Migration of Clay in Flows of Oil-Water Mixtures Through Sand Filters

2001 ◽  
Author(s):  
H. R. Patel ◽  
G. G. Chase
Keyword(s):  
Surface Area ◽  
Aqueous Phase ◽  
Oil Recovery ◽  
Produced Water ◽  
Petroleum Industry ◽  
Phase Flow ◽  
Sand Filters ◽  
Sand Filter ◽  
Clay Particles ◽  
Secondary Oil Recovery

Abstract One of the most crucial problems that the petroleum industry has been facing for quite some time, is the damage done to the sandstone formations by the produced water that is pumped into the ground during secondary oil recovery. The drastic reduction in permeability of these sandstone beds due to the water-shock, is a great concern in petroleum industry. The changes in produced water composition has made secondary oil recovery difficult. The decreasing permeability of the bed, increases the pumping and equipment cost to a great extent. The control of clay release is essential to the economic and effective operations in many oil fields. The main topic of this research is the effect of electrolytic composition in produced water on the clay particles pumped into sandstone formations or through sand-filters. Earlier studies [1–5] have revealed that high pH and low salt concentrations of water lead to release of clay from sand-grains. Also, there might be some clay particles injected into the ground with the produced water. These injected clays get captured by the sandstone bed. Both the release and capture of clays changes the porosity of bed and the surface area of sandstone particles and thus, reduces the permeability of the bed drastically. This paper just presents the experimental work done to predict the release of indigenous clay in the sand filter in aqueous phase flow. Future work will concentrate more on actual filtration experiments to release of indigenous clays and capture of injected clays in aqueous phase flow and the release-capture phenomena in two phase flows as well. In produced water operations, oil companies need to remove particles from the injection water to avoid formation damage. Consolidated Sand Cartridge filters are an inexpensive alternative compared to tradition means of filtering the particles. This work demonstrates the capability and advantages of these filters. The filter has properties similar to that of sandstone and so, results of clay migration study for the filter may be similar to sandstone bed as well. The Consolidated Sand filter is superior compared to conventional cylindrical sand filters in that its outer surface is expanded out into a six-lobe geometry with a larger surface area for filtration. Hence higher flow rates are achieved through the filter at a given pressure drop and the life of filter increases. Also, it has a glue bound sand structure which reduces the release of clay compared to the conventional sand filters. However, the disadvantage of the filter is that it is bulky and heavy and it adds to the disposal cost for the user. This work serves the dual purpose of characterizing the consolidated sand cartridge filter and also, studying the phenomena of clay release and capture in the sand filter to determine the optimum combination of pH and salt-concentration for minimal permeability loss. The phenomenon of clay release and capture is explained on basis of zeta potential of the particles, which characterize the surface charge of the particles.

scholarly journals Separation of oil-in-water emulsion using slotted pore membrane

2018 ◽  
Vol 11 (1) ◽  
pp. 57
Author(s):  
P.D. Sutrisna ◽  
F.S. Lingganingrum ◽  
I.G. Wenten
Keyword(s):  
Pore Size ◽  
Oil Recovery ◽  
High Stability ◽  
Produced Water ◽  
Petroleum Industry ◽  
Water Emulsion ◽  
Oil In Water ◽  
High Concentrations ◽  
Oil In Water Emulsion ◽  
Oil Filtration

