Water treatment technology performance for chemical enhanced oil recovery: modeling, simulation and optimization

AbstractThe use of ASP (alkali–surfactant–polymer) slug could be affected by the use of high hardness water, especially when injecting an alkaline agent (Na2CO3). The injection water quality of the TFT field is not adequate for cEOR (chemical enhanced oil recovery), because it contains a high hardness rate up to 160°f (report DC R&D 2019). With a TDS rate varying between 4 and 6 g/l, it could cause a formation of insoluble complexes with alkaline agents, and on the other hand, the decrease in the performances of the injected surfactants and polymers. In this work, a simulation study was carried out in order to identify the most adequate treatment process between NF (nanofiltration) and RO (reverse osmoses). The performance of the 4040 type membrane modules has been tested under different operating conditions of temperature and feed pressure (25°–45°) and (3.1–22 bar), respectively. Several membrane configurations (6:0, 4:2) have been tested to determine their effect on the process’ performance. The results showed that the NF90 4040 presents the best performances toward the requirements of the cEOR. Furthermore, the membrane configuration effects the quality of permeate and recovery rate. The results showed a rejection rate of 90% and 95%, respectively, for the total hardness (Ca2+ and Mg2+) and the sulfate.

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Characteristics of a Geobacillus sp. as an Enhanced Oil Recovery Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.496.542 ◽

2012 ◽

Vol 496 ◽

pp. 542-545

Author(s):

Xiang Ping Kong

Keyword(s):

Crude Oil ◽

Enhanced Oil Recovery ◽

Oil Recovery ◽

Sewage Treatment ◽

Core Flooding ◽

Treatment Technology ◽

Promising Candidate ◽

Different Types ◽

Displacement Experiments ◽

Original Oil In Place

The enhanced oil recovery characteristics of a Geobacillus sp. was investigated by shake flask experiments, blind-tube oil displacement experiments and core flooding tests. The strain exhibited good properties such as resisting high temperature, taking different types of crude oil as the sole carbon source, reducing the viscosity of crude oil, emulsifying and dispersing crude oil or liquid wax. The oil in the dead area could be effectively driven out by the strain, and the oil recovery of original oil in place had been increased by 12.9-15.9% after 5 treatments in 50 days by adopting air-assistant technique (air/liquid 10:1, v/v) due to the synergistic effect of the bacteria and their metabolites such as biogas and biosurfactants. The strain seems to be a promising candidate for microbial enhanced oil recovery and underground sewage treatment technology.

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Modifikasi SLS dengan epoksida dari asam oleat dan hidrogen peroksida untuk meningkatkan kualitas surfaktan pada EOR

Jurnal Teknik Kimia Indonesia ◽

10.5614/jtki.2011.10.3.5 ◽

2018 ◽

Vol 10 (3) ◽

pp. 141

Author(s):

Chitra Ria Ariska ◽

Suryo Purwono ◽

Bardi Murachman

Keyword(s):

