Water shutoff in ultralow temperature reservoirs has received great attention in recent years. In previous study, we reported a phenol-formaldehyde-based gel formula with ammonium salt which can provide a gelation time between 2 hrs and 2 days at 25 °C. However, systematic evaluation and field recommendations of this gel formula when encountering complex reservoirs environment are not addressed. In this paper, how and why such practical considerations as water composition, temperature, pH, weight ratio of formaldehyde to resorcinol and contaminant Fe3+ to affect the gelation performance are examined. Brookfield DV-III and scanning electron microscopy (SEM) are employed respectively for viscosity measurement and microstructure analysis. SEM results further illustrate the mechanism of the effect of salinity on gelation performance. It reveals that crosslinking done by covalent bond has great advantage for gel stability under high salinity environment. The target gel formula can provide desirable gelation time below 60 °C, perfect for 15-45 °C, while it is unfeasible to use high salinity to delay gelation at 60 °C. We summarized the effect of salinity on gelation performance of different gel formulas from the present study and published literature. The summarized data can provide important guideline for gel formula design before conducting any kinds of experiments. The variation of gelation performance at different salinity may be dominated by the interaction between crosslinker-salt-polymer, not only limited to “charge-screening effect” and “ion association” proposed by several Authors. We hope the analysis encouraging further investigations. Some recommendations for field application of this gel are given in the end of this paper.
Acknowledgements
This work is Supported by the National Natural Science foundation of China (NSFC) under Award No. 51404202. The special open Fund (Award No. PLN 1412) of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation and China's Central Government for the Development of Local Colleges and Universities, the project of National First-Level Discipline in Oil and Gas Engineering, are also greatly appreciated.
| [1] |
B. Bailey, M. Crabtree, J. Tyrie, J. Elphick, F. Kuchuk, C. Romano, L. Roodhart, Water control, Oilfield Rev. 12 (2000) 30-51.
|
| [2] |
R.S. Seright, J. Liang, W.B. Lindquist, J.H. Dunsmuir, Use of X-ray computed microtomography to understand why gels reduce relative permeability to water more than that to oil, J. Pet. Sci. Eng. 39 (2003) 217-230.
|
| [3] |
R.S. Seright, R.H. Lane, R.D. Sydansk,A strategy for attacking excess water production, in:SPE Paper 70067 Presented at the SPE Permian Basin Oil and Gas Recovery Conference, 15e17 May, Midland, Texas, 2001.
|
| [4] |
Seright R. S., 2004. Conformance Improvement Using Gels. Annual Technical Progress Report. US DOE Report: DOE/BC/15316-6.
|
| [5] |
H. Jia, W.F. Pu, J.Z. Zhao, F.Y. Jin, Application and research of various water control and shutoff methods in fractured reservoirs, Geol. Sci. Technol. Inf. 5 (2010a) 62-70.
|
| [6] |
B. Brattekås, S.G. Pedersen, H.T. Nistov, A. Haugen, A. Graue, J.T. Liang, R. Seright, Washout of Cr (III)-Acetate-HPAM gels from fractures: effect of gel state during placement, SPE Prod. Op. 30 (2015) 99-109.
|
| [7] |
L. Chen, G. Zhang, J. Ge, P. Jiang, Y. Liu, Y. Ran,Property evaluation of a new selective water shutoff agent for horizontal well, Coll. Surf. A Physicochem. Eng. Asp. 446 (2014) 33-45.
|
| [8] |
Z. Hua, M. Lin, J. Guo, F. Xu, Z. Li, M. Li, Study on plugging performance of cross-linked polymer microspheres with reservoir pores, J. Pet. Sci. Eng. 105 (2013) 70-75.
|
| [9] |
H. Jia, Q. Ren, W.F. Pu, J. Zhao, Swelling mechanism investigation of microgel with double-cross-linking structures, Energy Fuels 28 (2014) 6735-6744.
|
| [10] |
S. Li, Z. Li, B. Li, Experimental study and application on profile control using high-temperature foam, J. Pet. Sci. Eng. 78 (2011) 567-574.
|
| [11] |
G. Liu, H. Jiang, J. Li, M. Wang, F. Chen, S. Ding, X. Lu, Evaluation of the performance of polymer gels mixed with asphalt particle as a novel composite profile control system, J. Ind. Eng. Chem. 26 (2015) 309-314.
|
| [12] |
M. Lin, G. Zhang, Z. Hua, Q. Zhao, F. Sun,Conformation and plugging properties of crosslinked polymer microspheres for profile control, Coll. Surf. A Physicochem. Eng. Asp. 477 (2015) 49-54.
