Synthesis and laboratory testing of a novel calcium-phosphonate reverse micelle nanofluid for oilfield mineral scale control

RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 39883-39895 ◽  
Author(s):  
Ping Zhang ◽  
Dong Shen ◽  
Amy T. Kan ◽  
Mason B. Tomson
Keyword(s):  
Reverse Micelle ◽  
Laboratory Testing ◽  
Scale Inhibitor ◽  
Mineral Scale ◽  
Water Cut ◽  
Scale Control

Developed calcium-phosphonate scale inhibitor reverse micelle nanomaterial for oilfield mineral scale control in low water cut or water sensitive wells.

Calcite Scale Mitigation in a Very Low Watercut, Low Salinity, HPHT Environment: Lessons Learned in Surveillance, Mitigation and Scale Inhibitor Performance Monitoring for an Onshore Field

2021 ◽  
Author(s):  
Jonathan J. Wylde ◽  
Alexander R. Thornton ◽  
Mark Gough ◽  
Rifky Akbar ◽  
William A. Bruckmann
Keyword(s):  
High Temperature ◽  
Calcium Carbonate ◽  
Laboratory Testing ◽  
Lessons Learned ◽  
Management Decision ◽  
Scale Inhibitor ◽  
Monitoring Programs ◽  
Mineral Scale ◽  
Water Cut ◽  
Scale Control

Abstract A prolific Southeast Asia onshore oilfield has enjoyed scale free production for many years before recently experiencing a series of unexpected and harsh calcite scaling events. Well watercuts were barely measurable, yet mineral scale deposits accumulated quickly across topside wellhead chokes and within downstream flowlines. This paper describes the scale management experience, and the specific challenges presented by this extraordinarily low well water cut, low pH, calcium carbonate scaling environment. To the knowledge of the authors, no previous literature works have been published regarding such an unusual and aggressive mineral scale control scenario. A detailed analysis of the scaling experience is provided, including plant layout, scaling locations, scale surveillance and monitoring programs, laboratory testing, product selection and implementation, and scale inhibitor efficacy surveillance and monitoring programs. The surveillance and application techniques themselves are notable, and feature important lessons learned for addressing similar very low water cut and moderate pH calcium carbonate scaling scenarios. For example, under ultra-low watercut high temperature well production conditions, it was found that a heavily diluted scale inhibitor was necessary to achieve optimum scale control, and a detailed laboratory and field implementation process is described that led to this key learning lesson. The sudden and immediate nature of the occurrence demanded a fast-track laboratory testing approach to rapidly identify a suitable scale inhibitor for the high temperature topside calcium carbonate scaling scenario. The streamlined selection program is detailed, however what could not be readily tested for via conventional laboratory testing was the effect of <1% water cut, and how the product would perform in that environment. A risk-managed field surveillance program was initiated to determine field efficiency of the identified polymeric scale inhibitor and involved field-trialing on a single well using a temporary restriction orifice plate (ROP) to modify the residence time of the injected chemical. The technique proved very successful and identifed that product dispersibility was important, and that dilution of the active scale inhibitor had a positive effect on dispersibility for optimum inhibitor action. The lessons learned were rolled out to all at-risk field producers with positive results. The ongoing success of this program continues and will be detailed in the manuscript and presentation. This paper demonstrates a unique situation of calcium carbonate scale formation and control that utilized a previously unreported and analytical surveillance approach. The cumulative performance derived by improving not only chemical selection, but the way the wells were managed via surveillance and chemical management decision making processes is compelling and of value to other production chemists working in the scaling arena.

Transport and return of an oilfield scale inhibitor reverse micelle nanofluid: impact of preflush and overflush

RSC Advances ◽  
2016 ◽  
Vol 6 (71) ◽  
pp. 66672-66681 ◽  
Author(s):  
Ping Zhang ◽  
Gedeng Ruan ◽  
Dong Shen ◽  
Amy T. Kan ◽  
Mason B. Tomson
Keyword(s):  
Reverse Micelle ◽  
Systematic Evaluation ◽  
Scale Inhibitor ◽  
Return Behavior ◽  
Mineral Scale ◽  
Scale Control

Systematic evaluation of the transport and return behavior of a Ca–DTPMP reverse micelle nanomaterial and nanofluid for oilfield mineral scale control.

