Development and Application of a Silicate Scale Inhibitor for ASP Flooding Production Scale

Jia, Qingxuan; Zeng, Bin; Zhang, Ronglan; Chen, Zhongxi; Zhou, Yuchun

doi:10.2523/74675-ms

Cited by 8 publications

(4 citation statements)

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“…From a thermodynamic point of view, there is a stable region, a met stable region and an unstable region, separated by the binodale curve and the spinodale curve, respectively (Fink, 2003). (Jia et al, 2002) Residue Composition, % Table 1 below shows the scaling characteristics of oil wells in different stages. In the initial scaling stage, carbonate precipitation is the dominant scale, accounting for over 50%, while silicon scale accounts for around 20%.…”

Section: Scale Composition and Descriptionmentioning

confidence: 99%

“…Meeting this neutral connate water neutralizes the high pH alkaline water. This pH reduction results in Polymerization of dissolved silica and form colloidal silica nanoparticle (Jia et al, 2002;Arensdorf et al, 2011). Miner and Kerr (2012) has reported that the reaction yielding this silicic acid dimer is kinetically slow, in contrast to the reaction giving trimer, tetramer and pentamer which are very fast.…”

Section: Silicate Scale Formation During Asp Floodingmentioning

confidence: 99%

“…Despite the recorded successes, yet it is not without challenging problems troubling the production engineers. The formation of strong emulsions and excessive formation of silicate scale especially with the current higher concentration of alkali has become noticeable (Wang et al, 2004;Karazincir et al, 2011;Jia et al, 2002;Stoll et al, 2011;Arensdorf et al, 2010;Arensdorf et al, 2011). Chemical flooding is associated with several operational issues.…”

Section: Introductionmentioning

confidence: 99%

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Silicate Scales Formation During ASP Flooding: A Review

Umar¹,

Saaid²

2013

RJASET

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This study reviewed and assessed some of the inhibition techniques used in the industry with regards to handling oilfield scales in general and silicates scales in particular. Conventional scale inhibitors used are facing restrictions world over, due to their ecotoxicity and non-biodegradability, which has led to the call for green scale inhibition in the oil and industry. Due to the inefficiency of the conventional primary and secondary recovery methods to yield above 20-40% OOIP, the need for Enhanced Oil Recovery (EOR) techniques to recover a higher proportion of the Oil Originally in Place (OOIP) has become vital. Alkaline/Surfactant/Polymer (ASP) is one of such techniques and has proven successful due to its ability to raise displacement and sweep efficiency. Despite its popularity as a potentially cost-effective chemical flooding method, it is not without (its) problems, one of which is the excessive formation of silicate scales. Silicate scale is a very serious problem in the oil and gas industry; which forms in perforation holes, casing surface, tubing and surface facilities. During an ASP flood, as the flood progresses into the production well, liquid produced from different layers intermingle, leading to a rapid decrease in the pH value of the mixed waters. Other factors such as temperature, pressure, divalent cations present also play some roles, but pH variation plays the major role. These among other factors facilitate precipitation of silicates and its deposition on tubing, surface pipeline, pumps and surface production facilities resulting in excessive production loss; increasing the average work over periods, which influences the production and causes low commercial effectiveness. Green scale inhibitors are considered as alternative scale inhibitors due to their value-added benefits to the environment with respect to the methods of treating oilfield scales. It is recommended that the industry should shift to the green technology as an alternative scale inhibition method so as to protect the environment.

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Section: Scale Composition and Descriptionmentioning

confidence: 99%

Section: Silicate Scale Formation During Asp Floodingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Silicate Scales Formation During ASP Flooding: A Review

Umar¹,

Saaid²

2013

RJASET

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“…For ASP Flooding, strong base has synergistic effect which using NaOH as alkali agent, but also brought many negative effects. For example, the viscosity of the system decreased, and scaling in the oil well and oil reservoir was restricted to the promotion and application of the compound flooding [1,2] .So it is necessary to replaced by weak base which using Na 2 CO 3 as alkali agent. Weak base ASP flooding has been applied in the field text of Daqing Oilfield, this technology has obtained certain result.…”

Section: Introductionmentioning

confidence: 99%

Study on the interface characteristics of the weak base ASP flooding produced liquid

He¹,

Liang²,

Lv³

et al. 2016

Proceedings of the 2016 International Conference on Civil, Transportation and Environment

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ASP flooding has been proved to be an effective method to enhance oil recovery. But residual alkaline in produced liquid have resulted in stable crude oil emulsion, the difficulty of separating oil and water is obviously increased. Based on interface tension experiment, emulsification experiment and potential experiment, this paper studied the weak base ASP flooding. Experimental results show that: the stronger the alkalinity, the greater the degree of emulsification, the more stable the emulsion, the more difficult to separate water and oil. The emulsifying capacity of weak base ASP flooding is less than strong base ASP flooding.

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