|
| [13] |
S.H. Talebian, R. Masoudi, I.M. Tan, P.L.J. Zitha, Foam assisted CO2-EOR: a review of concept, challenges, and future prospects, J. Pet. Sci. Eng. 120 (2014) 202-215.
|
| [14] |
G. Zhao, C. Dai, Y. Zhang, A. Chen, Z. Yan, M. Zhao,Enhanced foam stability by adding comb polymer gel for in-depth profile control in high temperature reservoirs, Coll. Surf. A Physicochem. Eng. Asp. 482 (2015) 115-124.
|
| [15] |
K.S.M. El-Karsani, G.A. Al-Muntasheri, I.A. Hussein, Polymer systems for water shutoff and profile modification: a review over the last decade, SPE J. 19 (2014) 135-149.
|
| [16] |
K.S. El-Karsani, G.A. Al-Muntasheri, A.S. Sultan, I.A. Hussein, Gelation of a water-shutoff gel at high pressure and high temperature: rheological investigation, SPE J. 20 (2015) 1103-1112, http://dx.doi.org/10.2118/173185-PA.
|
| [17] |
G.A. Al-Muntasheri, H.A. Nasr-El-Din, J.A. Peters, P.L.J. Zitha,Investigation of a high temperature organic water shutoff gel: reaction mechanisms,in:SPE Paper 97530 Presented at the SPE International Improved Oil Recovery Conference, 5e6 December, Kuala Lumpur, Malaysia, 2006.
|
| [18] |
J. Pritchett, H. Frampton, J. Brinkman, S. Cheung, J.C. Morgan, K.T. Chang, D. Williams, J. Goodgame,Field application of a new in-depth waterflood conformance improvement tool, in:SPE Paper 84897 Presented at the SPE International Improved Oil Recovery Conference, 20e21 October, Kuala Lumpur, Malaysia, 2003.
|
| [19] |
M. Simjoo, A.D. Koohi, M.V. Seftie, P.L.J. Zitha,Water shut-off in a fractured system using a robust polymer gel, in:SPE Paper 122280 Presented at the SPE European Formation Damage Conference, 27e29 May, Scheveningen, The Netherlands, 2009.
|
| [20] |
R.D. Sydansk, A.M. Al-Dhafeeri, Y. Xiong, R.S. Seright,Polymer gels formulated with a combination of high and low molecular-weight polymers provide improved performance for water-shutoff treatments of fractured production Wells, in:SPE Paper 89402 Presented at the SPE/DOE Symposium on Improved Oil Recovery, 17e21 April, Tulsa, Oklahoma, 2004.
|
| [21] |
M. Cordova, M. Cheng, J. Trejo, S.J. Johnson, G.P. Willhite, J.T. Liang, C. Berkland, Delayed HPAM gelation via transient sequestration of chromium in polyelectrolyte complex nanoparticles, Macromolecules 41 (2008) 4398-4404.
|
| [22] |
H. Jia, W.F. Pu, J.Z. Zhao, F.Y. Jin, Research on the gelation performance of low toxic PEI cross-linking PHPAM gel systems as water shutoff agents in low temperature reservoirs, Ind. Eng. Chem. Res. 49 (2010b) 9618-9624.
|
| [23] |
G.A. Al-Muntasheri, H.A. Nasr-El-Din, I.A. Hussein, A rheological investigation of a high temperature organic gel used for water shut-off treatments, J. Pet. Sci. Eng. 59 (2007) 73-83.
|
| [24] |
H. Jia, W.F. Pu, J.Z. Zhao, R. Liao, Experimental investigation of the novel phenol-formaldehyde cross-linking HPAM gel system: based on the secondary cross-linking method of organic cross-linkers and its gelation performance study after flowing through porous media, Energy Fuels 25 (2011) 727-736.
|
| [25] |
H. Jia, J.Z. Zhao, F.Y. Jin, W.F. Pu, Y.M. Li, K.X. Li, J.M. Li, New insights into the gelation behavior of polyethyleneimine cross-linking partially hydrolyzed polyacrylamide gels, Ind. Eng. Chem. Res. 51 (2012) 12155-12166.
|
| [26] |
J.Z. Zhao, H. Jia, W.F. Pu, R. Liao, Influences of fracture aperture on the water-shutoff performance of polyethyleneimine cross-linking partially hydrolyzed polyacrylamide gels in hydraulic fractured reservoirs, Energy Fuels 25 (2011) 2616-2624.
