Key Technology of Volumetric Fracturing in Vertical Wells of Hugely Thick Shale Oil Reservoirs in the Fengcheng Formation of the Mahu Sag

HAO Lihua; GAN Renzhong; PAN Liyan; RUAN Dong; LIU Chenggang

doi:10.11911/syztjs.2021092

Volume 49 Issue 4

Jul. 2021

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Petroleum Drilling Techniques > 2021 > 49(4): 99-105. > DOI: 10.11911/syztjs.2021092

HAO Lihua, GAN Renzhong, PAN Liyan, RUAN Dong, LIU Chenggang. Key Technology of Volumetric Fracturing in Vertical Wells of Hugely Thick Shale Oil Reservoirs in the Fengcheng Formation of the Mahu Sag[J]. Petroleum Drilling Techniques, 2021, 49(4): 99-105. DOI: 10.11911/syztjs.2021092

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Key Technology of Volumetric Fracturing in Vertical Wells of Hugely Thick Shale Oil Reservoirs in the Fengcheng Formation of the Mahu Sag

1.
Research Institute of Engineering Technology, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000, China
2.
Exploration Department, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000, China
3.
Well Testing Company, CNPC Xibu Drilling Engineering Company Limeted, Karamay, Xinjiang, 834000, China
4.
Emergency Rescue Center, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000, China

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Received Date: March 09, 2021
Revised Date: June 20, 2021
Available Online: July 19, 2021

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Abstract

Abstract

Shale oil reservoirs in the Fengcheng Formation of the Mahu Sag are characterized by a large buried depth of sandbodies, huge thickness, overall oil-bearing properties, dense matrix, and enrichment in metal ions. As a result, fracturing is prone to be insufficient in vertical extension and unable to cover the reservoir, with low fracture complexity, high sanding risks, and an incompatibility of conventional guar gum fracturing fluid. Based on a detailed description of reservoir mechanical properties and an evaluation of the main controlling factors of fracture networks, a calculation model of fracability index was built to fully exploit the exploration potential of the shale oil in this area. In light of the vertical fracture propagation, the perforation clusters and cluster spacing were determined to develop a fine vertical layered approach. In accordance with the development of natural fractures, the optimized volumetric fracturing technology was upgraded, and the net pressure in fracture was increased by construction with high pumping rate. Multi-scale filling was realized with the combination of proppants of different sizes, and a gradual pumping rate increase was employed to ensure safe sand adding. Further, a series of temperature-resistant and salt-resistant polymer fracturing fluids were developed. As a result, the key technology was developed for volumetric fracturing in vertical wells of hugely thick shale oil reservoirs in the Fengcheng Formation of the Mahu Sag. This technology has been successfully applied in Well MY1 in the shale oil reservoirs of the Fengcheng Formation, with a high-yield oil flow of 50 m³ per day after stimulation treatment. This started a new and promising prospect of unconventional reservoir exploration in the Mahu Sag, which is of great significance in guiding the subsequent shale oil development in this area.
- Mahu Sag,
- shale oil,
- hugely thick reservoir,
- vertical well,
- volumetric fracturing

