井中微地震监测技术在平桥南页岩气区块应用效果分析

doi:10.13809/j.cnki.cn32-1825/te.2020.01.007

摘要/Abstract

摘要：

如何准确描述水平井水力压裂裂缝展布状态、储层改造体积、造缝主控因素是页岩气开发中一项关键技术。采用在邻井JY×-2中下放高精度检波器的方式对平桥南JY×-1页岩气井第10至15压裂段进行井中微地震监测。根据监测结果描述每段压裂施工的裂缝发育过程,分析6段压裂后裂缝的分布特征：主要以人工裂缝为主,半缝长250 m,宽210 m,高85 m;储层改造体积2 187×10 ⁴ m ³,单段压裂区域有一定重合;主裂缝方向为北西60°,与最大主应力方向基本一致;压裂屏障是裂缝不对称发育的主控因素。结合三维地震曲率属性分析认为,储层内的天然闭合裂缝是压裂微裂缝延伸的屏障,影响压裂微裂缝延伸方向和长度的同时也会导致施工压力升高。

关键词: 平桥南页岩气, 微地震监测, 水平井水力压裂, 压裂屏障, 压裂微裂缝

Abstract:

How to accurately describe the distribution state of fractures formed by hydraulic fracturing in horizontal wells, the volume of reservoir transformation and the main control factors of fracture formation is one of the key technologies in shale gas development. Microseismic monitoring in the 10th to 15th fracturing section of shale gas well JY×-1 in the south of Pingqiao is carried out by means of devolving high precision geophone in adjacent well JY×-2. According to the monitoring results, the fracture development of each section of fracturing is described, and the distribution characteristics of fractures in six sections after fracturing. The main fractures are artificial fractures, whose half length is 250 m, width is 210 m, and height is 85 m. The stimulated reservoir volume（SRV） is 2 187×10 ⁴ m ³. There is a certain coincidence in the single fracturing section. The main fracture direction is 60° north of east, which is basically consistent with the direction of the maximum principal stress. Fracturing barrier is the main factor of fracture asymmetry development. Combined with the analysis of 3D seismic curvature attribute, it is considered that the natural closed fracture in the reservoir is the barrier of micro-fracture extension, which affects the extension direction and length of micro-fracture, and also leads to the increase of construction pressure.

Key words: shale gas of the southern part of Pingqiao, microseismic monitoring, hydraulic fracturing of horizontal well, fracturing barrier, microfracture by fracturing

中图分类号:

TE357

黄小贞,谷红陶. 井中微地震监测技术在平桥南页岩气区块应用效果分析[J]. 油气藏评价与开发, 2020, 10(1): 43-48.

HUANG Xiaozhen,GU Hongtao. Microseismic monitoring technology of shale gas block in the southern part of Pingqiao[J]. Reservoir Evaluation and Development, 2020, 10(1): 43-48.

