Enhanced oil recovery bp north sea lessons learned 1. Selection and screening of polymers for enhanced oil recovery. Studies on a hybrid of foam and asp flooding further eor for. Polymer flooding new mexico institute of mining and. The united states has 300 billion barrels of oil that can be recovered through enhanced oil recovery technologies according to the department of energy. The efficiency of the process is in the range of 0. Enhancing polymer flooding performance 5 facts and figures about eor polymer. Synergistic mechanisms of asp flooding upstream pumping. Enhanced oil recovery eor process recovers oil not produced by primary or secondary recovery improves sweep efficiency in the reservoir by the injection of materials not normally present can reduce remaining oil saturation produce oil trapped by capillary forces residual oil. Incremental oil recovery as a result of polymer injection is approximately 12% ooip. Among nonthermal techniques is the gas flooding, where.
Potential for polymer flooding reservoirs with viscous oils abstract this report examines the potential of polymer flooding to recover viscous oils, especially in reservoirs that preclude the application of thermal methods. Enhancing polymer flooding performance 30 years of experience. The method shown requires a preflush to condition the reservoir, the injection of a polymer solution for mobility control to minimize channeling, and a driving fluid water to move the polymer solution and resulting oil bank to production wells. For existing eor polymers, viscosity increases roughly with the square of polymer concentrationa fact that aids the economics for polymer flooding of viscous oils.
Extend the application of polymer flooding to difficult reservoir conditions heavy oil, high salinity, high hardness, low permeability formations, high temperatures, etc. Eor methods based on polymer flooding, surfactant polymer flooding and alkalisurfactant polymer flooding are well established, but new challenges always. With growing global energy demand and depleting reserves, enhanced oil recovery eor from existing or brown fields is becoming increasingly important. The viscous nature of polymer solutions will necessarily reduce injectivity unless the well intersects a fracture. Mechanism study on foam flooding for daqing reservoirs after. The captain polymer eor pilot 31th annual iea eor symposium anette poulsen, chevron upstream europe, aberdeen, scotland october 2010. This paper provides an update on the status of polymer flooding technology, focusing more on field. Core flooding experiments monitored with ct proved that foam flooding could become a further eor method for daqing reservoirs after polymer flooding. Demonstrate that for new developments, eor scenarios should be considered early. Numerical approach for enhanced oil recovery with surfactant flooding author links open overlay panel sadegh keshtkar a morteza sabeti b amir h. An enhanced oil recovery technique using water viscosified with soluble polymers. Polymer improved oil recovery download ebook pdf, epub.
Enhancing polymer flooding performance 30 years of. Modeling polymer flooding, surfactant flooding and asp. Enhanced oil recovery eor is a collection of sophisticated methods, to extract the most oil from a reservoir. Spe 129899 potential for polymer flooding reservoirs with viscous oils 3 permeability dependence of resistance factors.
Enhanced oil recovery eor polymer flooding sinofloc. Introduction to enhanced oil recovery eor processes and bioremediation of oilcontaminated sites 48 alkalisurfactant flooding is a promising method for enhanced oil recovery. Target resource for eor applications is 6 trillion barrels, of the 9 trillion initially in place widespread application could far exceed the current forecasts chemical polymer flooding has large unrealized potential both hydrocarbon and co2 miscible flooding have large potential internationally a significant resource exists in the offshore, as. Polymer flooding is an eor method that uses polymer solutions to increase oil recovery by decreasing the wateroil mobility ratio by increasing the viscosity of the displacing water.
Enhanced oil recovery with asp flooding upstream pumping. Chemical eor low salinity options polymer flooding enhanced alkaline flooding foam enhancements surfactant flooding alkaline flooding usa multiple asp tests since 1960 discovery of the enhanced alkaline flooding process now know as asp pilots, pioneered by shell oil in 1980s polymer flood research 1980s successful pilot tests in oman. Enhanced oil recovery field case studies bridges the gap between theory and practice in a range of realworld eor settings. Hpam can be obtained either by post hydrolysis of acrylamide homopolymers or by copolymerization of acrylamide and sodium acrylate. Polymers for enhanced oil recovery technology sciencedirect. Fundamentals of carbon dioxideenhanced oil recovery eor. Physical properties of associative polymer solutions. The application of a new polymeric surfactant for chemical. Polymer flooding reduces costs related to water handling. In polymer flooding, the polymer is added to water to increase the viscosity of the water therefore decreasing the mobility of the water phase.
Grow industry capabilities that address principal barriers towards implementation of the eor strategy and associated delivery program. This method is similar to thermal eor, but uses a solar array to produce. Polymer flooding is used under certain reservoir conditions that lower the efficiency of a regular waterflood, such as fractures or high. Fractures can cause severe channeling andor injection out of zone for expensive eor fluids. Polymer enhanced oil recovery industry lessons learned 9 2. Enhanced oil recovery in high salinity high temperature. This school covers the basics of enhanced oil recovery processes, which aim at lowering the mobility of water polymer flooding andor at lowering the interfacial tension between the oleic and aqueous phases in the oil reservoirs surfactant, alkalisurfactant polymer. Polymer flooding is the most commonly applied chemical enhancedoilrecovery technique. A number of other low salinity water flood and chemical eor polymer and surfactant experimental and simulation studies have been completed which. Mobility ratio and eor potential depends on effective polymer viscosity for some polymers, the viscosity depends strongly on. A hybrid of foam and alkalisurfactant polymer asp flooding, as a candidate further eor technique integrating both properties of mobility control and oil displacement has been proposed for daqing reservoir after polymer flooding. Chemical flooding chemical flooding is divided into two different methods polymer flooding and surfactant polymer flooding. The focus of this chapter is on polymers and their use to enhance oil recovery through the process known as polymer flooding. Polymer flooding recovers mobile oil that has been bypassed during earlier waterflooding or aquifer intrusion due to reservoir heterogeneity.