Development of a Mineral Scale Inhibitor

CORROSION ◽  
1961 ◽  
Vol 17 (5) ◽  
pp. 232t-236t ◽  
Author(s):  
L. W. JONES
Keyword(s):  
Laboratory Testing ◽  
Calcium Sulfate ◽  
Testing Device ◽  
Scale Inhibitor ◽  
Surface Active Agents ◽  
Calcium Sulfate Scale ◽  
Surface Active ◽  
Mineral Scale ◽  
Calcium Carbonate Scale ◽  
Methods Of Control

Abstract The expense attributable to scaling in oil producing operations totals many millions of dollars annually. Causes of precipitation and deposition are fairly well understood but better methods of control are needed. In order to evaluate chemical scale inhibitor components, a laboratory testing device was designed. Performance of sequestrants, surface active agents, colloids, and mixed compounds in the laboratory tester are discussed. Polyphosphates and sodium carboxymethyl cellulose proved effective for calcium carbonate scale and calcium sulfate scale, respectively. Results of tests made over a period of several years led to the development of an inhibitor composition that is capable of inhibiting both carbonate and sulfate scales. The inhibitor is now in field use. 5.8.2, 3.2.3, 8.4.3

Functional scale inhibitor nanoparticle capsule delivery vehicles for oilfield mineral scale control

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43016-43027 ◽  
Author(s):  
Ping Zhang ◽  
Gedeng Ruan ◽  
Amy T. Kan ◽  
Mason B. Tomson
Keyword(s):  
Building Blocks ◽  
Scale Inhibitor ◽  
Functional Scale ◽  
Polymer Nanoparticle ◽  
Polymer Aggregates ◽  
Delivery Vehicles ◽  
Mineral Scale ◽  
Scale Control

This study synthesized phosphonate–polymer nanoparticle capsules using SiO2 nanoparticles as the building blocks and polymer aggregates as the template for the purpose of oilfield mineral scale control.

Phosphino-polycarboxylic acid modified inhibitor nanomaterial for oilfield scale control: transport and inhibitor return in formation media

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59195-59205 ◽  
Author(s):  
Ping Zhang ◽  
Dong Shen ◽  
Amy T. Kan ◽  
Mason B. Tomson
Keyword(s):  
Polycarboxylic Acid ◽  
Scale Inhibitor ◽  
Return Behavior ◽  
Mineral Scale ◽  
Scale Control

Evaluation of the transport and return behavior of phosphino-polycarboxylic acid modified scale inhibitor nanomaterial for oilfield mineral scale control.

Enhanced transport of novel crystalline calcium-phosphonate scale inhibitor nanomaterials and their long term flow back performance in laboratory squeeze simulation tests

RSC Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 5259-5269 ◽  
Author(s):  
Ping Zhang ◽  
Amy T. Kan ◽  
Mason B. Tomson
Keyword(s):  
Scale Inhibitor ◽  
Mineral Scale ◽  
Scale Control

Prepared crystalline Si–Ca–DTPMP scale inhibitor nanomaterials with enhanced transportability and extended squeeze lifetime potentially for oilfield mineral scale control.

Pre-Production Deployed Scale Inhibition Treatments in Deep-Water, West Africa

2014 ◽  
Author(s):  
D.. Patterson ◽  
W.. Williams ◽  
M.. Jordan ◽  
R.. Douglas
Keyword(s):  
West Africa ◽  
Deep Water ◽  
Best Practice ◽  
Barium Sulphate ◽  
Scale Inhibitor ◽  
Monitoring Methods ◽  
Initial Water ◽  
Scale Inhibition ◽  
Production Wells ◽  
Scale Control

Abstract The injection of seawater into oil-bearing reservoirs in order to maintain reservoir pressure and improve secondary recovery is a well-established, mature operation. Moreover, the degree of risk posed by deposition of mineral scales (carbonate/sulphate) to the injection and production wells during such operations has been much studied. The current deep-water subsea developments offshore West Africa and Brazil have brought into sharp focus the need to manage scale in an effective way. In a deepwater West African field the relatively small number of high-cost, highly productive wells, coupled with a high barium sulphate scaling tendency upon breakthrough of injection seawater meant not only was effective scale management critical to achieve high hydrocarbon recovery, but even wells at low water cuts have proven to be at sufficient risk to require early squeeze application. To provide effective scale control in these wells at low water cuts, phosphonate-based inhibitors were applied as part of the acid perforation wash and overflush stages prior to frac packing operations. The deployment of this inhibitor proved effective in controlling barium sulphate scale formation during initial water production eliminating the need to scale squeeze the wells at low water cuts (<10% BS&W). To increase the volumes of scale inhibitor being deployed in the pre-production treatments and so extend the treatment lifetimes scale inhibitor was also added to the frac gel used to carry the frac sand. This paper outlines the selection methods for the inhibitor chemical for application in frac fluids in terms of rheology, retention/release, formation damage and presents the chemical returns profile from the 5 wells treated (some treatments lasting > 300 days) along with monitoring methods utilized to confirm scale control in the wells treated. Many similar fields are currently being developed in the Campos basin, Gulf of Mexico, and West Africa, and this paper is a good example of best-practice sharing from another oil basin.

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