Research on the Synthesis and Characterization of a Novel Dendritic Thickening Agent

Abstract:

A novel dendritic thickening agent has been prepared on account of the poor temperature resistance performance and other shortcomings of conventional polymer thickening agent (HPAM), and has evaluated its monomer proportioning and the performance of formed fracturing fluid. Accordingly, it has derived that, when the concentration of the polar monomer AMPS and the functional monomer GL is 30% and 1%, respectively, this novel dendritic thickening agent is able to maintain the excellent temperature resistance and shear resistance of the fracturing fluid system at lower concentrations. The optimal formula of the formed fracturing fluid is: 0.4% thickening agent +0.15% pH adjusting agent +0.25% crosslinking agent +0.1% discharge aiding agent. Under the conditions of 170s^-1 and 150°C, it has tested its temperature resistance and shear resistance properties, and the final viscosity after shearing for 2h was 147.6 mPa.s. The gel breaking liquid is characterized by low viscosity, low surface tension, low interfacial tension, little residue content, and is conductive to the smooth flowback of the gel breaking liquid after fracturing construction. Compared with the conventional guanidine gum fracturing fluid system, this novel dendritic thickening agent fracturing fluid system has much lower residue content.

• Periodical: Advanced Materials Research (Volume 1028)
• Pages: 84-89
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1028.84
• Online since: September 2014
• Authors: Chao Wang*, Jian Ouyang, Zhuo Yan Zhu, Gui Fu Duan, Feng Wang, Yuan Yuan Wang
• Keywords: Dendritic Thickening Agent, Fracturing Fluid, High Temperature Resistance, Low Damage

References

[1] Jia Chengzao, Zheng Min, Zhang Yongfeng. Unconventional hydrocarbon resources in China and the prospect of exploration and development[J]. Petroleum Exploration and Development, 2012, 39(2): 129-136.

DOI: 10.1016/s1876-3804(12)60026-3

[2] JIANG Huai-you, LI Zhi-ping, ZHONG Tai-xian, et al. Current Situation and Prospects of Development Technology for Low Permeability Oil and Gas Fields in the World [J] Special Oil and Gas Reservoir, 2009, 16 (4): 13-17.

[3] Hao Chun-ling. A Water-Based Fracturing Fluid Thickener and Its Production Method [P] China:. CN 101220263A, 2008-7-16.

[4] Funkhouser G P, Saini R K, Mukherjee A. High temperature fracturing fluids and methods: U.S. Patent 8, 450, 252[P]. 2013-5-28.

[5] Montgomery C. Fracturing Fluids[J]. (2013).

[6] The Dow Chemical Company. Water-Dispersible Hydrophobic Thickening Agent: US, 4432881[P]. 1984-O2-21.

[7] ZhangY X, Da A H, ButlerG B, et a1. A Fluorine-Containing Hydrophobically Associating Polymer: I. Synthesis and Solution Properties of Copolymers of Acrylamide and Fluorine-Containing Acrylates or Methacrylates[J]. J Polym Sci, A: polym Chem, 1992, 30(7): 1383—1391.

DOI: 10.1002/pola.1992.080300717

[8] Zeng Ke, et al. The Synthesis and Application of Small Molecules Chain Branching Polymer Fracturing fluid [J]. Drilling Fluid & Completion Fluid, 2013, 30 (5): 75 -78.

[9] Parris M, Mirakyan A, Abad C. A new shear-tolerant high temperature fracturingfluid[Z]. SPE 121755, (2010).

[10] Chen Kai, et al. Preparation and Structure-Properties Relationship of High-Temperature Synthetic Polymer-Based Fracturing Fluid [J] Chemical Engineering of Oil & Gas, 2011, 40 (4): 385-389.