Abstract
Zanazour Oilfield has the typical characteristics of large perforation interval span, large number of perforation intervals, large differences in physical properties between different layers, and uneven fluid production profile. In order to achieve uniform acidification requirements, improve fluid production profile, and increase the use of low permeability layers, a multifunctional diverting acid fluid system suitable for the characteristics of the Zanazour oilfield was developed. The system has the characteristics of temporary blocking and diverting, selective acidification, and energy-assisted flowing back and so on. Based on the reservoir and fluid characteristics, lithology and physical properties of the oilfield, three acid liquid systems with good compatibility and temporary plugging, diverting, deep acidification, and energy-enhancing flowing back were developed, and their properties were tested with laboratory tests. At the same time, in order to give full play to the advantages of different functional acid liquid systems and achieve the purpose of synergistic enhancement, selective foamed acid systems and technologies, as well as emulsified self-diverting acid systems and technology have been formed. The pilot implementation of the field experiments, through high construction success rate and significant better production increasing effect than that of conventional liquids, indicated that the multifunctional diverting acid system and synergistic acidification technology have better adaptability in the oil field.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Han, Y., Feng, Q., Yang, X., et al.: Key technologies of Y344 packer and string technology for large-scale fracturing. Well Test. 28(6), 21–26 (2019)
Zhang, H., Cui, M., Yan, X., He, A., Jiang, W., Liang, C., Yan, J.: Uniformly acidized lateral horizontal well with drawing coiled tubing. J. Shenzhen Univ. Sci. Eng. 33(3), 234 (2016). (in Chinese)
Liang, T., Wei, D., Zhou, F., Li, X., Yuan, L., Wang, B., Jun, L.: Field experiments on multi-stage chemical diversion in low-permeability HPHT reservoirs. J. Petrol. Sci. Engi. 187, 106738 (2020)
Vernáez, O., GarcÃa, A., Castillo, F., Ventresca, M.L., Müller, A.J.: Oil-based self-degradable gels as diverting agents for oil well operations. J. Petrol. Sci. Eng. 146, 874–882 (2016)
Cai, C., Li, G., Shen, Z., Tian, S., Huang, Z., Fan, X: State key laboratory of petroleum resource and prospecting, China University of Petroleum (Beijing). DPT 36(2), 48–51 (2013)
Surjaatmadja, J.B., Al Hamad, A.M., Ables, C.: Unique self-aligning jetting tool provides better acid stimulation and better production results. SPE 144051 (2011)
Huai-guo, Y.A.N.G.: New development of oil well chemical water blocking technology. Oil-Gasfield Surf. Eng. 28(5), 29–30 (2009)
Yan, Y., Xi, Q., Una, C.-C., He, B.-C., Chunheng, W., Dou, L.-L.: A novel acidizing technology in carbonate reservoir: In-Situ formation of CO2 foamed acid and its selfiversion. Colloids Surf. A Physicoch. Eng. Asp. 580, 123787 (2019)
Akanni, O.O., Nasr-El-Din, H.A.: Modeling of wormhole propagation during matrix acidizing of carbonate reservoirs by organic acids and chelating agents. SPE-181348-MS (2016)
Maheshwari, P., Maxey, J., Balakotaiah, V.: Simulation and analysis of carbonate acidization with gelled and emulsified acids. IPEC-171731-MS (2014)
Kalfayan, L.J.: Fracture acidizing: history, present state and future. Paper SPE, pp. 29–31 (2007)
Yousufi, M.M., Elhaj, M.E.M., Moniruzzaman, M.: Comparative analysis of corrosion inhibition: between jatrophacurcas, palm and diesel oil based emulsified acids for acid stimulation operations. IOP Conf. Ser. Earth Environ. Sci. 164, 012006 (2018)
Zou, H., Wang, X., Chen, Y.: Microscopic evaluation of stability and formula optimization on emulsified acid and numerical modeling of acid fracturing. J. Convergence Inf. Technol. 8(8) (2013)
Ayed, M.A., Assem, A.I.: Effect of oil saturation on the flow of emulsified acids in carbonate rocks. SPE 29(1), 29–41 (2014)
Liu, W., Xiong, N., Wu, Z., et al.: Review on types of retarded acid and application of emulsified acid. Adv. Fine Petrochem. 11(9), 12–15, 18 (2010)
Chen, H., Guo, J., Zhao, J., et al.: Experimental research of W/O emulsified acid stability. Chem. Eng. Oil Gas 34(2), 118–121 (2005)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2021 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Zhang, Hw. et al. (2021). Synergistic Diverting Acid System and Its Application in Heterogeneous Carbonate Reservoir Stimulation. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2020. IFEDC 2020. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-0761-5_14
Download citation
DOI: https://doi.org/10.1007/978-981-16-0761-5_14
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-16-0762-2
Online ISBN: 978-981-16-0761-5
eBook Packages: EngineeringEngineering (R0)