水—岩作用对富有机质页岩应力敏感性的影响——以渝东南地区龙马溪组页岩为例

Abstract

Abstract:

The production of shale gas is a complex and multiscale process that spans a variety of scales and goes through a variety of mass transfer mode. The stress sensitivity of each path has an important influence on the mass transfer of shale gas. Especially when a large amount of fracturing fluid retained in shale reservoir, water-rock interactions will inevitably affect shale stress sensitivity. Taking Longmaxi Formation shale in the southeast area of Chongqing as the research object, stress sensitivity experiments of shale before and after water-rock interactions are carried out, which characterize the change characteristics of fracture surface properties before and after stress sensitivity experiments, and analyze the action mechanisms of water-rock interaction on the fracture surface. It is found that, the stress sensitivity of fractured shale containing proppants is weak, and the existence of proppants reduce the stress sensitivity of shale. The wider the crack width is, the stronger the stress sensitivity will be. The stress sensitivity of shale after water-rock interaction is from high to low in the following order: alkali sensitivity>salt sensitivity with reduced salinity>water sensitivity. In the process of salt sensitivity and water sensitivity with reduced salinity, clay minerals hydrate and expand, and particles migrate, resulting in smoother fracture surfaces. However, the alkali-sensitive process, the fluid not only hydrates with the fracture surface, but also causes the alkali erosion, which strengthens the shale stress sensitivity. The stress sensitivity of fracture shale containing proppant is weakened, and the embedding and crushing of propelling agent is the main cause of stress sensitivity. The optimal selection and reasonable laying of propelling agent is the key to reduce the stress sensitivity.

Key words: pore structure, nature of fracture surface, water-rock interaction, stress sensitivity, shale

CLC Number:

TE312

KANG Yili,BAI Jiajia,LI Xiangchen,CHEN Mingjun,YOU Lijun,LI Xinlei,LI Qing,FANG Dazhi. Influence of water-rock interaction on stress sensitivity of organic-rich shales: A case study from Longmaxi formation in the southeast area of Chongqing[J].Reservoir Evaluation and Development, 2019, 9(5): 54-62.

Figures/Tables 13

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References 21

[1]	杨怀成, 毛国扬, 宋其仓 , 等. 彭页HF-1井页岩气藏大型压裂工艺技术[J]. 西南石油大学学报(自然科学版), 2014,36(5):117-122. doi: 10.11885/j.issn.1674-5086.2012.08.30.04
[2]	卢拥军, 王海燕, 管保山 , 等. 海相页岩压裂液低返排率成因[J]. 天然气工业, 2017,37(7):46-51.
[3]	田巍, 邓瑞健, 朱维耀 , 等. 页岩压裂缝网储层应力敏感性及对产能的影响[J]. 油气藏评价与开发, 2017,7(6):71-77.
[4]	张睿, 宁正福, 杨峰 , 等. 页岩应力敏感实验与机理[J]. 石油学报, 2015,36(2):224-231.
[5]	肖文联, 任席瑶, 赵金洲 , 等. 双组份裂缝岩石非线性有效应力模型研究[J]. 地球物理学报, 2018,61(12):5034-5043.
[6]	游利军, 王巧智, 康毅力 , 等. 压裂液浸润对页岩储层应力敏感性的影响[J]. 油气地质与采收率, 2014,21(6):102-106.
[7]	曹耐, 雷刚 . 致密储集层加压—卸压过程应力敏感性[J]. 石油勘探与开发, 2019,46(1):132-138.
[8]	朱维耀, 马东旭 . 页岩储层有效应力特征及其对产能的影响[J]. 天然气地球科学, 2018,29(6):845-852.
[9]	DONG J J, HSU J Y, WU W J , et al. Stress-dependence of the permeability and porosity of sandstone and shale from TCDP Hole-A[J]. International Journal of Rock Mechanics and Mining Sciences, 2010,47(7):1141-1157. doi: 10.1016/j.ijrmms.2010.06.019
[10]	康毅力, 林冲, 游利军 , 等. 油基钻井完井液侵入对页岩储层应力敏感性的影响[J]. 天然气工业, 2015,35(6):64-69.
[11]	游利军, 程秋洋, 康毅力 , 等. 氧化液作用下富有机质页岩裂缝应力敏感性[J]. 油气地质与采收率, 2018,25(4):79-85.
[12]	何金钢, 康毅力, 游利军 , 等. 流体损害对页岩储层应力敏感性的影响[J]. 天然气地球科学, 2011,22(5):915-919.
[13]	张鹏, 李宁, 陈新民 . 一种新的裂隙三维表面粗糙度表征方法[J]. 岩石力学与工程学报, 2009,28(S2):3477-3483.
[14]	HE C, WANG X H, LIU W S , et al. Microfiltration in recycling of marcellus shale flowback water: Solids removal and potential fouling of polymeric microfiltration membranes[J]. Journal of Membrane Science, 2014,462:88-95.
[15]	陈强 . 基于高分辨率成像技术的页岩孔隙结构表征[D]. 成都:西南石油大学, 2014.
[16]	BAI J J, KANG Y L, CHEN M J , et al. Investigation of multi-gas transport behavior in shales via a pressure pulse method[J]. Chemical Engineering Journal, 2019,360:1667-1677.
[17]	WU K L, CHEN Z X, LI X F . Real gas transport through nanopores of varying cross-section type and shape in shale gas reservoirs[J]. Chemical Engineering Journal, 2015,281:813-825.
[18]	俞杨烽, 康毅力, 游利军 . 水膜厚度变化——特低渗透砂岩储层盐敏性的新机理[J]. 重庆大学学报, 2011,34(4):67-71.
[19]	YOU L J, CHENG Q Y, KANG Y L , et al. Imbibition of oxidative fluid into organic-rich shale: Implication for oxidizing stimulation[J]. Energy & Fuels, 2018,32(10):10457-10468.
[20]	刘向君, 熊健, 梁利喜 . 龙马溪组硬脆性页岩水化实验研究[J]. 西南石油大学学报(自然科学版), 2016,38(3):178-186.
[21]	游利军, 康毅力, 陈强 , 等. 氧化爆裂提高页岩气采收率的前景[J]. 天然气工业, 2017,37(5):53-61.

