Sagd water treatment pdf

Steamassisted gravity drainage sagd is a thermal in situ heavy oil recovery process that was originally developed by butler 1991. Filmtec reverse osmosis membranes technical manual. Treatment for sagd oil production pretreatment for ro. Primary treatment consists of three phase separator followed by a skimming tank. Process integration applied to thermal insitu oil sands. Dave brown, encana facilities integrity coordinator basil elborno, bsc chem. The procedure utilizes a pair of parallel horizontal wells, one at the bottom of the formation. Treatment of produced water has been attempted and is proven to be an effective option for produced water handling. Hls is used for the water treatment and the feed to the otsg is a single stream.

Most common water treatment strategies as well as look at. The test separator will be equipped with an inline water cut analyzer and. Produced water, sagd may 16, 2017 safety data sheet page 1 of 6 1. Water treatment plant wtp processes that are commonly used in getting clean potable water to your household. Water treatment for sagd oil production pretreatment for ro. Treating sagd blowdown with the saltmaker evaporator crystallizer. Sagd is an enhanced oil recovery technology for producing heavy crude oil and bitumen. Evaluating energy and water saving opportunities in sagd. An oil sands producer in northern alberta, developing a new central process facility, required that the water treatment system use water efficiently to meet operational and. After successfully completing phase 1 work on dissolved silica removal, the client agreed to continue phase 2 work with organocat.

The resulting carbonates drop out of solution and form a sludge at the clari. Treating oilfield water can help facilitate additional water management options. An oil sands producer in northern alberta, developing a new central process facility. Water treatment and steam generation are critical to in situ oil production. Scale inhibitors and biocides allow for those systems to remain free flowing and delivering the best possible results to any system. Next generation sagd produced water treatment technology. Keeping a healthy, free flowing water system and steam generator are at the heart of the operations. A comparison1 of field gate costs from the february 2017 update with this years supply costs indicates that, after adjusting for inflation, the supply cost for a greenfield sagd producer has. Sagd oil sands online is offered through keyanos continuing education program in 4 parts well pads, bitumen processing, produced water deoiling, and water treatment. Being able to maximize use of water is key in sagd operations. Pdf treatment of an in situ oil sands produced water by polymeric.

An oil sands producer in northern alberta, developing a new central process facility, required that the water treatment system use water efficiently to meet operational and sustainability objectives. The epa first published a water treatment manual on disinfection in 1998. In 2011, organocat was contracted by one of the worlds largest oil companies to work on a project to remove dissolved silica from sagd process and blowdown water. Lime softening lime softening is an operation which has been used for the past 150 years to remove hardness and soften the water. Since the publication of this manual there have been significant developments both in terms of the technology and understanding of the disinfection of drinking water and in the supervisory role of the epa in the drinking water area. Grizzly may river sagd project section 4 december 20 42 process description grizzly oil sands ulc 4. The sagd or steam assisted gravity drainage process has become a popular oil production method in alberta. Other water treatment steps, such as ion exchange, filtering, deaeration, and the like remain the same. Coagulant blend in sagd water treatment conocophillips.

The treated water gets further processed by reverse osmosis thus ensuring steam generation. Application note sagd water treatment ph and o 2 2 added. Treatment of the recycled water consumes energy and generates waste. Interesting tradeoffs have been identified between cost, energy and water which can help oil sands operators make informed decisions about investments in which water treatment technologies for sagd operations. Harmful chemicals from human activities industrial wastes, pesticides, fertilizers. Pathogens diseasecausing organisms that include bacteria, amoebas and viruses, as well as the eggs and larvae of parasitic worms. After oil is produced, the treatment process begins with electrostatic dehydration, high efficiency gravity separation, and floatation. It is an advanced form of steam stimulation in which a pair of horizontal wells is drilled into the oil reservoir, one a few metres above the other. A method and system for treating a water stream which contains fouling organics, where the water stream is recovered from an underground hydrocarboncontaining formation during sagd oil recovery operations conducted on said formation. Sagd water treatment new technology to reduce otsg fouling and improve efficiency 2014 4800 strawberry lane louisville, ky 40209 phone.

Studies conducted to identify, verify and compile existing and newly developed techniques demonstrate the economical benefits of produced water treatment. Treatment of sagd produced waters without lime softening. Sagd water treatment trains typically comprise of 3 stages, primary, secondary. Scale inhibitors or antiscalants as are generally organic compounds containing sulphonate, phosphonate, or carboxylic acid functional groups and chelating agents such as carbon, alum, and zeolites that sequester and neutralise a particular ion which may be formed. Water consumption in this method of enhanced oil recovery eor can be quite high. A hls or wls reduces the silica and in certain cases the th concentrations. Identification product identifier produced water, sagd chemical description deoiled water with trace amounts of salt and metal. Rajindar singh, in hybrid membrane systems for water purification, 2005. As a result the sites are required to recycle produced water from the wells through water treatment facilities. Treating sagd blowdown with the saltmaker evaporator. Twostage robust optimization of water treatment network.

