页岩油注气提高采收率现状及可行性分析

Abstract

Abstract:

Shale oil resources are rich around the world and have extraordinary exploitation prospects. However, drilling horizontal wells and huge amounts of hydraulic fracturing measures had sharply increased the cost. A large number of experiments and numerical simulations showed that the gas injection could significantly improve the shale oil recovery. Nevertheless, this technique had not been implemented to the practical exploitation of shale oil. Consequently, it was still controversial whether shale oil recovery could be optimized through gas injection or not. By the comparison of the gas displacement experiments of the shale cores, the numerical simulation of shale oil recovery by gas injection and the gas injection pilots in practical fields, it was found that the results from experimental conditions and numerical simulation models were different from those in field pilots. Li Chuanliang insisted that the shale reservoir was consisted of myriad micro-lithologic traps. It was concluded that only if the gas was injected after fracturing, or establishing an orthogonal horizontal well pattern to dense the well spacing, would the shale oil recovery be improved. It has essential guidance for the improvement of shale oil recovery in China or even in the world.

Key words: shale oil, gas injection, improved oil recovery, gas drive experiment, numerical simulation, field pilots, feasibility analysis

CLC Number:

TE341

Mei Haiyan,He Lang,Zhang Maolin,Hu Xinrui,Mao Hengbo. Status and feasibility analysis on improved shale-oil recovery by gas injection[J].Reservoir Evaluation and Development, 2018, 8(6): 77-82.

