Study on erosion characteristics of valve sleeve blowdown valve of shale gas separator

doi:10.16265/j.cnki.issn1003-3033.2024.05.0364

Abstract

Abstract:

To solve the problem of severe erosion caused by sand particles passing through separators during shale gas extraction, a well in Changning Shale Gas Field was taken as an example. Based on FLUENT software, numerical simulation was used to simulate the erosion characteristics of sand particles on the drain valve under different speeds, sand content, particle size, shape coefficient and valve opening. The main factors affecting the erosion characteristics of the drain valve were evaluated to clarify the erosion situation of the drain valve. The results indicate that the erosion damage of the valve disc and throttle hole is the main reason for the failure of the sewage valve. As the valve opening decreases, the pressure difference inside the valve increases exponentially, and the flow velocity is the largest at the valve disc and throttle hole. With the decrease of shape coefficient of sand particles, the erosion of the valve is more severe. Based on sensitivity analysis, the degree of influence of various factors on valve erosion characteristics is: ξ_l (Speed)=0.73, ξ_m (Sand particle size)=0.71, ξ_n (Sand content)=0.70 and ξ_q (Shape coefficient)=0.67. Therefore, it is recommended to control the fluid flow rate to within 7 m/s by increasing the internal flow area of the valve, improving the sand removal ability of the desander, and preventing larger sand particles (sand particle size>60 μm) from entering the sewage valve. The sand particle size entering the sewage valve should be controlled within 60 μm, which provides an effective means for the evaluation and optimization of on-site equipment.

Key words: shale gas, separator, valve sleeve type drain valve, erosion characteristics, numerical simulation

CLC Number:

X924.4安全控制技术

LIU Enbin, LI Xi, KOU Bo, JIANG Jun, LI Dangjian. Study on erosion characteristics of valve sleeve blowdown valve of shale gas separator[J]. China Safety Science Journal, 2024, 34(5): 52-60.

