scholarly journals A cost-effective and environmentally sustainable process for phycoremediation of oil field formation water for its safe disposal and reuse

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Bhaskar Das ◽  
Suresh Deka
Keyword(s):  
Algal Species ◽  
Complex Mixture ◽  
Cost Effective ◽  
Oil Field ◽  
Oil Well ◽  
Formation Water ◽  
Safe Disposal ◽  
Initial Inoculum ◽  
Field Formation ◽  
Remediation Process

Abstract High volumes of formation water comprising of complex mixture of hydrocarbons is generated during crude oil exploration. Owing to ecotoxicological concerns, the discharge of the formation water without remediation of hydrocarbonaceous pollutants is not permitted. Keeping this into mind, we carried out phycoremediation of hydrocarbons in formation water so that it can be safely discharged or re-used. For this, a native algal species was isolated from formation water followed by its morphological and 18S ribosomal RNA based identification confirming the algal isolate to be Chlorella vulgaris BS1 (NCBI GenBank Accession No. MH732950). The algal isolate exhibited high biomass productivity of 1.76 gm L−1 d−1 (specific growth rate: 0.21 d−1, initial inoculum: 1500 mg L−1) along with remediation of 98.63% petroleum hydrocarbons present in formation water within 14 days of incubation indicating an efficient hydrocarbon remediation process. Concomitantly, the hydrocarbon remediation process resulted in reduction of 75% Chemical Oxygen Demand (COD) load and complete removal of sulfate from formation water making it suitable for safe disposal or reuse as oil well injection water respectively. The present process overcomes the bottlenecks of external growth nutrient addition or dilution associated with conventional biological treatment resulting in a practically applicable and cost-effective technology for remediation of oil field formation water.

Corrosion of N80 carbon steel in oil field formation water containing CO2 in the absence and presence of acetic acid

2011 ◽  
Vol 53 (10) ◽  
pp. 3156-3165 ◽  
Author(s):  
S.D. Zhu ◽  
A.Q. Fu ◽  
J. Miao ◽  
Z.F. Yin ◽  
G.S. Zhou ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Carbon Steel ◽  
Oil Field ◽  
Formation Water ◽  
Field Formation

Application of bioflocculating property ofPseudomonas aeruginosastrain IASST201 in treatment of oil-field formation water

2014 ◽  
Vol 54 (7) ◽  
pp. 658-669 ◽  
Author(s):  
Mihirjyoti Pathak ◽  
Arundhuti Devi ◽  
Hridip Kumar Sarma ◽  
Banwari Lal
Keyword(s):  
Oil Field ◽  
Formation Water ◽  
Field Formation

scholarly journals Enhancement of A Cationic Surfactant by Capping Nanoparticles: Synthesis, Characterization and Multiple Applications

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2007 ◽  
Author(s):  
A. Labena ◽  
M. A. Hegazy ◽  
W. M. Kamel ◽  
Amr Elkelish ◽  
Wael N. Hozzein
Keyword(s):  
Corrosion Inhibition ◽  
Cationic Surfactant ◽  
Corrosion Inhibitors ◽  
Oil Field ◽  
Metal Corrosion ◽  
Bacterial Biofilms ◽  
Pseudomonas Sp ◽  
Formation Water ◽  
Yeast Strains ◽  
Field Formation

There is scarce information on cationic surfactants’ biocidal and corrosion inhbibition effects on Slime-Forming Bacteria (SFB) isolated from oil field formation water. Therefore, this work focused on the the synthesis of a cationic surfactant (CS) to increase its features by capping different metal nanoparticles (zinc, ZnNPs-C-CS; manganese, MnNPs-C-CS and tin, SnNPs-C-CS) and used them as biocides and corrosion inhibitors. The cationic surfactant was synthesized and characterized by Fourier-Transform Infrared (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopy. Afterwards, different nanoparticles were synthesized, characterized, and exploited to cap by the CS. The CS and the different nanoparticles capped by the CS were tested for their antimicrobial susceptibility against standard bacterial and yeast strains. The synthesized compounds were further evaluated as anti-biofilms agents against positively-developed bacterial biofilms. Moreover, the CS and the ZnNPs-C-CS, MnNPs-C-CS, and SnNPs-C-CS were assessed as potential biocides against SFB, particularly Pseudomonas sp. (isolated from contaminated formation water), and as corrosion inhibitors against cultivated salinity. The results revealed the great effect of the different CS-capped NPs as broad-spectrum antimicrobial and anti-biofilm agents at lower Minimum Inhibitory Concentrations (MICs), Minimum Bactericidal Concentrations (MBCs), Minimum Fungicidal Concentrations (MFCs) and Minimum Biofilm Inhibitory Concentrations (MBICs), and the activities were reported in order of SnNPs-C-CS > MnNPs-C-CS > ZnNPs-C-CS > CS. Furthermore, the ZnNPs-C-CS, MnNPs-C-CS, and SnNPs-C-CS demonstrated biocidal and corrosion inhibition effects against Pseudomonas sp. at a salinity of 3.5% NaCl, with metal corrosion inhibition efficiencies of 88.6, 94.0 and 96.9%, in comparison to a CS efficiency of 85.7%. In conclusion, the present work provides a newly synthesized cationic surfactant and has enhanced its antimicrobial and its metal corrosion inhibition effects by capping different nanoparticles, and it has been successfully applied against slime-forming bacteria at a salinity of 3.5% NaCl.