Figures/Tables 7

Fig. 1

Fig. 2

Table 1

Fig. 3

Fig. 4

Table 2

Fig. 5

References 28

[1]	张廷山, 彭志, 杨巍 , 等. 美国页岩油研究对我国的启示[J]. 岩性油气藏, 2015,27(3):1-10.
[2]	贾承造 . 论非常规油气对经典石油天然气地质学理论的突破及意义[J]. 石油勘探与开发, 2017,44(1):1-11. doi: 10.11698/PED.2017.01.01
[3]	雏才能, 陶士振, 白斌 , 等. 论非常规油气与常规油气的区别和联系[J]. 中国石油勘探, 2015,20(1):1-16.
[4]	Schmidt M, Sekar B K . Innovative unconventional EOR-A light EOR and unconventional tertiary recovery approach to an unconventional Bakken reservoir in Southeast Saskatchewan[C]// paper WPC-21-1921 presented at the 21st World Petroleum Congress, 15-19 June 2014, Moscow, Russia.
[5]	Zhu P, Balhoff M T, Mohanty K K . Simulation of fracture-to-fracture gas injection in an oil-rich shale[C]// paper SPE-175131-MS presented at the SPE Annual Technical Conference and Exhibition, 28-30 September 2015, Houston, Texas, USA.
[6]	Wan T, Sheng J J, Soliman M Y . Evaluate EOR potential in fractured shale oil reservoirs by cyclic gas injection[C]// paper URTEC-1611383-MS presented at the Unconventional Resources Technology Conference, 12-24 August 2013, Denver ,Colorado, USA.
[7]	Wan T . Evaluation of the EOR potential in shale oil reservoirs by cyclic gas injection[C]// paper SPWLA-d-12-00119 presented at the SPWLA 54th Annual Logging Symposium, 22-26 June 2013, New Orleans Louisiana, USA.
[8]	Wan T, Meng X, Sheng J J , et al. Compositional modeling of EOR process in stimulated shale oil reservoirs by cyclic gas injection[C]// paper SPE-169069-MS presented at the SPE Improved Oil Recovery Symposium, 12-16 April 2014, Tulsa, Oklahoma, USA.
[9]	Tao Wan, James Sheng, Marshall Watson . Compositional modeling of the diffusion effect on EOR Process in fractured shale oil reservoirs by gas flooding[C]// paper URTEC-1891403-MS presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, 25-27 Augst 2014, Denver, Colorado, USA.
[10]	A R Kovscek, G Q Tang, B Vega . Experimental investigation of oil recovery from siliceous shale by CO₂ injection[C]// paper SPE-115679-MS presented at the SPE Annual Technical Conference and Exhibition, 21-24 September 2008, Denver, Colorado, USA.
[11]	Hoffman B T . Comparison of various gases for enhanced recovery from shale oil reservoirs[C]// paper SPE-154329-MS presented at the 18th SPE Improved Oil Recovery Symposium, 14-18 April 2012, Tulsa, Oklahoma, USA.
[12]	Wei Y, Al-Shalabi E W, Sepehrnoori K . A sensitivity study of potential CO₂ injection for enhanced gas recovery in Barnett shale reservoirs[C]// paper SPE-169012-MS presented at the SPE Unconventional Resources Conference, 1-3 April 2014, the Woodlands, Texas, USA.
[13]	Vega B, O'Brien W J, Kovscek A R . Experimental investigation of oil recovery from siliceous shale by miscible CO₂ injection[C]// paper SPE-135627-MS presented at the SPE Annual Technical Conference and Exhibition, 19-22 September 2010, Florence, Italy.
[14]	Alharthy N, Teklu T, Kazemi H , et al. Enhanced oil recovery in liquid-rich shale reservoirs: Laboratory to field[C]// paper SPE-175034-MS presented at the SPE Annual Technical Conference and Exhibition, 28-30 September 2015, Houston, USA.
[15]	Gamadi T D . Experimental and numerical study of the EOR potential in shale oil reservoirs by cyclic gas injection[D]. Texas, USA: Texas Tech University, 2014.
[16]	Gamadi T D, Sheng J J, Soliman M Y . An Experimental Study of Cyclic Gas Injection to Improve Shale Oil Recovery[C] paper 169142-MS presented at the SPE Improved Oil Recovery Symposium, 12-16 April 2014, Tulsa, Oklahoma, USA.
[17]	Tovar F . Experimental investigation of enhanced recovery in unconventional liquid reservoirs using CO₂: A look ahead to the future of unconventional EOR[C]// paper SPE-169022-MS presented at the SPE Unconventional Resources Conference, 1-3 April 2014, the Woollands, Texas, USA.
[18]	Hawthorne S B, Gorecki C D, Sorensen J A , et al. Hydrocarbon mobilization mechanisms from upper middle and lower Bakken reservoir rocks exposed to CO₂[C]// paper SPE-167200-MS presented at the SPE Unconventional Resources Conference Canada, 5-7 November 2013, Calgary, Alberta,Canada.
[19]	Gamadi T D, Elldakli F, Sheng J J . Compositional simulation evaluation of EOR potential in shale oil reservoirs by cyclic natural gas injection[C]// paper URTEC-1922690-MS presented at the Unconventional Resources Technology Conference, 25-27 August 2014, Denver, Colorado, USA.
[20]	Dong C, Hoffman B T . Modeling gas injection into shale oil reservoirs in the Sanish field, North Dakota[C]// paper URTEC-168827-MS presented at the Unconventional Resources Technology Conference,12-14 August 2013, Denver, Colorado, USA.
[21]	Tao Xu, Todd Hoffman . Hydraulic fracture orientation for miscible gas injection EOR in unconventional oil reservoirs[C]// paper URTEC-168774-MS presented at the Unconventional Resources Technology Conference, 12-14 Augst 2013, Denver, Coorado, USA.
[22]	Chen C, Balhoff M, Mohanty K K . Effect of reservoir heterogeneity on primary recovery and CO₂ huff 'n' puff recovery in shale-oil reservoirs[J]. SPE Reservoir Evaluation and Engineering, 2015,17(3):404-413.
[23]	Hoffman B. Todd, Evans J G . Improved oil recovery ior pilot projects in the Bakken formation[C]// paper SPE-180270-MS presented at the SPE Low Perm Symposium, 5-6 May 2016, Denver, Colorado, USA.
[24]	Lawal H, Jackson G, Abolo N , et al. A novel approach to modeling and forecasting frac hits in shale gas wells[C]// paper SPE-164898-MS presented at the EAGE Annual Conference & Exhibition Incorporating SPE Europec, 10-13 June 2013, London, United Kingdom.
[25]	King G E . 60 years of multi-fractured vertical, deviated and horizontal wells: What have we learned?[C]// paper SPE-170952-MS presented at the SPE Annual Technical Conference and Exhibition, 27-29 October 2014, Amsterdam, The Netherlands.
[26]	Kurtoglu B, Salman A . How to utilize hydraulic fracture interference to improve unconventional development[C]// paper SPE-177953-MS presented at the Abu Dhabi International Petroleum Exhibition and Conference, 9-12 November 2015, Abu Dhabi, UAE.
[27]	Baker R, Dieva R, Jobling R , et al. The myths of waterfloods, EOR floods and how to optimize real injection schemes[C]// paper SPE-179536-MS presented at the SPE Improved Oil Recovery Conference, 11-13 April 2016, Tulsa, Oklahoma, USA.
[28]	李传亮, 朱苏阳 . 页岩气其实是自由气[J]. 岩性油气藏, 2013,25(1):1-3.