Nowadays, oil-in-water (O/W) emulsion has become an important topic in many industries. Petroleum industry is one of these industries. O/W emulsion produced in crude oil recovery causes problems at different stages in petroleum industry. Produced water can not be injected again into the well, because it contains high concentrations of oil, grease and suspended particles. Recently, membrane technology has been applied in separation of O/W emulsion. One membrane that has been developed special for oil filtration is slotted true surface filter. This research investigated influences of pore size and initial concentration of feed emulsion during oil filtration using slotted pore membrane. From the experiment, oil rejection will be higher if we use membrane with smaller pore size, emulsion with high stability and small trans membrane pressure. Based on the slot width it can be concluded that 33 microns membrane gives better oil rejection than 80 microns membrane. Initial concentrations of challenge emulsion also influence value of flux and oil rejection, which will also influence our decision to choose suitable membrane in relation with hydrophilicity of the membrane. During microfiltration process, there was deformation of oil particle through slot of membrane, which can be analyzed by observing size of oil drops in feed and permeate sides. Keywords: emulsion, microfiltration, slotted pore membraneAbstrakSaat ini penanganan limbah emulsi minyak dalam air menjadi topik penting di berbagai industri. Salah satunya adalah industri perminyakan. Emulsi yang dihasilkan dalam proses penambangan minyak mentah menimbulkan masalah pada beberapa tahapan proses di industri. Air yang mengandung minyak tidak dapat digunakan kembali untuk meningkatkan perolehan minyak karena mengandung minyak, lemak dan partikel tersuspensi dalam konsentrasi tinggi. Sehingga dibutuhkan proses pemisahan emulsi minyak dalam air. Akhir–akhir ini teknologi membran telah digunakan untuk memisahkan emulsi tersebut. Salah satu membrane yang dikembangkan adalah membrane berslot seperti yang digunakan dalam penelitian ini. Penelitian ini telah berupaya mengamati pengaruh variasi ukuran pori dan konsentrasi umpan terhadap performa membrane berslot dalam memisahkan emulsi minyak dalam air. Dari percobaan, diperoleh hasil bahwa rejeksi membran terhadap minyak meningkat jika digunakan membrane dengan ukuran ori lebih kecil, emulsi dengan kestabilan yang tinggi, dan beda tekanan yang kecil. Disimpulkan bahwa membrane dengan ukuran pori 33 mikrometer memberikan rejeksi membrane lebih tinggi dibandingkan membrane dengan ukuran pori 80 mikrometer. Konsentrasi awal umpan mempengaruhi fluks dan rejeksi serta mempengaruhi pilihan kita dalam memilih jenis membran yang digunakan. Selama proses filtrasi, terjadi perubahan bentuk atau deformasi partikel minyak melewati slot atau pori membrane yang diamati melalui distribusi ukuran partikel.Kata kunci: emulsi, mikrofiltrasi, membran berslot

Electrochemical removal of sulfate from petroleum produced water

2015 ◽  
Vol 72 (2) ◽  
pp. 284-292 ◽  
Author(s):  
Pratiksha Jain ◽  
Mohita Sharma ◽  
Manoj Kumar ◽  
Prem Dureja ◽  
M. P. Singh ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Produced Water ◽  
Anaerobic Fermentation ◽  
Petroleum Industry ◽  
Integrated Approach ◽  
Oil Field ◽  
Synthetic Wastewater ◽  
Second Step ◽  
Sulfate Removal ◽  
Electrochemical Removal

Petroleum produced water (PPW) is a waste-stream that entails huge cost on the petroleum industry. Along with other suspended and dissolved solids, it contains sulfate, which is a major hurdle for its alternative use intended toward enhanced oil recovery. This study proposes a two-step process for sulfate removal from PPW. A synthetic PPW was designed for the study using response surface methodology. During the first step, sulfate present in PPW was reduced to sulfide by anaerobic fermentation with 80% efficiency. In the second step, more than 70% of the accumulated sulfide was electrochemically oxidized. This integrated approach successfully removed sulfate from the synthetic wastewater indicating its applicability in the treatment of PPW and its subsequent applications in other oil field operations.

scholarly journals Application of Nanoparticles for Oil Recovery

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1063
Author(s):  
Ole Torsæter
Keyword(s):  
Surface Area ◽  
Oil Recovery ◽  
Chemical Reactivity ◽  
Petroleum Industry ◽  
Volume Ratio ◽  
Large Surface Area

Due to their large surface-area-to-volume ratio and enhanced chemical reactivity, nanoparticles have attracted interest among researchers in the upstream petroleum industry for oil recovery applications [...]

Reuse of Produced Water Grows in the Oil and Gas Industry

2020 ◽  
Vol 72 (12) ◽  
pp. 60-61
Author(s):  
Judy Feder
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil And Gas ◽  
Produced Water ◽  
Petroleum Industry ◽  
Oil And Gas Industry ◽  
Environmental Conservation ◽  
Gas Industry ◽  
External Stakeholders ◽  
Oil And Gas Operations