scholarly journals Experience in conducting multi-zone hydraulic fracturing on the oilfield of PJSC «Tatneft»

2021 ◽  
pp. 68-76
Author(s):  
L.S. Kuleshova ◽  
◽  
I.G. Fattakhov ◽  
Sh.Kh. Sultanov ◽  
R.U. Rabaev ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Oil Recovery ◽  
Cost Effective ◽  
Geological Structure ◽  
Oil Field ◽  
Oil Well ◽  
Oil Reserves ◽  
Long Time ◽  
Effective Level ◽  
Test Graph

The paper presents the possibilities of expanding production opportunities in the oil company PJSC Tatneft. For this purpose, the well No.xxx7g with an inclined pilot borehole was drilled at the Bavlinskoye oil field and oriented core samples were taken to study the lithological cross-section and the geological structure of the subsurface horizons. The horizontal wellbore itself is located in the dankovo-lebedyansky horizon, where multi-zone hydraulic fracturing was carried out through ports with packers there. The following methods will increase the share of recoverable oil reserves in the oldest oil-producing Volga region by starting the development of new productive horizons and increase the oil recovery factors for these reservoirs. The methods used in this work will reduce the unit costs of increasing oil production and achieve a cost-effective level of work on wells of this type. The work had its own peculiarities. One of the reasons for the difficulty in interpreting the hydraulic fracturing Minifrac (Meyer software package) was the rather long time of closing fractures in domanic deposits during the registration of pressure drop. In turn, during the minifrac analysis of the Nolte G Time Test graph showed that the fracture did not close, and therefore it is impossible to determine the closing pressure (the pressure gradient of the gap) with reliable accuracy. Note that when interpreting the flow test results, the best match of the experimental and calculated curves is achieved when using the model of a horizontal well operating a homogeneous reservoir. Also, the deterioration of the bottom-hole zone may be associated with a weak opening of the created fractures. Keywords: oil; well; hydraulic fracturing; unconventionals; fracture; core.

scholarly journals Corrosion Behavior of Austenitic Stainless Steels in CO2-Saturated Synthetic Oil Field Formation Water

2019 ◽  
Vol 22 (4) ◽  
Author(s):  
Jorge Luiz Cardoso ◽  
Marcel Mandel ◽  
Lutz Krüger ◽  
Luís Flávio Gaspar Herculano ◽  
Pedro de Lima Neto ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Oil Field ◽  
Formation Water ◽  
Synthetic Oil ◽  
Field Formation

Downhole CO2 partial pressure calculation and tubing material selection – a case study of an offshore oil field in the South China Sea

2016 ◽  
Vol 63 (5) ◽  
pp. 414-420 ◽  
Author(s):  
Wei Yan ◽  
Yong Xiang ◽  
Wenliang Li ◽  
Jingen Deng
Keyword(s):  
Partial Pressure ◽  
Pressure Profile ◽  
Field Application ◽  
Separation Process ◽  
Oil Field ◽  
Oil Well ◽  
Content Type ◽  
Calculating Method ◽  
Oil Gas

Purpose This paper aims to establish the downhole CO2 partial pressure profile calculating method and then to make an economical oil country tubular goods (OCTG) anti-corrosion design. CO2 partial pressure is the most important parameter to the oil and gas corrosion research for these wells which contain sweet gas of CO2. However, till now, there has not been a recognized method for calculating this important value. Especially in oil well, CO2 partial pressure calculation seems more complicated. Based on Dolton partial pressure law and oil gas separation process, CO2 partial pressure profile calculating method in oil well is proposed. A case study was presented according to the new method, and two kinds of corrosion environment were determined. An experimental research was conducted on N80, 3Cr-L80 and 13Cr-L80 material. Based on the test results, 3Cr-L80 was recommended for downhole tubing. Combined with the field application practice, 3Cr-L80 was proved as a safety and economy anti-corrosion tubing material in this oil field. A proper corrosion parameter (mainly refers to CO2 partial pressure and temperature) can ensure a safety and economy downhole tubing anti-corrosion design. Design/methodology/approach Based on Dolton partial pressure law and oil gas separation process, CO2 partial pressure profile calculating method in oil well is proposed. An experimental research was conducted on N80, 3Cr-L80 and 13Cr-L80 material. A field application practice was used. Findings It is necessary to calculate the CO2 partial pressure properly to ensure a safety and economy downhole tubing (or casing) anti-corrosion design. Originality/value The gas and oil separation theory and corrosion theory are combined together to give a useful method in downhole tubing anti-corrosion design method.

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