Sagd water treatment pdf sagd is extremely water intensive thus proper treatment is essential to eliminate corrosion and. No well integrity issues encountered during restart of sagd wells detailed well startup plan that was utilized focused on a controlled rate of temperature increase in the build section and on preventing condensation induced water hammer in the lateral significant amount of stored heat in steam chambers prior to plant suspension. Sagd is extremely water intensive thus proper treatment is essential to eliminate corrosion and. No issues with water treatment process 1f1152507618w4 grosmont member d wsw. Oil and gas produced water treatment saltworks technologies. Sagd steam assisted gravity drainage is an enhanced.

This article will discuss lime softening through a new perspective, instead of going through the detailed chemical equations. A disposal formation was over pressurizing and impacting operational performance for sagd operating facilities by limiting disposal volume. Shows two typical high level sagd water treatment processes. Steam assisted gravity drainage sagd ide technologies.

The method comprises injecting an oxidizing agent, preferably air, into the water stream when first recovered from the underground formation, and using a porous. Water treatment for sagd oil production pretreatment for. Once completed, it is accepted as 37 credit hours toward the college diploma. An oil sands producer in northern alberta, developing a new central process facility, required that the water treatment system use water. Modification to the base case for water treatment in a sagd typical central process facility the base case analyzed corresponds to a typical cpf for sagd.

Treatment of an in situ oil sands produced water by polymeric membranes article pdf available in desalination and water treatment 5732. Successfully identified four water treatment system modifications and four operational modifications that. Sagd water treatment oil water filter filtrasystems. Challenges in water treatment for generation of 100% steam. Civil engineers design, monitor and maintain water treatment plants and water supplies. Silica is removed by a complex absorption reaction with the mgoh 2. It is transported through pipes to injection wells which pump the steam into the oil sands. Leveraging our expertise and 50 years of experience in thermal solutions and 25 years in produced water treatment, ide is able to address the sagd industrys specific needs with robust, reliable and costeffective horizontal evaporators that are suitable for remote locations and resilient to challenging chemical water compositions. The afterfilters remove the sludge carryover from the lime softeningprocess. Treatment of sagd water using low coagulant dose and. Sagd is extremely water intensive thus proper treatment is essential to eliminate corrosion and scale buildup.

Enhanced recovery sagd steam assisted gravity drainage is an enhanced oil recovery eor process common in oil sands deposits such as those found in central canada. Steamassisted gravity drainage sagd process water contains high concentrations of dissolved organic and inorganic matter. The resulting water used in both the water and steam systems is never. Leverage our advanced technology, process engineering expertise, and experience treating produced waters from shale, enhanced oil recovery, and oil sands to help you reduce operating costs and meet production targets. The system supplied would need to maximize reuse of the treated produced water and minimize waste generated while providing quality water to the.

The animation takes the student underground, to where the actual sagd process occurs. Oil and gas 100 micron selfcleaning prefiltration module fully automated sic crossflow membrane system with integrated backwash and cip modules 10 pcs. Civil engineers are vital in the treatment and delivery of water to. Steamassisted gravity drainage sagd is a drilling technique that is used to extract heavy oil that is too. The traditional produced water treatment plant installed to obtain the abovewater quality for a sagd facility is shown in figure 1. Pdf treatment of an in situ oil sands produced water by. High pressure steam is continuously injected into the upper wellbore to heat the oil and reduce its viscosity, causing. Butler proposed to use steam injection, coupled with horizontal well technology, to assist the movement of oil to a production well by means of gravitational forces.

It reacts with water to form magnesium hydroxide mgoh 2. The study provides valuable insights regarding the suitability of membranes as alternatives to conventional sagd water treatment methods. As a result, operators are looking for onsite blowdown water treatment solutions to remove freshwater from the blowdown for reuse, and condense all waste to solids for safe and lower cost disposal in certified landfills. Natural gas consumption may vary in more than 15% depending on the selected scheme. This work aims to obtain i a robust process design and ii robust operational policies for the water treatment network, which are easily applicable for any realization of uncertainty that the problem has been modeled to. Wo2015184521a1 sagd water treatment system and method. Characterization and comparison of dissolved organic. This paper presents a study of twostage adaptive nonlinear robust optimization in dealing with uncertainty in the optimal design and operation of water treatment systems. Investigation of water treatment and steam generation. Emerging waterwastewater treatment technologies for the oil sands. Steam assisted gravity drainage sagd blowdown water from three operating sites. In more detail, the polyamine coagulant is a relatively low molecular weight, cationic polymer with a high charge density. Toc and 2 ppm silica in the feed water to a drum boiler, and below 600 ppm toc and 50 ppm silica in the feed water to a otsg. A wide range of analytical techniques including electrospray ionization mass spectrometry, gas chromatographymass spectrometry, fourier transform infrared spectrometry, and fluorescence spectrophotometry have been utilized for the identification and measurement of.