Contaminated Water Production in Old Oil Fields With Downhole Water separation: Effects of Capillary Pressures and Relative Permeability Hysteresis

2001 ◽  
Author(s):  
Solomon O. Inikori ◽  
Andrew K. Wojtanowicz
Keyword(s):  
Relative Permeability ◽  
Oil Fields ◽  
Contaminated Water ◽  
Water Production ◽  
Water Separation ◽  
Capillary Pressures

Elimination of Tight Emulsions

2021 ◽  
Author(s):  
Haakon Ellingsen ◽  
Hikmat Jaouhar ◽  
Andreas Hannisdal
Keyword(s):  
Crude Oil ◽  
Separation Efficiency ◽  
Operating Temperature ◽  
Oil Fields ◽  
Water Removal ◽  
Water Production ◽  
Test Results ◽  
Electrical Field ◽  
High Electrical Field ◽  
Performance Specifications

Abstract Maturing oil fields can pose a severe challenge for separation of oil and water. Increasing water production and tie in of new fields into existing infrastructure may result in separators struggling to meet performance specifications. Operational challenges are particularly experienced when the facilities are processing cold feedstock and tight emulsions. Typical solutions for overcoming separation challenges would be increasing operating temperature, injecting an increased quantity of demulsifier chemicals, or installing new larger separators. These alternatives may not be economically attractive or feasible for other reasons. The ability to successfully operate existing plants with tight and water-rich emulsions without incurring significant added operating expenditure is perceived as a major advantage. This paper will share the results from testing on a separator operating with Flotta Gold crude oil. The oil is known to produce particularly tight emulsions at low temperatures. The ePack technology has been tested to study its capability of separating water and crude oil from tight emulsions by means of electrical forces. The force generated by the high electrical field can break even tight emulsions, and the test results shown have proven the ability to go from very low separation efficiency without the ePack, to more than 90% water removal with the ePack turned on. Testing with residence times of up to 19 minutes without the ePack was not able to surpass the performance of a three minutes residence time with the ePack energized.

A photothermal and Fenton active MOF-based membrane for high-efficiency solar water evaporation and clean water production

2020 ◽  
Vol 8 (43) ◽  
pp. 22728-22735
Author(s):  
Xu Ma ◽  
Zheng Deng ◽  
Zhuoyi Li ◽  
Danke Chen ◽  
Xinyi Wan ◽  
...  
Keyword(s):  
High Efficiency ◽  
Water Evaporation ◽  
Contaminated Water ◽  
Clean Water ◽  
Evaporation Process ◽  
Water Production ◽  
Solar Water

A Fenton active Zr–Fc MOF-based membrane was designed for efficiently producing clean water from VOC contaminated water via the solar evaporation process.

scholarly journals Carbon Storage and Enhanced Oil Recovery in Pennsylvanian Morrow Formation Clastic Reservoirs: Controls on Oil–Brine and Oil–CO2 Relative Permeability from Diagenetic Heterogeneity and Evolving Wettability

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3663
Author(s):  
Lindsey Rasmussen ◽  
Tianguang Fan ◽  
Alex Rinehart ◽  
Andrew Luhmann ◽  
William Ampomah ◽  
...  
Keyword(s):  
Carbon Storage ◽  
Enhanced Oil Recovery ◽  
Relative Permeability ◽  
Oil Recovery ◽  
Flow Behavior ◽  
Flow Unit ◽  
Water Production ◽  
Intergranular Porosity ◽  
Diagenetic Processes ◽  
Pore Types

