常压页岩气水平井低成本高密度缝网压裂技术研究

Abstract

Abstract:

With the increasing demand for energy, shale gas, as a new type of unconventional natural gas resource, has attracted more and more attention. At present, the commercial development of high pressure shale gas reservoir in China has been successfully realized, but the efficient development technology of shale in deep layer and normal pressure shale is still in the exploratory stage. The normal pressure shale reservoirs in China are mainly located in the residual syncline outside the basin. The deformation degree of structure is strong, the formation pressure coefficient is between 0.9 and 1.3, the buried depth is generally shallow, the formation energy is insufficient, and the daily production of single well after fracturing is （1~5）×10 ⁴m ³. All those problems result in the failure of commercial breakthrough so far. The fracturing technologies of high-pressure shale gas reservoirs have little effect in the process of normal-pressure shale reconstruction. Based on the difficult problems in the transformation of atmospheric shale gas wells, optimization has been carried out on many aspects such as the perforation mode, artificial fracture control and support technology, field construction technology and fracturing materials. The suitable network fracturing with high density is researched, and the multi-cluster fracture equilibrium extension and multi-scale artificial fracture network are preliminarily realized. The scheme has been tested in an normal pressure shale gas well of a certain shale gas block in southeast Chongqing, and good reconstruction effect has been obtained after fracturing.

Key words: normal pressure shale gas, horizontal well, high density, low cost, network fracturing

CLC Number:

TE357

Tingxue JIANG,Yuan SU,Xiaobing BIAN, et al. Network fracturing technology with low cost and high density for normal pressure shale gas[J]. Reservoir Evaluation and Development, 2019, 9(5): 78-83.

Figures/Tables 12

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Table 1

Fig. 6

Table 2

Table 3

Table 4

Fig. 7

Table 5

References 15

[1]	邹才能, 赵群, 董大忠 , 等. 页岩气基本特征、主要挑战与未来前景[J]. 天然气地球科学, 2017,28(12):1781-1796.
[2]	路保平, 丁士东 . 中国石化页岩气工程技术新进展与发展展望[J]. 石油钻探技术, 2018,46(1):1-9.
[3]	何希鹏, 张培先, 房大志 , 等. 渝东南彭水—武隆地区常压页岩气生产特征[J]. 油气地质与采收率, 2018,25(5):72-79.
[4]	方志雄, 何希鹏 . 渝东南武隆向斜常压页岩气形成与演化[J]. 石油与天然气地质, 2016,37(6):819-827.
[5]	叶海超, 光新军, 王敏生 , 等. 北美页岩油气低成本钻完井技术及建议[J]. 石油钻采工艺, 2017,( 5):552-558.
[6]	GULEN G, IKONNIKOVA S, BROWNING J , et al. Fayetteville shale-production outlook[J]. SPE Economics & Management, 2014,7(2):47-59.
[7]	WILLIAMS-KOVACS J, CLARKSON C R. Stochastic modeling of two-phase flowback of multi-fractured horizontal wells to estimate hydraulic fracture properties and forecast production[C]// paper SPE-164550-MS presented at the SPE Unconventional Resources Conference-USA,10-12 April 2013,The Woodlands, Texas, USA.
[8]	FAN L, THOMPSON J W, ROBINSON J R. Understanding gas production mechanism and effectiveness of well stimulation in the Haynesville shale through reservoir simulation[C]// paper SPE-136696-MS presented at the Canadian Unconventional Resources and International Petroleum Conference,19-21 October 2010, Calgary, Alberta, Canada.
[9]	CHENG Y M. Impact of water dynamics in fractures on the performance of hydraulically fractured wells in gas-shale reservoirs[C]// paper SPE-127863-MS presented at the SPE International Symposium and Exhibition on Formation Damage Control,10-12 February 2010,Lafayette, Louisiana, USA.
[10]	周再乐, 张广清, 熊文学 , 等. 水平井限流压裂射孔参数优化[J]. 断块油气田, 2015,22(3):374-378.
[11]	潘林华, 程礼军, 张烨 , 等. 页岩气水平井多段分簇起裂压力数值模拟[J]. 岩土力学, 2015,36(12):3639-3648.
[12]	郭建春, 李根, 周鑫浩 . 页岩气藏缝网压裂裂缝间距优化研究[J]. 岩土力学, 2016,37(11):3123-3129.
[13]	蒋廷学, 卞晓冰, 王海涛 , 等. 页岩气水平井分段压裂排采规律研究[J]. 石油钻探技术, 2013,41(5):21-25.
[14]	侯冰, 陈勉, 张保卫 , 等. 裂缝性页岩储层多级水利裂缝扩展规律研究[J]. 岩土工程学报, 2015,37(6):1041-1046. doi: 10.11779/CJGE201506010
[15]	侯腾飞, 张士诚, 马新仿 , 等. 支撑剂沉降规律对页岩气压裂水平井产能的影响[J]. 石油钻采工艺, 2017,39(5):638-645.