Figures/Tables 14

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Table 1

References 20

[1]	周守为, 朱军龙, 单彤文, 等. 中国天然气及LNG产业的发展现状及展望[J]. 中国海上油气, 2022, 34(1):1-8.
	ZHOU Shouwei, ZHU Junlong, SHAN Tongwen, et al. Development status and prospects of China's natural gas and LNG industry[J]. China Offshore Oil and Gas, 2022, 34(1):1-8.
[2]	贾进章, 王东明, 李斌. 水力压裂有效压裂半径的影响因素研究[J]. 中国安全生产科学技术, 2022, 18(6):58-64.
	JIA Jinzhang, WANG Dongming, LI Bin. Study on influencing factors of effective fracturing radius of hydraulic fracturing[J]. Journal of Safety Science and Technology, 2022, 18(6):58-64.
[3]	谢明, 唐永帆, 宋彬, 等. 页岩气集输系统的腐蚀评价与控制:以长宁-威远国家级页岩气示范区为例[J]. 天然气工业, 2020, 40(11):127-134.
	XIE Ming, TANG Yongfan, SONG Bin, et al. Corrosion evaluation and control of a shale gas gathering and transportation system: a case study of the Changning-Weiyuan national shale gas demonstration area[J]. Natural Gas Industry, 2020, 40(11):127-134.
[4]	吴瑕, 孙浩, 宋长景. 页岩气集输站场撬装设备失效后果面积计算方法[J]. 中国安全科学学报, 2023, 33(10):120-128. doi: 10.16265/j.cnki.issn1003-3033.2023.10.1190
	WU Xia, SUN Hao, SONG Changjing. Calculation method of failure consequence area of skid-mounted equipment in gathering and transportation station of shale gas[J]. China Safety Science Journal, 2023, 33(10):120-128. doi: 10.16265/j.cnki.issn1003-3033.2023.10.1190
[5]	张鹏, 范潮海, 陈祥苏. 油气集输站场个人风险矩阵叠加分析[J]. 中国安全科学学报, 2020, 30(3):129-136. doi: 10.16265/j.cnki.issn1003-3033.2020.03.020
	ZHANG Peng, FAN Chaohai, CHEN Xiangsu. Superposition analysis of individual risk matrix of oil and gas gathering and transportation station[J]. China Safety Science Journal, 2020, 30(3):129-136. doi: 10.16265/j.cnki.issn1003-3033.2020.03.020
[6]	LIU Xingqiang, JI Hong, MIN Wei, et al. Erosion behavior and influence of solid particles in hydraulic spool valve without notches[J]. Engineering Failure Analysis, 2020,108:DOI:10.1016/j.engfailanal.2019.104262.
[7]	ZHU Hongjun, HAN Qinghua, WANG Jian, et al. Numerical investigation of the process and flow erosion of flushing oil tank with nitrogen[J]. Powder Technology, 2015,275:12-24.
[8]	钟林, 冯桂弘, 张计春, 等. 基于CFD数值模拟的排污阀冲蚀磨损影响规律[J]. 排灌机械工程学报, 2021, 39(2):151-157.
	ZHONG Lin, FENG Guihong, ZHANG Jichun, et al. Influence law of erosion wear of blowdown valve based on CFD numerical simulation[J]. Journal of Drainage and Irrigation Machinery Engineering (JDIME), 2021, 39(2):151-157.
[9]	KOU Bo, LIU Enbin, LI Dangjian, et al. Research on erosion characteristics of the sleeve-type blowdown valve in the shale gas gathering and transportation station[J]. SPE Journal, 2024, 29(1):328-345.
[10]	张程, 夏智勋, 马超, 等. 基于k-ω SST模型的同心筒发射装置流场数值模拟[J]. 航空动力学报, 2019, 34(11):2331-2338.
	ZHANG Cheng, XIA Zhixun, MA Chao, et al. Numerical simulation of flow field of concentric cylinder launcher based on k-ω SST turbulence model[J]. Journal of Aerospace Power, 2019, 34(11):2331-2 338.
[11]	LIU Enbin, LI Wensheng, CAI Hongjun, et al. Research of formation mechanism of trailing oil in product oil pipeline[J]. Processes, 2019, 7(1):7-25.
[12]	MESSA G V, MALAVASI S. The effect of sub-models and parameterizations in the simulation of abrasive jet impingement tests[J]. Wear, 2017,370:59-72.
[13]	OKA Y I, YOSHIDA T. Practical estimation of erosion damage caused by solid particle impact, part 2: mechanical properties of materials directly associated with erosion damage[C]. 15^th International Conference on Wear of Materials, 2005: 102-109.
[14]	陈浩, 徐敏, 谢亮. 保形动网格策略在CFD/CSD耦合中的应用[J]. 西北工业大学学报, 2015, 33(5):732-738.
	CHEN Hao, XU Min, XIE Liang. Application of conformal dynamic mesh strategy in CFD/CSD coupling[J]. Journal of Northwest Polytechnic University, 2015, 33(5):732-738.
[15]	郭正, 刘君, 瞿章华. 非结构动网格在三维可动边界问题中的应用[J]. 力学学报, 2003, 35(2):140-146.
	GUO Zheng, LIU Jun, QU Zhanghua. Application of unstructured moving grids to three-dimensional movable boundary problems[J]. Journal of Mechanics, 2003, 35(2):140-146.
[16]	DUARTE C A R, DE SOUZA F J. Dynamic mesh approaches for eroded shape predictions[J]. Wear, 2021,484:DOI:10.1016/j.wear.2020.203438.
[17]	DEGAND C, FARHAT C. A three-dimensional torsional spring analogy method for unstructured dynamic meshes[J]. Computers & Structures, 2002, 80(3):305-316.
[18]	孙岩, 楼一珊, 曹砚峰, 等. 基于冲蚀-动网格耦合的绕丝筛管冲蚀过程数值模拟[J]. 石油钻采工艺, 2021, 43(2):160-169.
	SUN Yan, LOU Yishan, CAO Yanfeng, et al. Numerical simulation of erosion process of wire wound sieve tube based on erosion dynamic grid coupling[J]. Petroleum Drilling and Production Process, 2021, 43(2):160-169.
[19]	赵楚凡, 米传民, 周志鹏, 等. 基于组合关联分析模型的电力人身事故关键致因链筛选[J]. 中国安全科学学报, 2022, 32(4): 99-106. doi: 10.16265/j.cnki.issn1003-3033.2022.04.015
	ZHAO Chufan, MI Chuanmin, ZHOU Zhipeng, et al. Key cause chains selection of electric personal accidents based on combinatorial association analysis model[J]. China Safety Science Journal, 2022, 32(4):99-106. doi: 10.16265/j.cnki.issn1003-3033.2022.04.015
[20]	YANG Wenching. Handbook of fluidization and fluid-particle systems[M]. New York: Marcel Dekker Inc., 2003:101-105.

方案	速度/ (m·s^-1)	砂粒质量流量/ (kg·d^-1)	颗粒粒径/ μm	形状系数	平均冲蚀速率/ (10^-3kg· s^-1·m^-2)
1	4	2	20	0.56	0.17
2		6	60	0.66	0.44
3		8	80	0.76	0.67
4		12	100	0.86	0.87
5	7	2	20	0.56	0.29
6		6	60	0.66	0.91
7		8	80	0.76	1.36
8		12	100	0.86	1.74
9	8	2	20	0.56	0.61
10		6	60	0.66	1.02
11		8	80	0.76	2.79
12		12	100	0.86	3.04
13	11	2	20	0.56	1.31
14		6	60	0.66	3.02
15		8	80	0.76	5.79
16		12	100	0.86	6.82