The efficiency of carbon utilization and storage within the Pennsylvanian Morrow B sandstone, Farnsworth Unit, Texas, is dependent on three-phase oil, brine, and CO2 flow behavior, as well as spatial distributions of reservoir properties and wettability. We show that end member two-phase flow properties, with binary pairs of oil–brine and oil–CO2, are directly dependent on heterogeneity derived from diagenetic processes, and evolve progressively with exposure to CO2 and changing wettability. Morrow B sandstone lithofacies exhibit a range of diagenetic processes, which produce variations in pore types and structures, quantified at the core plug scale using X-ray micro computed tomography imaging and optical petrography. Permeability and porosity relationships in the reservoir permit the classification of sedimentologic and diagenetic heterogeneity into five distinct hydraulic flow units, with characteristic pore types including: macroporosity with little to no clay filling intergranular pores; microporous authigenic clay-dominated regions in which intergranular porosity is filled with clay; and carbonate–cement dominated regions with little intergranular porosity. Steady-state oil–brine and oil–CO2 co-injection experiments using reservoir-extracted oil and brine show that differences in relative permeability persist between flow unit core plugs with near-constant porosity, attributable to contrasts in and the spatial arrangement of diagenetic pore types. Core plugs “aged” by exposure to reservoir oil over time exhibit wettability closer to suspected in situ reservoir conditions, compared to “cleaned” core plugs. Together with contact angle measurements, these results suggest that reservoir wettability is transient and modified quickly by oil recovery and carbon storage operations. Reservoir simulation results for enhanced oil recovery, using a five-spot pattern and water-alternating-with-gas injection history at Farnsworth, compare models for cumulative oil and water production using both a single relative permeability determined from history matching, and flow unit-dependent relative permeability determined from experiments herein. Both match cumulative oil production of the field to a satisfactory degree but underestimate historical cumulative water production. Differences in modeled versus observed water production are interpreted in terms of evolving wettability, which we argue is due to the increasing presence of fast paths (flow pathways with connected higher permeability) as the reservoir becomes increasingly water-wet. The control of such fast-paths is thus critical for efficient carbon storage and sweep efficiency for CO2-enhanced oil recovery in heterogeneous reservoirs.

scholarly journals A flexible biomimetic superhydrophobic and superoleophilic 3D macroporous polymer-based robust network for the efficient separation of oil-contaminated water

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5088-5097 ◽  
Author(s):  
Tawfik A. Saleh ◽  
Nadeem Baig ◽  
Fahd I. Alghunaimi ◽  
Norah W. Aljuryyed
Keyword(s):  
Contaminated Water ◽  
Water Separation ◽  
Efficient Separation ◽  
Robust Network

Superhydrophobic polyurethane for oil and water separation.

scholarly journals Effective Mechanisms to Relate Initial Rock Permeability to Outcome of Relative Permeability Modification

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4688 ◽  
Author(s):  
Faaiz Al-shajalee ◽  
Colin Wood ◽  
Quan Xie ◽  
Ali Saeedi
Keyword(s):  
Relative Permeability ◽  
Pore Radius ◽  
Water System ◽  
Water Production ◽  
High Permeability ◽  
Gas Reservoirs ◽  
Rock Permeability ◽  
Adsorbed Polymer ◽  
Permeability Modification ◽  
Initial Rock

Excessive water production is becoming common in many gas reservoirs. Polymers have been used as relative permeability modifiers (RPM) to selectively reduce water production with minimum effect on the hydrocarbon phase. This manuscript reports the results of an experimental study where we examined the effect of initial rock permeability on the outcome of an RPM treatment for a gas/water system. The results show that in high-permeability rocks, the treatment may have no significant effect on either the water and gas relative permeabilities. In a moderate-permeability case, the treatment was found to reduce water relative permeability significantly but improve gas relative permeability, while in low-permeability rocks, it resulted in greater reduction in gas relative permeability than that of water. This research reveals that, in an RPM treatment, more important than thickness of the adsorbed polymer layer ( e ) is the ratio of this thickness on rock pore radius ( e r ).

Research of Water Quality in Typical Low Permeability Oilfield Produced Water Treatment

2014 ◽  
Vol 556-562 ◽  
pp. 867-871
Author(s):  
Qiu Shi Zhao
Keyword(s):  
Water Quality ◽  
Oil Recovery ◽  
Treatment Process ◽  
Produced Water ◽  
Sewage Treatment ◽  
Oil Fields ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oilfield Produced Water ◽  
Oil Water

It is significative to study sewage treatment process in low permeable oil fields. It could enhance the oil recovery. The water quality characteristics and oil/water separation characteristics were researched during different period process by GC-MS. It shows that there are about 108 kinds of organic matters, including 45 kinds of aliphatic hydrocarbon, 7 kinds of aine, 5 kinds of sulfocompound and 9 kinds of hexacyclic compounds, such as Benzene, phenol, naphthalene and anthracene. The percent of oil droplets which size was less than 10μm is 57.3%, compared to 91.6% which size was more than 50μm. It is difficult to separate the water and oil. The remaining oil was emulsified oil. The process was hard to decrease COD, and some pollutants were existed in water, such as Arsenic, Selenium, Mercury ,Cadmium and Cr6+. It is further proposed to optimize and develop this process to removal oil and suspended solids.