黏度/（mPa·s）	排量/ （m³·min^-1）	主缝最大缝宽/mm	主缝平均缝宽/mm	次级缝最大缝宽/mm	次级缝平均缝宽/mm
3	10	4.20	2.21	0.57	0.28
3	12	4.60	2.42	0.66	0.32
3	14	4.64	2.44	0.68	0.33
3	16	4.52	2.38	0.74	0.36
3	18	4.50	2.37	0.78	0.38
10	10	4.31	2.27	0.78	0.38
10	12	4.37	2.30	0.80	0.39
10	14	4.39	2.31	0.82	0.40
10	16	4.37	2.30	0.84	0.41
10	18	4.28	2.25	0.86	0.42

簇	主缝				分支缝
簇	缝长/m	最大缝宽/mm	平均缝宽/mm	裂缝体积/m³	缝长/m	最大缝宽/mm	平均缝宽/mm	裂缝体积/m³
第1簇	520	4.1	2.3	45	2 222	0.7	0.4	21
第2簇	480	4.2	2.3	48	1 797	0.8	0.5	20
第3簇	520	4.1	2.2	44	2 190	0.7	0.4	20
合计				137				61

体系配方	表观黏度/（mPa·s）	降阻率/%	表面张力/（mN·m^-1）	防膨率/%
0.01 %降阻剂+0.1 %助排剂+0.3 %防膨剂	2.3	70.0	22.8	75.0
0.03 %降阻剂+0.1 %助排剂+0.3 %防膨剂	6.6	69.3	22.6	78.0
0.07 %降阻剂+0.1 %助排剂+0.3 %防膨剂	11.5	67.2	24.3	79.0
0.10 %降阻剂+0.1 %助排剂+0.3 %防膨剂	14.5	66.5	25.3	78.0

井名	压裂段长/m	压裂段数	单段簇数	总液量/m³	总砂量/m³	排量/（m³·min^-1）	平均日产量/10⁴m³
A	1 920	20	4~6	45 719	2 576	12~18	10
B	1 280	20	3~5	46 542	2 108	12~18	3.7
C	1 400	19	2~5	21 388	814	12~16	3.3

井名	井深/ m	水平段长/ m	总砂量/ m³	总液量/ m³	压裂段数/ 段	压裂主车/ 台	6000电动泵/ 台	压裂总费用/万元	平均单段费用/ 万元
D（17段）	4 378	1 317	2 008.2	34 139.0	17	18	0	3 216.00	189.18
A（20段）	4 573	1 800	2 576.0	45 719.3	20	6	8	2 551.00	127.55
A与D差值	195	483	567.8	11 580.3	3	-12	8	-665.00	-61.63

Network fracturing technology with low cost and high density for normal pressure shale gas