This article, written by JPT Technology Editor Judy Feder, contains highlights of paper SPE 199498, “Reuse of Produced Water in the Oil and Gas Industry,” by Madeleine Gray, International Petroleum Industry Environmental Conservation Association, prepared for the 2020 SPE International Conference and Exhibition on Health, Safety, Environment, and Sustainability, originally scheduled to be held in Bogota, Colombia, 28-30 July. The paper has not been peer reviewed. The onshore oil and gas industry investigates new and improved ways to manage the supply and disposal of produced water continually. Within oil and gas operations, produced water increasingly is being recycled and reused for enhanced oil recovery, drilling, and well stimulation. The growing global demand for water resources also is creating interest in reusing produced water outside oil and gas operations. The complete paper focuses on sources of produced water from conventional and unconventional onshore oil and gas operations and addresses the challenges and opportunities associated with reusing the produced water. Introduction Produced water is water that is brought to surface during oil and natural-gas production. It includes formation, flowback, and condensation water. Produced water varies in composition and volume from one formation to another and is often managed as a waste material requiring disposal. In recent years, increased demand for, and regional variability of, available water resources, along with sustainable water-supply planning, have driven interest in reusing produced water with or without treatment to meet requirements within the industry or by external users. Reuse of produced water can provide important economic, social, and environmental benefits, particularly in water-scarce regions. It can be used for hydraulic fracturing, waterflooding, and enhanced oil recovery, decreasing the demand for other sources of water. However, reuse for offsite, non-oilfield applications such as crop irrigation, wildlife and livestock consumption, industrial processes, and power generation, is subject to a variety of constraints and risks. Practical considerations for offsite reuse include supply and demand and regulatory, infrastructural, economic, legal, social, and environmental factors. Sources, Chemical Properties, and Management of Produced Water The information contained in the paper is based on an internal survey conducted by the International Petroleum Industry Environmental Conservation Association (IPIECA) of 14 of its member companies, interviews with selected external stakeholders covering a range of sectors and geographic regions, and a literature review of readily available information. The external stakeholders were identified from the membership survey as well as from IPIECA and consultant experience. Sources and Volumes. Onshore oil and gas operations generate millions of barrels of produced water each day world-wide. The composition and flow of produced water can differ dramatically from one source to another.

A Numerical Investigation of Low Salinity Polymer Flooding Effects from a Geochemical Perspective

2021 ◽  
Author(s):  
Omar Chaabi ◽  
Emad W. Al-Shalabi ◽  
Waleed Alameri
Keyword(s):  
Aqueous Phase ◽  
Oil Recovery ◽  
Reactive Transport ◽  
History Matching ◽  
Solution Chemistry ◽  
Related Effect ◽  
Exchange Reactions ◽  
Two Phase ◽  
Low Salinity ◽  
Geochemical Reactions

Abstract Low salinity polymer (LSP) flooding is getting more attention due to its potential of enhancing both displacement and sweep efficiencies. Modeling LSP flooding is challenging due to the complicated physical processes and the sensitivity of polymers to brine salinity. In this study, a coupled numerical model has been implemented to allow investigating the polymer-brine-rock geochemical interactions associated with LSP flooding along with the flow dynamics. MRST was coupled with the geochemical software IPhreeqc. The effects of polymer were captured by considering Todd-Longstaff mixing model, inaccessible pore volume, permeability reduction, polymer adsorption as well as salinity and shear rate effects on polymer viscosity. Regarding geochemistry, the presence of polymer in the aqueous phase was considered by adding a new solution specie and related chemical reactions to PHREEQC database files. Thus, allowing for modeling the geochemical interactions related to the presence of polymer. Coupling the two simulators was successfully performed, verified, and validated through several case studies. The coupled MRST-IPhreeqc simulator allows for modeling a wide variety of geochemical reactions including aqueous, mineral precipitation/dissolution, and ion exchange reactions. Capturing these reactions allows for real time tracking of the aqueous phase salinity and its effect on polymer rheological properties. The coupled simulator was verified against PHREEQC for a realistic reactive transport scenario. Furthermore, the coupled simulator was validated through history matching a single-phase LSP coreflood from the literature. This paper provides an insight into the geochemical interactions between partially hydrolyzed polyacrylamide (HPAM) and aqueous solution chemistry (salinity and hardness), and their related effect on polymer viscosity. This work is also considered as a base for future two-phase polymer solution and oil interactions, and their related effect on oil recovery.

scholarly journals Characterisation of Olive Mill Effluents and Treatments Essays by Sand Filters Followed by Macrophytes Systems

2017 ◽  
pp. 257-266
Author(s):  
Laila Mandi ◽  
Mounia Achak ◽  
Naaila Ouazzani
Keyword(s):  
Organic Matter ◽  
Phenolic Compounds ◽  
Aquatic Plants ◽  
Typha Latifolia ◽  
Domestic Wastewater ◽  
Sand Filters ◽  
Sand Filter ◽  
Efficient Treatment ◽  
Industrial Oil ◽  
Olive Mill

