pre-frac injection falloff diagnostic test in the evaluation of shale gas reservoir[J]. Science Technology and Engineering, 2018,18(30):65-69.

测试气体	渗透率/10^-3μm²
	温度/℃（围压17.5 MPa）			围压/MPa（温度50 ℃）
	40	50	60	17.5	20.0	23.5
CH₄	4.26	2.73	1.63	2.73	1.45	0.93
N₂	2.11	1.24	0.61	1.24	0.73	0.49

Improved pressure depletion method measure the porosity and permeability of shale

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