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[1]	闫林,陈福利,王志平,等. 我国页岩油有效开发面临的挑战及关键技术研究[J]. 石油钻探技术,2020,48(3):63–69. doi: 10.11911/syztjs.2020058 YAN Lin, CHEN Fuli, WANG Zhiping, et al. Challenges and technical countermeasures for effective development of shale oil in China[J]. Petroleum Drilling Techniques, 2020, 48(3): 63–69. doi: 10.11911/syztjs.2020058
[2]	王小军,杨智峰,郭旭光,等. 准噶尔盆地吉木萨尔凹陷页岩油勘探实践与展望[J]. 新疆石油地质,2019,40(4):402–413. WANG Xiaojun, YANG Zhifeng, GUO Xuguang, et al. Practices and prospects of shale oil exploration in Jimsar Sag of Junggar Basin[J]. Xinjiang Petroleum Geology, 2019, 40(4): 402–413.
[3]	支东明,宋永,何文军,等. 准噶尔盆地中-下二叠统页岩油地质特征、资源潜力及勘探方向[J]. 新疆石油地质,2019,40(4):389–401. ZHI Dongming, SONG Yong, HE Wenjun,et al. Geological characteristics, resource potential and exploration direction of shale oil in middle-Lower Permian, Junggar Basin[J]. Xinjiang Petroleum Geology, 2019, 40(4): 389–401.
[4]	许琳,常秋生,冯玲丽,等. 准噶尔盆地玛湖凹陷二叠系风城组页岩油储层特征及控制因素[J]. 中国石油勘探,2019,24(5):649–660. doi: 10.3969/j.issn.1672-7703.2019.05.011 XU Lin, CHANG Qiusheng, FENG Lingli, et al. The reservoir characteristics and control factors of shale oil in Permian Fengcheng Formation of Mahu sag, Junggar Basin[J]. China Petroleum Exploration, 2019, 24(5): 649–660. doi: 10.3969/j.issn.1672-7703.2019.05.011
[5]	吴宝成,李建民,邬元月,等. 准噶尔盆地吉木萨尔凹陷芦草沟组页岩油上甜点地质工程一体化开发实践[J]. 中国石油勘探,2019,24 (5):679–690. doi: 10.3969/j.issn.1672-7703.2019.05.014 WU Baocheng, LI Jianmin, WU Yuanyue, et al. Development practices of geology-engineering integration on upper sweet of Lucaogou Formation shale oil in Jimsar Sag, Junggar Basin[J]. China Petroleum Exploration, 2019, 24 (5): 679–690. doi: 10.3969/j.issn.1672-7703.2019.05.014
[6]	FIALLOS TORRES Mauricio,MORALES Adrián,YU Wei,et al. 基于嵌入式离散裂缝建模的Eagle Ford页岩油复杂水力裂缝综合表征[J]. 石油勘探与开发,2021,48(3):713–720. doi: 10.1016/S1876-3804(21)60057-5 FIALLOS TORRES Mauricio, MORALES Adrián, YU Wei, et al. Characterization of complex hydraulic fractures in Eagle Ford shale oil development through embedded discrete fracture modeling[J]. Petroleum Exploration and Development, 2021, 48(3): 713–720. doi: 10.1016/S1876-3804(21)60057-5
[7]	孙龙德,刘合,何文渊,等. 大庆古龙页岩油重大科学问题与研究路径探析[J]. 石油勘探与开发,2021,48(3):453–463. SUN Longde, LIU He, HE Wenyuan, et al. An analysis of major scientific problems and research paths of Gulong shale oil in Daqing Oilfield NE China[J]. Petroleum Exploration and Development, 2021, 48(3): 453–463.
[8]	杨灿,王鹏,饶开波,等. 大港油田页岩油水平井钻井关键技术[J]. 石油钻探技术,2020,48(2):34–41. doi: 10.11911/syztjs.2020036 YANG Can, WANG Peng, RAO Kaibo, et al. Key technologies for drilling horizontal shale oil wells in Dagang Oilfield[J]. Petroleum Drilling Techniques, 2020, 48(2): 34–41. doi: 10.11911/syztjs.2020036
[9]	刘致水,孙赞东. 新型脆性因子及其在泥页岩储集层预测中的应用[J]. 石油勘探与开发,2015,42(1):117–124. LIU Zhishui, SUN Zandong. New brittleness indexes and their application in shale/clay gas reservoir prediction[J]. Petroleum Exploration and Development, 2015, 42(1): 117–124.
[10]	王剑波,葛洪魁,王小琼,等. 利用超声尾波干涉评价页岩应力敏感性[J]. 岩土力学,2016,37(11):3299–3308. WANG Jianbo, GE Hongkui, WANG Xiaoqiong, et al. Using ultrasonic coda wave interferometry to evaluate shale stress sensi-tivity[J]. Rock and Soil Mechanics, 2016, 37(11): 3299–3308.
[11]	李旺,李连崇,唐春安. 水平井平行裂缝间诱导应力干扰机制的数值模拟研究[J]. 天然气地球科学,2016,27(11):2043–2053. doi: 10.11764/j.issn.1672-1926.2016.11.2043 LI Wang, LI Lianchong, TANG Chunan. Numerical simulation research on mechanism of induced stress perturbation between parallel fractures in horizontal wells[J]. Natural Gas Geoscience, 2016, 27(11): 2043–2053. doi: 10.11764/j.issn.1672-1926.2016.11.2043
[12]	丛平,闫建平,井翠,等. 页岩气储层可压裂性级别测井评价及展布特征:以川南X地区五峰组–龙马溪组为例[J]. 岩性油气藏,2021,33(3):177–188. CONG Ping, YAN Jianping, JING Cui, et al. Logging evaluation and distribution characteristics of fracturing grade in shale gas reservoir: a case study from Wufeng Formation and Longmaxi Formation in X area, southern Sichuan Basin[J]. Lithologic Reservoirs, 2021, 33(3): 177–188.
[13]	刘菲菲. 致密储层人工缝网形成能力研究[D]. 北京: 中国石油大学（北京）, 2018. LIU Feifei. Research on formation ability of artificial fracture network in tight reservoir[D]. Beijing: China University of Petroleum(Beijing). 2018.
[14]	曾波,王星皓,黄浩勇,等. 川南深层页岩气水平井体积压裂关键技术[J]. 石油钻探技术,2020,48(5):77–84. doi: 10.11911/syztjs.2020073 ZENG Bo, WANG Xinghao, HUANG Haoyong, et al. Key technology of volumetric fracturing in deep shale gas horizontal wells in Southern Sichuan[J]. Petroleum Drilling Techniques, 2020, 48(5): 77–84. doi: 10.11911/syztjs.2020073

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Key Technology of Volumetric Fracturing in Vertical Wells of Hugely Thick Shale Oil Reservoirs in the Fengcheng Formation of the Mahu Sag

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