Industrial oil olives have a fundamental economic importance for many countries around the Mediterranean Sea. However, during oil olive production, large amount of polluted waters known as olive mill wastewaters (OMW) are generated. Many studies have been undertaken to find efficient treatment systems and several techniques have been tested, but there have been few studies investigating sand filter or macrophytic plants for this type of effluent. The objective of this work is to study of the suitability of macrophytic plants to treat olive mill wastewater (OMW) after their passage through sand filter. The experimental pilot consists of a sand filter followed by a planted system. The sand filter is filled with 50 cm of sand and 10 cm of gravel in the top and the bottom of the filter. The alimentation (4 cm/j) is done sequentially following one day wet /three days dry cycle. In order to activate the degradation processes in the sand filter, OMW are diluted at 50% by domestic wastewater. The second step of the treatment consists of a tank (1x1x1 m3) filled with 20 cm of gravel and 60 cm of soil planted with a mixture of aquatic plants (Phragmites australis, Typha latifolia and Arundo donax) at a density of 25 young plants/m2 and irrigated two times in the week by 20L of preliminary filtered OMW. The obtained results show that the sand filter ensures a neutralization of the OMW pH which passes from 4.79 to 7.68. The enrichment of sand by the micro-organisms makes it possible to have an important mineralization of the organic matter. After ten weeks of operation of this system without clogging sign, the rate of abatement of the TSS, total COD, dissolved COD and phenolic compounds is about 70%, 79%, 76% and 81% respectively. The preliminary outputs by the planted system show a good adaptation of the tested plants to the preliminary treated OMW. The pilot allows an elimination of 94% of TSS, 99.7% of total COD, 99.5% of dissolved COD and 95% of phenolic compounds. With regard to OMW treatment efficiency, the results obtained agree with important role of macrophytes for maintaining the aquatic plants treatment capability particularly for wastewater with high organic matter.

scholarly journals Integrated Halo Model And Hydrodynamic Simulation For Optimization Oil Production In Crystalline Fractured Reservoirs

2021 ◽  
Author(s):  
Hung Vo Thanh ◽  
Kang-Kun Lee
Keyword(s):  
Oil Recovery ◽  
History Matching ◽  
Fractured Reservoirs ◽  
Petroleum Industry ◽  
Oil Production ◽  
Modelling And Simulation ◽  
Development Plan ◽  
Sweep Efficiency ◽  
Field Development ◽  
The World

Abstract Basement formation is known as the unique reservoir in the world. The fractured basement reservoir was contributed a large amount of oil and gas for Vietnam petroleum industry. However, the geological modelling and optimization of oil production is still a challenge for fractured basement reservoirs. Thus, this study aims to introduce the efficient workflow construction reservoir models for proposing the field development plan in a fractured crystalline reservoir. First, the Halo method was adapted for building the petrophysical model. Then, Drill stem history matching is conducted for adjusting the simulation results and pressure measurement. Next, the history-matched models are used to conduct the simulation scenarios to predict future reservoir performance. The possible potential design has four producers and three injectors in the fracture reservoir system. The field prediction results indicate that this scenario increases approximately 8 % oil recovery factor compared to the natural depletion production. This finding suggests that a suitable field development plan is necessary to improve sweep efficiency in the fractured oil formation. The critical contribution of this research is the proposed modelling and simulation with less data for the field development plan in fractured crystalline reservoir. This research's modelling and simulation findings provide a new solution for optimizing oil production that can be applied in Vietnam and other reservoirs in the world.

scholarly journals Polymer gels for controlling water thief zones in injection wells

2012 ◽  
Vol 5 (1) ◽  
pp. 37-44 ◽  
Author(s):  
Gustavo-Adolfo Maya-Toro ◽  
Rubén-Hernán Castro-García ◽  
Zarith del Pilar Pachón-Contreras. ◽  
Jose-Francisco Zapata-Arango
Keyword(s):  
Oil Recovery ◽  
Water Injection ◽  
Injection Wells ◽  
Recovery Processes ◽  
Injection Water ◽  
Secondary Oil Recovery ◽  
High Concentrations ◽  
Low Efficiency ◽  
Hydrolyzed Polyacrylamide ◽  
Positive Results

Oil recovery by water injection is the most extended technology in the world for additional recovery, however, formation heterogeneity can turn it into highly inefficient and expensive by channeling injected water. This work presents a chemical option that allows controlling the channeling of important amounts of injection water in specific layers, or portions of layers, which is the main explanation for low efficiency in many secondary oil recovery processes. The core of the stages presented here is using partially hydrolyzed polyacrylamide (HPAM) cross linked with a metallic ion (Cr+3), which, at high concentrations in the injection water (5000 – 20000 ppm), generates a rigid gel in the reservoir that forces the injected water to enter into the formation through upswept zones. The use of the stages presented here is a process that involves from experimental evaluation for the specific reservoir to the field monitoring, and going through a strict control during the well intervention, being this last step an innovation for this kind of treatments. This paper presents field cases that show positive results, besides the details of design, application and monitoring.

Sign in / Sign up

Export Citation Format

Share Document