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 12

References 15

Related Articles 15

Metrics

Comments

Recommended 0

[1]	ZHANG Yi, NING Chongru, CHEN Yazhou, JI Yulong, ZHAO Liyang, WANG Aifang, HUANG Jingjing, YU Kaiyi. Huff-n-puff technology and parameter optimization of large displacement water injection in tight oil reservoir [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(5): 727-733.
[2]	LIU Wei, CAO Xiaopeng, HU Huifang, CHENG Ziyan, BU Yahui. Production influencing factors analysis and fracturing parameters optimization of shale oil horizontal wells [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(5): 764-770.
[3]	YANG Zhaozhong, YUAN Jianfeng, ZHANG Jingqiang, LI Xiaogang, ZHU Jingyi, HE Jiangang. Research progress and understanding of fracturing fractures in horizontal wells of marine shale in Sichuan Basin [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(4): 600-609.
[4]	LI Xuebin,JIN Lixin,CHEN Chaofeng,YU Tianxi,XIANG Yingjie,YI Duo. Key technologies of horizontal well fracturing for deep coal-rock gas: A case study of Jurassic in Baijiahai area, Junggar Basin [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(4): 629-637.
[5]	ZHAO Haifeng, WANG Tengfei, LI Zhongbai, LIANG Wei, ZHANG Tao. Study on dynamic stress field for fracturing in horizontal well group of shale oil [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(3): 352-363.
[6]	YAO Hongsheng, WANG Wei, HE Xipeng, ZHENG Yongwang, NI Zhenyu. Development practices of geology-engineering integration in complex structural area of Nanchuan normal pressure shale gas field [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 537-547.
[7]	XUE Gang, XIONG Wei, ZHANG Peixian. Genesis analysis and effective development of normal pressure shale gas reservoir: A case of Wufeng-Longmaxi shale gas reservoir in southeast margin of Sichuan Basin [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 668-675.
[8]	LUO Hongwen, ZHANG Qin, LI Haitao, XIANG Yuxing, LI Ying, PANG Wei, LIU Chang, YU Hao, WANG Yaning. Influence law of temperature profile for horizontal wells in tight oil reservoirs [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 676-685.
[9]	ZHANG Fengxi, NIU Congcong, ZHANG Yichi. Evaluation of multi-stage fracturing a horizontal well of low permeability reservoirs in East China Sea [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 695-702.
[10]	HU Zhijian, LI Shuxin, WANG Jianjun, ZHOU Hong, ZHAO Yulong, ZHANG Liehui. Productivity evaluation of multi-stage fracturing horizontal wells in shale gas reservoir with complex artificial fracture occurrence [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(4): 459-466.
[11]	CHEN Meng,XIE Weifeng,ZHANG Yu,YANG Guofeng,LIU Xiangjun. Methods and application for water holdup calculation and flowing image based on array electromagnetic wave instrument in horizontal water-oil wells [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(4): 505-512.
[12]	QIU Xiaoxue,ZHONG Guanghai,LI Xiansheng,CHEN Meng,LING Weitong. CFD simulation of flow characteristics of shale gas horizontal wells with different inclination [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(3): 340-347.
[13]	YAO Hongsheng,YUN Lu,ZAN Ling,ZHANG Longsheng,QIU Weisheng. Development mode and practice of fault-block oriented shale oil well in the second member of Funing Formation, Qintong Sag, Subei Basin [J]. Reservoir Evaluation and Development, 2023, 13(2): 141-151.
[14]	ZHANG Jinhong. Progress in Sinopec shale oil engineering technology [J]. Reservoir Evaluation and Development, 2023, 13(1): 1-8.
[15]	WANG Xiaoqiang,ZHAO Li’an,WANG Zhiyuan,XIU Chunhong,JIA Guolong,DONG Yan,LU Detang. Data analysis method of pump shutdown pressure based on water hammer effect and cepstrum transformation [J]. Reservoir Evaluation and Development, 2023, 13(1): 108-116.