|
| [27] |
A. Moradi-Araghi, A review of thermally stable gels for fluid diversion in petroleum production, J. Pet. Sci. Eng. 26 (1) (2000) 1-10.
|
| [28] |
P. Albonico, M. Bartosek, A. Malandrino, S. Bryant, T.P. Lockhart,Studies on phenol-formaldehyde crosslinked polymer gels in bulk and in porous media, in:SPE Paper 28983 Presented at the SPE International Symposium on Oilfield Chemistry, 14e17 February, San Antonio, Texas, 1995.
|
| [29] |
B.R. Reddy, F. Crespo, L. Eoff,Water shutoff at ultralow temperatures using organically crosslinked polymer gels, in:SPE Paper 153155 Presented at the 18th SPE Improved Oil Recovery Symposium, 14e18 April, Tulsa, Oklahoma, USA, 2012.
|
| [30] |
Q. Ren, H. Jia, D. Yu, W.F. Pu, L.L. Wang, B. Li, J.J. Yang, L. Chen, New insights into phenol-formaldehyde-based gel systems with ammonium salt for low temperature reservoirs, J. Appl. Polym. Sci. 131 (2014), http://dx.doi.org/10.1002/APP.40657.
|
| [31] |
F. Crespo, B.R. Reddy, C.A. Lewis, L.S. Eoff,Recent advances in organically crosslinked conformance polymer systems, in:SPE Paper 164115 Presented at the SPE International Symposium on Oilfield Chemistry, 8e10 April, the Woodlands, Texas, 2013.
|
| [32] |
F.Y. Jin, C.D. Yuan, W.F. Pu, Y.Y. Zhang, S. Tang, Y.F. Dong, T.H. Zhao, Y.B. Li, Investigation on gelation process and microstructure for partially hydrolyzed polyacrylic amide (HPAm)eCr (III) acetateemethanal compound crosslinked weak gel, J. Sol Gel Sci. Technol. 73 (2015) 181-191.
|
| [33] |
L.B. Romero-Zeron, F.M. Hum, A. Kantzas, Characterization of crosslinked gel kinetics and gel strength by use of NMR, SPE Reserv. Eval. Eng. 11 (2008) 439-453.
|
| [34] |
Y. Bai, C. Xiong, F. Wei, J. Li, Y. Shu, D. Liu, Gelation study on a hydrophobically associating polymer/polyethylenimine gel system for water shut-off treatment, Energy Fuels 29 (2015) 447-458.
|
| [35] |
F. Uddin, N. Shahid, H. Tahir, Salt effects on the reaction rates of ethyloxalate with hydroxide ions in the presence of sodium and potassium sulfate, Arab. J. Sci. Eng. 27 (2002) 163-172.
|
| [36] |
G.A. Al-Muntasheri, H.A. Nasr-El-Din, K.R. Al-Noaimi, P.L.J. Zitha, A study of polyacrylamide-based gels crosslinked with polyethyleneimine, SPE J. 14 (2009) 245-251.
|
| [37] |
G.A. Al-Muntasheri, H.A. Nasr-El-Din, P.L.J. Zitha, Gelation kinetics and performance evaluation of an organically crosslinked gel at high temperature and pressure, SPE J. 13 (2008) 337-345.
|
| [38] |
C. Dai, G. Zhao, Q. You, M. Zhao, A study on environment-friendly polymer gel for water shutoff treatments in low-temperature reservoirs, J. Appl. Polym. Sci. 131 (2014), http://dx.doi.org/10.1002/app.40154.
|
| [39] |
S.K. Choi,A Study of a PH-Sensitive Polymer for Novel Conformance Control Applications (Ms. thesis), The University of Texas at Austin, 2005.
|
| [40] |
F. Lalehrokh, S.L. Bryant, C. Huh, M.M. Sharma,Application of pH-triggered polymers in fractured reservoirs to increase sweep efficiency, in:SPE Paper 113800 Presented at the SPE Symposium on Improved Oil Recovery, 20e23 April, Tulsa, Oklahoma, USA, 2008.
|
| [41] |
Falk D. O., 1984. Process for selectively plugging permeable zones in a subterranean formation. U.S. Patent 4,485,875.
|
| [42] |
A. Moradi-Araghi, G. Bjornson, P.H. Doe, Thermally stable gels for nearwellbore permeability contrast corrections, SPE Adv. Technol. Ser. 1 (1993) 140-145.
|
| [43] |
S.L. Bryant, M. Bartosek, T.P. Lockhart, Laboratory evaluation of phenoldformaldehyde/polymer gelants for high-temperature applications, J. Pet. Sci. Eng. 17 (1997) 197-209.
|
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