Enhanced Oil Recovery ◽

Oil Recovery ◽

Chemical Compounds ◽

Peroxyacetic Acid ◽

Temperature Ratio ◽

Aqueous Hydrogen Peroxide ◽

The Stability ◽

Ultralow Ift ◽

Excellent Stability

SLS modification using epoxyde from oleat acid and hydrogen peroxyde to improve the quality of surfactant in EORSurfactant is one of the compounds used in Enhanced Oil Recovery (EOR) which function is to enhance the oil production. One of the surfactants widely used is Sodium Ligno Sulfonat (SLS) due to its high degradability. However the modification with another compound is still needed in orderto decrease its Inter Facial Tension (IFT) until reach the ultralow IFT(±10-3 mN/m). One of the chemical compounds used to modify the surfactant is epoxidebecause it has reactive oxirane ring. The addition of oleic epoxide will increase solubility of surfactant in oil so it brings more stable microemulsion. Epoxidation of oleic acid was carried out with peroxyacetic acid that was generated insitu from aqueous hydrogen peroxide and glacial acetic acid. The modification of SLS was then done by adding the epoxide in various conversion resulted from epoxidation. The experiment was investigated at temperature, ratio of epoxide to SLS and reaction time of 70oC, 1:2 and 1 hour, respectively. The modified product were then measured their IFTat temperature of 30-60oC and tested the stability of microemulsion based on time of formation of microemulsion up back in its original state. The present study revealed that epoxides has capability to decrease IFT. The results of experiment shows that the lowest IFT is modification of epoxide with the conversion of 10% as 3,7 x10-3 mN/m and has most excellent stability with time 113 minutes.Keywords: epoxide, Sodium Ligno Sulfonat (SLS), microemulsion, surfactant, EOR AbstrakSurfaktan adalah salah satu bahan kimia yang digunakan dalam Enhanced Oil Recovery (EOR) untuk meningkatkan produksi minyak. Salah satu jenis surfaktan yang banyak digunakan adalah Sodium Ligno Sulfonat (SLS) karena mudah didegradasi limbahnya. Namun modifikasi dengan senyawa lain masih perlu dilakukan untuk menurunkan tegangan antarmuka atau Inter Facial Tension (IFT) hingga mencapai ultralow IFT (±10-3 mN/m). Salah satu bahan kimia yang dapat digunakan untuk modifikasi surfaktan adalah epoksida karena memiliki cincin oksiren yang reaktif. Penambahan epoksi oleat ini akan meningkatkan kelarutan surfaktan dalam minyak sehingga didapatkan mikroemulsi yang lebih stabil. Modifikasi SLS dibuat dengan menambahkan epoksida dengan variasi konversi yang dihasilkan dari proses epoksidasi. Percobaan dilakukan pada temperatur 70oC, rasio perbandingan epoksida:SLS adalah 1:2 dengan waktu reaksi 1 jam. IFT produk modifikasi diukur pada temperatur 30-60oC dan diuji kestabilan mikroemulsinya berdasarkan waktu pembentukan mikroemulsi sampai kembali pada keadaan semula. Dari penelitian didapatkan bahwa epoksida dapat menurunkan IFT. IFT paling rendah dihasilkan dari modifikasi epoksida dengan konversi 10%, yaitu 3,7 x10-3 mN/m dan memiliki kestabilan paling baik dengan waktu emulsi 113 menit.Kata kunci: epoksida, Sodium Ligno Sulfonat (SLS), mikroemulsi, surfaktan, EOR

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Horizontal Versus Vertical Wells: Assessment of Sweep Efficiency in a Multi-Layered Reservoir Based on Consecutive Inter-Well Tracer Tests - A Comparison Between Water Injection and Polymer EOR

10.2118/205211-ms ◽

2021 ◽

Author(s):

Bogdan-George Davidescu ◽

Mathias Bayerl ◽

Christoph Puls ◽

Torsten Clemens

Keyword(s):

Enhanced Oil Recovery ◽

Oil Recovery ◽

Tracer Tests ◽

Horizontal Wells ◽

Operating Conditions ◽

Sweep Efficiency ◽

Flow Paths ◽

Full Field ◽

Polymer Injection ◽

The Impact

Abstract Enhanced Oil Recovery pilot testing aims at reducing uncertainty ranges for parameters and determining operating conditions which improve the economics of full-field deployment. In the 8.TH and 9.TH reservoirs of the Matzen field, different well configurations were tested, vertical versus horizontal injection and production wells. The use of vertical or horizontal wells depends on costs and reservoir performance which is challenging to assess. Water cut, polymer back-production and pressures are used to understand reservoir behaviour and incremental oil production, however, these data do not reveal insights about changes in reservoir connectivity owing to polymer injection. Here, we used consecutive tracer tests prior and during polymer injection as well as water composition to elucidate the impact of various well configurations on sweep efficiency improvements. The results show that vertical well configuration for polymer injection and production leads to substantial acceleration along flow paths but less swept volume. Polymer injection does not only change the flow paths as can be seen from the different allocation factors before and after polymer injection but also the connected flow paths as indicated by a change in the skewness of the breakthrough tracer curves. For horizontal wells, the data shows that in addition to acceleration, the connected pore volume after polymer injection is substantially increased. This indicates that the sweep efficiency is improved for horizontal well configurations after polymer injection. The methodology leads to a quantitative assessment of the reservoir effects using different well configurations. These effects depend on the reservoir architecture impacting the changes in sweep efficiency by polymer injection. Consecutive tracer tests are an important source of information to determine which well configuration to be used in full-field implementation of polymer Enhanced Oil Recovery.

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Numerical Simulation and Optimization of Enhanced Oil Recovery by the In Situ Generated CO2Huff-n-Puff Process with Compound Surfactant

Journal of Chemistry ◽

10.1155/2016/6731848 ◽

2016 ◽

Vol 2016 ◽

pp. 1-13 ◽

Cited By ~ 5

Author(s):

Yong Tang ◽

Zhengyuan Su ◽

Jibo He ◽

Fulin Yang

Keyword(s):