试验号	地区	年份	注入流体	注入方式
试验#1	北达科他州	2008	CO₂	吞吐
试验#2	蒙大纳州	2009	CO₂	吞吐
试验#3	北达科他州	2012	水	吞吐
试验#4	北达科他州	2012~2013	水	水驱
试验#5	北达科他州	2014	CO₂	直井注入
试验#6	蒙大纳州	2014	水	水驱
试验#7	北达科他州	2014	天然气	气驱

参数	值	参数	值
试验面积/km²	1.46	原始地层压力/MPa	16
储层有效厚度/m	7~8	原始地层体积系数	1.328
孔隙度,%	9~10	原油黏度/（mPa·s）	2~3
渗透率/10^-3μm²	0.01~0.1	原油重度/API	42
含水饱和度,%	55~59	地质储量/10⁸m³	12.72

Status and feasibility analysis on improved shale-oil recovery by gas injection

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 7

References 28

Related Articles 15

Metrics

Comments

Recommended 10

[1]	CUI Yudong, LU Cheng, GUAN Ziyue, LUO Wanjing, TENG Bailu, MENG Fanpu, PENG Yue. Effects of creep on depressurization-induced gas well productivity in South China Sea natural gas hydrate reservoirs [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(6): 809-818.
[2]	HE Haiyan, LIU Xianshan, GENG Shaoyang, SUN Junchang, SUN Yanchun, JIA Qian. Numerical simulation of UGS facilities rebuilt from oil reservoirs based on the coupling of seepage and temperature fields [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(6): 819-826.
[3]	LIANG Yunpei, ZHANG Huaijun, WANG Lichun, QIN Chaozhong, TIAN Jian, CHEN Qiang, SHI Bowen. Numerical simulation of flow fields and permeability evolution in real fractures under continuous loading stress [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(6): 834-843.
[4]	YANG Bing, FU Qiang, GUAN Jingtao, LI Linxiang, PAN Haoyu, SONG Hongbin, QIN Tingting, ZHU Zhiwei. Oil displacement efficiency based on different well pattern adjustment simulation in high water cut reservoirs [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(4): 519-524.
[5]	CHEN Xiulin, WANG Xiuyu, XU Changmin, ZHANG Cong. CO₂ sequestration morphology and distribution characteristics based on NMR technology and microscopic numerical simulation [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(3): 296-304.
[6]	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.
[7]	ZHANG Jinhong. Progress in Sinopec shale oil engineering technology [J]. Reservoir Evaluation and Development, 2023, 13(1): 1-8.
[8]	HOU Mengru,LIANG Bing,SUN Weiji,LIU Qi,ZHAO Hang. Influence of mineral interface stiffness on fracture propagation law of shale hydraulic fracturing [J]. Reservoir Evaluation and Development, 2023, 13(1): 100-107.
[9]	WANG Xiaoming,CHEN Junbin,REN Dazhong. Research progress and prospect of pore structure representation and seepage law of continental shale oil reservoir [J]. Reservoir Evaluation and Development, 2023, 13(1): 23-30.
[10]	SONG shuling,YANG Erlong,SHA Mingyu. Influencing factors of occurrence state of shale oil based on molecular simulation [J]. Reservoir Evaluation and Development, 2023, 13(1): 31-38.
[11]	LIN Zhongkai,ZHANG Shaolong,LI Chuanhua,WANG Min,YAN Jianping,CAI Jingong,GENG Bin,HU Qinhong. Types of shale lithofacies assemblage and its significance for shale oil exploration: A case study of Shahejie Formation in Boxing Sag [J]. Reservoir Evaluation and Development, 2023, 13(1): 39-51.
[12]	LIU Yexuan,LIU Xiangjun,DING Yi,ZHOU Xin,LIANG Lixi. Evaluation method of fracability of shale oil reservoir considering influence of interlayer [J]. Reservoir Evaluation and Development, 2023, 13(1): 74-82.
[13]	XIE Xin,DOU Zhengdao,YANG Xiaomin,JIN Jing,WANG Yuanyuan,REN Fei. ROP enhancement technique for slimhole drilling in shale oil development [J]. Reservoir Evaluation and Development, 2023, 13(1): 83-90.
[14]	HE Feng,FENG Qiang,CUI Yushi. Production schedule optimization of gas wells in W shale gas reservoir under controlled pressure difference based on numerical simulation [J]. Reservoir Evaluation and Development, 2023, 13(1): 91-99.
[15]	CHEN Shaoying,WANG Wei,YANG Qingchun,ZHANG Lisong. Sequential coupling thermal-hydro-mechanical model for multiple cluster of fracturing network fracturing in dry hot rock reservoir [J]. Petroleum Reservoir Evaluation and Development, 2022, 12(6): 869-876.