Field Application of a Novel Emulsified Scale Inhibitor System to Mitigate Calcium Carbonate Scale in a Low Temperature, Low Pressure Sandstone Reservoir in Saudi Arabia

2002 ◽  
Author(s):  
H.A. Nasr-El-Din ◽  
J.D. Lynn ◽  
M.K. Hashem ◽  
G. Bitar
Keyword(s):  
Saudi Arabia ◽  
Calcium Carbonate ◽  
Low Temperature ◽  
Low Pressure ◽  
Field Application ◽  
Scale Inhibitor ◽  
Inhibitor System ◽  
Sandstone Reservoir ◽  
Calcium Carbonate Scale

Inhibition of Calcium Carbonate Scale Using an Environmental Friendly Scale Inhibitor

2017 ◽  
Vol 54 (3) ◽  
pp. 238-241 ◽  
Author(s):  
Huchuan Wang ◽  
Chengjun Peng ◽  
Yujuan Jian ◽  
Chenchen Fang ◽  
Xianna Wang ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Scale Inhibitor ◽  
Environmental Friendly ◽  
Calcium Carbonate Scale

A Calcium Carbonate Scale Inhibitor for Direct-Contact Binary Geothermal Service

1983 ◽  
Vol 35 (08) ◽  
pp. 1546-1552
Author(s):  
Michael H. Auerbach ◽  
Robert A. Reimer ◽  
Robert G. Olander ◽  
Pascal M. Rapier
Keyword(s):  
Calcium Carbonate ◽  
Direct Contact ◽  
Scale Inhibitor ◽  
Contact Binary ◽  
Calcium Carbonate Scale

Evaluation of a polymaleic-based scale inhibitor (HPMA-AEO-9) against calcium carbonate scale

2019 ◽  
Vol 145 ◽  
pp. 120-133 ◽  
Author(s):  
Chen-Guo Zhu ◽  
Wei-Dong Zhao ◽  
Hong-Bin Liu ◽  
Yao Che ◽  
Liang-Bi Wang ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Scale Inhibitor ◽  
Calcium Carbonate Scale

Novel Scale Inhibitor Extends Treatment Lifetimes in Permian EOR

2021 ◽  
Vol 73 (08) ◽  
pp. 38-40
Author(s):  
Paula Guraieb ◽  
Ross Tomson ◽  
Anna Courville ◽  
Vaibhav Nikam ◽  
John Kennedy ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Calcium Sulfate ◽  
Effective Field ◽  
Field Application ◽  
Core Material ◽  
Co2 Flooding ◽  
Scale Inhibitor ◽  
Data Set ◽  
Minimum Effective Concentration ◽  
Group 2

Background A new extended-release (ER) scale-inhibitor technology showing significantly increased lifetimes has been applied in the Permian Basin. Tomson Technologies and Group 2 Technologies, in partnership with Occidental Petroleum (Oxy), implemented a scale-squeeze program for this carrier system. It allows for fewer squeeze treatments, which results in lower chemical usage, decreased plugging risk, and reduced environmental impact. Squeeze programs are an effective field treatment strategy to prevent scale formation in wells for extended periods of time. However, in some cases, squeeze lifetimes can be short, leading to frequent re-squeezing and production decreases, lowering overall economic recoveries. The ER phosphonate-based chemistry (SI1313) was used in selected wells where incumbent (previous chemical provider) treatment lifetimes were shorter than expected. The incumbent squeeze volumes and additives were used, and the scale-inhibitor (SI) chemistry was replaced with SI1313 to obtain directly comparable results. The wells selected are vertical wells, with predominantly carbonate mineralogy and 14–18% porosity and 9–16 mD permeability. Bottomhole temperature is 105°F (40°C). These wells are under continuous CO2 flooding operations, and the scales of interest are calcium carbonate and calcium sulfate predominantly. The selected wells were targeted to have a good squeeze history for comparison and stable water production. Pre-Job Validation Work Coreflood laboratory experiments were performed to simulate the adsorption and desorption under these specific Oxy Permian conditions. The coreflood showed over 10,000 pore volume (PV) of flow with inhibitor concentration remaining above the minimum effective concentration (MEC) during the entire run. Once greater than two times incumbent performance was reached, the coreflood was stopped, although the return concentration was still above MEC. For reference, corefloods with incumbent phosphonate chemistry under the same conditions usually drop below MEC around approximately 3,000–5,000 PVs. The adsorption of SI1313 to core material was measured during the coreflood experiment and the results show 12.5 mg of inhibitor adsorbed per gram of core material. As a comparison, a typical incumbent phosphonate scale inhibitor adsorbs 1–2 mg of inhibitor per gram of core material. This increase in adsorption is considered a large improvement over traditional chemistry. The carrier platform’s superior adsorption, when combined with controlled desorption, is the basis for extending the lifetimes of scale- inhibitor treatments. The corefloods results validate the ER characteristics expected from SI1313 and allowed for field squeezes to be conducted. Field Application Group 2 Technologies provided SI1313 to be squeezed for Oxy in January 2020, into five vertical conventional wells. The selected wells are in one area where CO2 flooding is in place and there is risk of calcium carbonate (CaCO3) and calcium sulfate (CaSO4) scaling. These wells have had many scale squeezes performed on them, yielding an excellent data set to compare against. The goal of this trial was to show significant lifetime extension compared to previous incumbent squeeze lifetimes.

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