Enhanced Oil Recovery ◽

Oil Recovery ◽

History Matching ◽

Injection Rate ◽

Thermal Recovery ◽

Chemical Flooding ◽

Core Flooding ◽

Daily Production ◽

Simulation And Optimization

This paper presents the numerical investigation and optimization of the operating parameters of the in situ generated CO2Huff-n-Puff method with compound surfactant on the performance of enhanced oil recovery. First, we conducted experiments of in situ generated CO2and surfactant flooding. Next, we constructed a single-well radial 3D numerical model using a thermal recovery chemical flooding simulator to simulate the process of CO2Huff-n-Puff. The activation energy and reaction enthalpy were calculated based on the reaction kinetics and thermodynamic models. The interpolation parameters were determined through history matching a series of surfactant core flooding results with the simulation model. The effect of compound surfactant on the Huff-n-Puff CO2process was demonstrated via a series of sensitivity studies to quantify the effects of a number of operation parameters including the injection volume and mole concentration of the reagent, the injection rate, the well shut-in time, and the oil withdrawal rate. Based on the daily production rate during the period of Huff-n-Puff, a desirable agreement was shown between the field applications and simulated results.

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A study of the effects of enhanced oil recovery agents on the quality of Strategic Petroleum Reserves crude oil. Final technical report

10.2172/10146597 ◽

1992 ◽

Author(s):

V.N. Kabadi

Keyword(s):

Crude Oil ◽

Enhanced Oil Recovery ◽

Oil Recovery ◽

Technical Report ◽

Petroleum Reserves

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Design, Fabrication, and Optimization of Jatropha Sheller

An International Journal of Optimization and Control Theories & Applications (IJOCTA) ◽

10.11121/ijocta.01.2012.0075 ◽

2012 ◽

Vol 2 (2) ◽

pp. 113-127 ◽

Cited By ~ 1

Author(s):

Richard P. TING ◽

Ed Vidona CASAS ◽

Engelbert K. PERALTA ◽

Jessie C. ELAURIA

Keyword(s):

Moisture Content ◽

Oil Recovery ◽

Operating Conditions ◽

Energy Utilization ◽

Operation Performance ◽

Roller Speed ◽

Acceptable Quality ◽

Density Factor ◽

Response Variables

A jatropha sheller was designed, fabricated, and optimized consisting of mainframe, rotary cylinder, stationary cylinder, transmission system powered by 1kW variable speed electric motor with feasibility of manual operation. Performance evaluation considered moisture content, clearance, and roller speed as independent parameters while the responses comprised of recovery, bulk density factor, shelling capacity, energy utilization of sheller, whole kernel recovery, oil recovery, and energy utilization by extruder. Moisture contents from 9.5 to 16.5%wb failed to affect the response variables. The clearance affected the response variables except energy utilization of the extruder. The roller speed affected shelling capacity, whole kernel recovery, and energy utilization of the extruder. Optimization of shelling and extrusion operations resulted in operating conditions of 9.5%wb moisture content, clearance of 6 mm, and a roller speed of 750 rpm with acceptable quality of shelled kernels.

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Novel Large-Hydrophobe Alkoxy Carboxylate Surfactants for Enhanced Oil Recovery

SPE Journal ◽

10.2118/154261-pa ◽

2014 ◽

Vol 19 (06) ◽

pp. 1024-1034 ◽

Cited By ~ 34

Author(s):

Jun Lu ◽

Christopher Britton ◽

Sriram Solairaj ◽

Pathma J. Liyanage ◽

Do Hoon Kim ◽

...

Keyword(s):

Enhanced Oil Recovery ◽

Oil Recovery ◽

High Salinity ◽

High Hardness ◽

Excellent Performance ◽

New Class ◽

Naturally Occurring ◽

Reservoir Conditions ◽

Ultralow Interfacial Tension ◽

Harsh Conditions

Summary A new class of surfactants has been developed and tested for chemical enhanced oil recovery (EOR) that shows excellent performance under harsh reservoir conditions. These novel Guerbet alkoxy carboxylate (GAC) surfactants fulfill this need by providing large, branched hydrophobes; flexibility in the number of alkoxylate groups; and stability in both alkaline and nonalkaline environments at temperatures up to at least 120°C. The new carboxylate surfactants were recently manufactured at a cost comparable to other commercial EOR surfactants by use of commercially available feedstocks. A formulation containing the combination of a carboxylate surfactant and a sulfonate cosurfactant resulted in a synergistic interaction that has the potential to reduce the total chemical cost further. One can obtain both ultralow interfacial tension (IFT) with the oils and a clear aqueous solution (even under harsh conditions such as high salinity, high hardness, and high temperature with or without alkali) with these new large-hydrophobe alkoxy carboxylate surfactants. Both sandstone and carbonate corefloods were conducted, with excellent results. Formulations were developed for both active oils (contains naturally occurring carboxylic acids) and inactive oils (oils that do not produce sufficient amounts of soap/carboxylic acid), with excellent results.

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