样品编号	深度/ m	全岩分析/%							TOC/ %	样品处理方式
样品编号	深度/ m	石英	钾长石	斜长石	方解石	白云石	黄铁矿	黏土矿物	TOC/ %	样品处理方式
A-1	2 823.47	56.9	2.5	6.8	3.5	4.5	4.7	21.1	4.69	干样应力加载—卸载—干样铺砂后应力加载—卸载
A-2	2 824.52	60.6	2.4	6.4	2.3	5.2	3.0	20.1	4.81	干样应力加载—卸载—碱敏实验后应力加载
A-3	2 825.35	61.9	2.1	5.6	3.3	3.9	2.9	20.3	4.76	干样应力加载—卸载—干燥铺砂后应力加载—卸载
A-4	2 826.35	62.9	1.6	5.8	2.6	4.2	2.5	20.4	4.72	干样应力加载—卸载—盐敏实验后应力加载
A-5	2 827.46	60.6	2.3	5.4	3.0	3.7	3.5	21.5	5.01	干样应力加载—卸载—水敏后应力加载
A-6	2 828.45	59.7	2.1	6.4	3.4	3.8	4.1	20.5	5.40	压裂液浸泡后应力加载—卸载
A-7	2 829.60	65.2	2.3	3.7	2.1	2.7	2.7	21.3	5.68	压裂液浸泡后应力加载—卸载

样品编号	井深/m	黏土矿物含量/%			伊/蒙间层比（S）/%
样品编号	井深/m	伊利石	绿泥石	伊/蒙间层	伊/蒙间层比（S）/%
A-1	2 823.47	44	2	54	10
A-5	2 827.46	48	3	49	10

施加的有效应力/MPa	裂缝渗透率/10^-3 μm²
施加的有效应力/MPa	A-1	A-2	A-3	A-4	A-5
3	0.94	1.77	3.75	10.48	27.20
10	0.60	0.64	1.48	3.88	8.16
20	0.38	0.31	0.69	0.84	1.52
50	0.29	0.20	0.29	0.17	0.16
S_s	0.28	0.48	0.51	0.62	0.68
应力敏感程度	弱	中等偏弱	中等偏强	中等偏强	中等偏强

样品编号	应力敏感实验前		应力敏感实验后
样品编号	上裂缝面微凸体中值高度	下裂缝面微凸体中值高度	上裂缝面微凸体中值高度	下裂缝面微凸体中值高度
A-1	2.8	2.1	2.4	1.6
A-2	6.1	4.2	5.2	3.8
A-3	1.5	1.8	1.1	0.9
A-4	1.7	2.3	1.4	2.0
A-5	2.3	1.7	1.6	1.5

样品编号	实验前		实验后
样品编号	粗糙度系数	裂缝倾角θ_s/ （°）	粗糙度系数	裂缝倾角θ_s/（°）
A-1	58.12	28.98	53.37	24.68
A-2	58.07	30.95	55.81	24.73
A-3	59.45	31.47	54.04	24.75
A-4	64.08	28.22	56.29	26.14
A-5	54.83	26.49	52.46	24.20
平均值	58.91	29.22	54.39	24.90

Influence of water-rock interaction on stress sensitivity of organic-rich shales: A case study from Longmaxi formation in the southeast area of Chongqing

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References 21

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有效应力/ MPa	裂缝渗透率/10^-3 μm²
有效应力/ MPa	A-5水敏实验后	A-4盐敏实验后	A-2碱敏实验后
3	13.11	8.20	1.18
10	3.28	1.59	0.11
20	0.52	0.25	0.02
50	0.08	0.10	0.01
S_S	0.71	0.73	0.82
应力敏感程度	中等偏强	中等偏强	强

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