Relative Permeability Modifier Fracturing Technique Inhibits Post-Fracturing Water Production: Case Histories From Egypt

2010 ◽  
Author(s):  
Mohamed Salem ◽  
Rami Yassine ◽  
Syed Arshad Waheed ◽  
Ezz El-Din Mohamed Abd. El-Aal ◽  
Mohamed Abd El-Monsef
Keyword(s):  
Relative Permeability ◽  
Water Production ◽  
Case Histories

Innovative Technique to Prevent Post-Fracturing Water Production using Relative Permeability Modifiers

2011 ◽  
Author(s):  
Ahmed Ali Mohamed Abdel Meguid ◽  
Mohamed Amr ◽  
Rami Yassine ◽  
Tamer Abdel Khalek ◽  
Ahmed Hamdy Awaad
Keyword(s):  
Relative Permeability ◽  
Water Production ◽  
Innovative Technique

scholarly journals ESTIMATION OF NEW RELATIVE PERMEABILITY CURVES DUE TO COMPACTION CASE STUDY AT BACHAQUERO FIELD – VENEZUELA

2011 ◽  
Vol 14 (2) ◽  
pp. 38-53
Author(s):  
Dung Quoc Ta ◽  
Peter Behrenbruch
Keyword(s):  
Relative Permeability ◽  
Water Production ◽  
Volume Changes ◽  
Mobile Water ◽  
Pore Structures ◽  
Immobile Water ◽  
Relative Permeability Curves

This paper is written to analyse the variation of water production due to compaction in a field in Venezuela. The producing water, after being analysed, was suspected not from aquifer. So where does the water come from? The results shows that pore structures of reservoir changed, and producing water is due to volume changes of immobile water and mobile water as the result of compaction. It means that relative permeability curves have changed when rock deforms.

scholarly journals MONITORING AND CONTROL OF NEW TECHNOLOGIES FOR ENHANCED OIL RECOVERY AT THE PRODUCTION FIELDS IN WESTERN KAZAKHSTAN

2021 ◽  
pp. 1-9
Author(s):  
Gulnaz Zh. Moldabayeva ◽  
Raikhan T. Suleimenova ◽  
Sairanbek M. Akhmetov ◽  
Zhanar B. Shayakhmetova ◽  
Gabit E. Suyungariyev
Keyword(s):  
Factor Analysis ◽  
Oil Recovery ◽  
Statistical Models ◽  
New Technologies ◽  
Oil Field ◽  
Oil Fields ◽  
Water Production ◽  
Western Kazakhstan ◽  
Wide Range ◽  
Technical Measures

This paper discusses topical problems of further effective development of depleted oil fields (DOF) to increase their final oil recovery on the example of the oil field in Western Kazakhstan. Further exploitation of fields using waterflooding becomes unprofitable. At the same time, on average at these facilities, at least 50% of the reserves will remain unrecovered. Most of the oil fields in the Republic of Kazakhstan are at the late and final stages of development, which is characterised by an increase in the share of hard-to-recover oil reserves, a decrease in annual oil withdrawals, and a high water cut of the produced oil. Therefore, the problems of improving the technology aimed at reducing the volume of associated water production and increasing oil recovery from partially flooded deposits is very urgent. With an increase in the well density, the degree of field drilling and aging of the well stock, the work with the current declining well stock remains a very topical issue. Improving the efficiency of diagnostics and the systematic selection of wells for repair and isolation works is an important element for rationalising field development in the current conditions of profit variance in the oil and gas industry. The methods of bottomhole zone treatment also implement a deflecting effect on filtration flows. Therefore, this method includes a wide range of geological and technical measures: down-spacing; water production restraining; conformance control of injectivity profiles; forced production; all types of mechanical, thermochemical and thermal technologies. Consider a number of geological and technical measures that perform the tasks of occupational safety rules. Geological and statistical models are proposed for diagnosing wells for a premature increase of water production using factor analysis calculations for base production and Hall plots. Results. The degree of temperature influence of the primary components of the compounds on the rheology, filtration characteristics, and stability of inverted emulsions was determined. The classification of oil loss factors was carried out based on the results of downhole analysis and oil production losses were determined. Geological and statistical models for well diagnostics for premature increase in water production were built using factor analysis calculations for base production and Hall plots.

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