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参考文献 18

[1]	王海华, 田黔宁 . 微地震监测技术在非常规能源勘探开发中的应用及发展前景[C]// 中国石油学会.2015年物探技术研讨会论文集,涿州, 2015: 755-758.
	WANG H H, TIAN Q N. Application and prospects of microseismic montitoring technology for unconventional resource E&P[C]// Proceedings of the symposium on geophysical techniques, 2015,Zhuozhou:755-758.
[2]	刘建中, 王春耘, 刘继民 , 等. 用微地震法监测油田生产动态[J]. 石油勘探与开发, 2004,31(2):71-73.
	LIU J Z, WANG C Y, LIU J M , et al. Micro-seismic monitor on the operation of oil fields[J]. Petroleum Exploration and Development, 2004,31(2):71-73.
[3]	李大军, 杨晓, 王小兰 , 等. 四川盆地W地区龙马溪组页岩气压裂效果评估和产能预测研究[J]. 石油物探, 2017,56(5):735-745.
	LI D J, YANG X, WANG X L , et al. Estimating the fracturing effect and production capacity of the Longmaxi Formation of the Lower Silurian in area W, Sichuan Basin[J]. Geophysical Prospecting for Petroleum, 2017,56(5):735-745.
[4]	刘博, 梁雪莉, 容娇君 , 等. 非常规油气层压裂微地震监测技术与应用[J]. 石油地质与工程, 2016,30(1):142-145
	LIU B, LIANG X L, RONG J J , et al. Microseismic monitoring technology and application of unconventional reservoir fracturing[J]. Petroleum Geology and Engineering, 2016,30(1):142-145.
[5]	范天佑 . 断裂理论基础[M]. 北京: 科学出版社, 2003.
	FAN T Y. Theoretical basis of fracture[M]. Beijing: Science Press, 2003.
[6]	毛庆辉, 陈传仁, 桂志先 , 等. 水力压裂微震监测中速度模型研究[J]. 工程地球物理学报, 2012,9(6):708-711.
	MAO Q H, CHEN C R, GUI Z X , et al. Research on velocity model in hydro-fracturing microseismic monitoring[J]. Chinese Journal of Engineering Geophysics, 2012,9(6):708-711.
[7]	邵尚奇, 陈凯, 丁文刚 , 等. 水力裂缝周围应力场解析模型及应力扰动分析[J]. 石油机械, 2018,46(2):108-114.
	SHAO S Q, CHEN K, DING W G , et al. Stress field analytic model and stress perturbation analysis around hydraulic cracks[J]. China Petroleum Machinery, 2018,46(2):108-114.
[8]	崔庆辉, 尹成, 刁瑞 , 等. 地面微地震监测数据处理难点及对策[J]. 油气藏评价与开发, 2017,7(1):7-13.
	CUI Q H, YIN C, DIAO R , et al. Difficulties and countermeasure of surface microseismic monitoring data processing[J]. Reservoir Evaluation and Development, 2017,7(1):7-13.
[9]	李宏, 杨心超, 朱海波 , 等. 水力压裂微地震震源定位与震源机制联合反演研究[J]. 石油物探, 2018,58(2):312-320.
	LI H, YANG X C, ZHU H B , et al. Joint inversion of source location and microseismic focal mechanism[J]. Geophysical Prospecting for Petroleum, 2018,58(2):312-320.
[10]	缪思钰, 张海江, 陈余宽 , 等. 基于微地震定位和速度成像的页岩气水力压裂地面微地震监[J]. 石油物探, 2019,58(4):262-271.
	MIAO S Y, ZHANG H J, CHEN Y K , et al. Surface microseismic monitoring of shale gas hydraulic fracturing based on microseismic location and tomograp[J]. Geophysical Prospecting for Petroleum, 2019,58(4):262-271.
[11]	GUTENBERG B, RICHTER C F. Seismicity of the Earth and associated phenomena[M]. Princeton: Princeton University Press, 1954: 17-19.
[12]	MAXWELL S C, JONES M, PARKER R , et al. Fault activation during hydraulic fracturing[C]// paper SEG-2009-1552 presented at the 2009 SEG Annual Meeting, 25-30 October 2009, Houston, Texas, USA.
[13]	杨瑞召, 赵争光, 王占刚 , 等. 页岩气开发微地震技术[M]. 上海: 华东理工大学出版社, 2017.
	YANG R Z, ZHAO Z G, WANG Z G , et al. Microseismic technology for shale gas development[M]. Shanghai: East China University of Science and Technology Press, 2017
[14]	毛庆辉, 王彦春, 王鹏等. 改进的微震事件反演重定位方法及其应用[J]. 石油物探, 2015,54(3):359-366.
	MAO Q H, WANG Y C, WANG P , et al. The improved microseismic event relocation method and its application[J]. Geophysical Prospecting for Petroleum, 2015,54(3):359-366.
[15]	谢宋雷, 桂志先, 赵成 , 等. 水力压裂诱生微震资料处理方法[J]. 石油天然气学报, 2009,31(4):81-82.
	XIE S L, GUI Z X, ZHAO C , et al. Processing methods of data from microseism induced by hydraulic fractures[J]. Journal of Oil and Gas Technology, 2009,31(4):81-82.
[16]	NELSON R A. Geologic analysis of naturally fractured reservoirs[M]. Oxford: Gulf Professional Publishing, 2001.
[17]	刘喜武, 刘宇巍, 刘志远 , 等. 页岩层系天然裂缝地震预测技术研究[J]. 石油物探, 2018,58(4):611-617.
	LIU X W, LIU Y W, LIU Z Y , et al. Seismic prediction of natural fractures in series of shale oil reservoirs[J]. Geophysical Prospecting for Petroleum, 2018,58(4):611-617.
[18]	MAXWELL S C, CIPOLLA C L. What does microseismicity tell us about hydraulic fracturing [C]// paper SPE-146932-MS presented at the SPE Annual Technical Conference and Exhibition, 30 October-2 November 2011, Denver, Colorado, USA.

检波器序号	深度/m	检波器序号	深度/m
1	2 170	6	2 325
2	2 201	7	2 357
3	2 232	8	2 388
4	2 263	9	2 419
5	2 294	10	2 450

段数	半缝长/ m	缝宽/ m	缝高/ m	主裂缝方向	次裂缝方向	施工液量/ m³	施工排量/ （m³·min^-1）
10	250	180	90	北西60°	N/A	2 056	14.0~16.5
11	260	230	100	北西60°	N/A	2 097	15.0~17.0
12	280	195	120	北西60°	N/A	2 092	12.0~15.5
13	255	210	80	北西60°	N/A	1 937	16.5~17.0
14	270	270	60	北西60°	北东60°	2 228	13.0~15.5
15	225	190	70	北西60°	北东60°	1 929	13.0~16.0
平均	256.67	212.50	86.67	N/A	N/A

段数	西侧缝长/ m	东侧缝长/ m	半缝长/ m	缝宽/ m	FCI
10	400	100	250	180	0.36
11	320	200	260	230	0.44
12	410	150	280	195	0.35
13	360	150	255	210	0.41
14	400	140	270	270	0.50
15	330	120	225	190	0.42

段数	半缝长/m	缝宽/m	缝高/m	SRV/10⁴ m³
10	250	180	90	564
11	260	230	100	516
12	280	195	120	428
13	255	210	80	398
14	270	270	60	374
15	225	190	70	329
平均	256.67	212.50	86.67	434.80