This condition maximizes oilrecovery sweep efficiency, creating a smooth flood front without viscous fingering. Polymer flooding factors that may impact the eor potential lunchand learnseminar 27 january 2016. This course is an introduction to the fundamentals of enhanced oil recovery eor. An introduction to enhanced oil recovery techniques. Polymer flood eor potential for upper captain sand 0 20 40 60 80 2000 2005 2010 2015 2020 2025 n pd eor likely to extend captain field life ucs main ucs. Chemical methods of enhanced oil recovery surfactants to lower the interfacial tension between the oil and water or change the wettability of the rock. In traditional water flood systems, water is pumped through injector wells to push oil towards production wells. Polymer flooding is mainly to use polymer to increase the viscosity of injected water, reduce the ratio of oil to water flow, and increase sweep efficiency. Enhanced oil recovery eor modular injection systems can be tiedin to existing injection lines. Polymer flood 5 32% gel treatment 3 30% gel treatment w polymer flood 11 38%.
Poor conformance is a problem that plagues many operators of water and eor floods. Numerical approach for enhanced oil recovery with surfactant. Eor core flooding system v201405 a of these loads or stresses, some are caused by the weight of the material above the core, which is known as the overburdened pressure. Eor can be divided into two major types of techniques. Gloria kasimbazi page iii while for the distribution, heterogeneous is the suitable candidate for polymer flooding than homogeneous case. Reduced injectivity may be a greater concern for polymer flood application than the chemical cost of viscous polymer. Customizing polymer rheology for application in commercial scale polymer floods authors r. Surfactant polymer eor flooding involves the flow of fluids in a twophase aqueous and oleous, multicomponent water, salt, polymer, surfactant, and petroleum system. The properties of the polymer are determined by its average molecular weight, assuming that all the molecules are identical, which means the polydispersity index pdi is equal. Polymer flooding is the most commonly applied chemical enhanced oil recovery technique.
Chemical enhanced oil recovery eor is surely a topic of interest, as conventional oil resources become more scarce and the necessity of exploiting heavy and unconventional oils increases. Polymer flooding pdf the polymer flooding technology is the best choice to. Water quanity and quality requirements are estimated for individual eor processes steam drive,in situ combustion and carbon dioxide, micellar polymer. Modeling polymer flooding, surfactant flooding and asp schlumberger public surfactant flooding and asp alkaline, surfactant, and polymer flooding with eclipse charles a. Viscosity is increased until the mobility of the injectant is less than that of the oil phase in place, so the mobility ratio is less than unity. It is believed that polymer eor presents the greatest opportunity for mediumterm success in the ukcs and a number of heavy oil fields could have their recovery factor increased through polymer eor. Most oil remains in reservoir only 1536 of oil in place are produced by using eor methods more oil can be produced. Chuck kossack education university of michigan bs chemical schlumberger public engineering, bs math stanford. The daqing polymer flooding case has been extensively discussed previously in this chapter. Due to decreased water production and enhanced oil production, the total cost of using the polymer flooding technique is less than that of water flooding. Investigate polymer flooding for enhanced oil recovery in. Enhanced oil recovery in high salinity high temperature reservoir by chemical flooding. It does not recover the residual oil that is trapped in rock pores after. Loads in the rock will affect the cores permeability to fluids, so it is important to duplicate them during testing.
Historical and recent observations in polymer floods. Polymer enhanced oil recovery oil and gas authority. The united states will recover more than 300 billion barrels of oil through enhanced oil recovery eor technologies according to the department of energy. After this stage, fullfield deployment can be considered. Polymer coated nanoparticles for enhanced oil recovery. Polymer flooding is the evolution of conventional water flooding technique. Customizing polymer rheology for application in commercial. This study aims to analyze the influence of viscosity and interfacial tension ift on the recovery in heterogeneous reservoir and determines the main controlling factors of the polymer surfactant sp flooding. Enhanced oil recovery eor is being increasingly applied in the oil industry and several different technologies have emerged during, the last decades in order to optimize oil recovery after conventional recovery methods have been applied. It is relatively simple to apply and has a long history of successful field applications. Click download or read online button to get polymer improved oil recovery book now. Enhanced oil recovery expertise eor nalco champion. Polymer flooding has been used for more than 40 years to effectively recover the remaining oil from the reservoir, up to 30% of the original oil in place.
Our polymer gel conformance improvement solutions focus on correcting reservoir dominated features to increase sweep efficiency. Surfactant flooding is an eor technique in which the phase behavior inside the reservoir can be. Emphasis is given to practical information relevant to field applications of polymer flooding. Other successful polymer flooding projects in chinese oil fields such as the shengli and bohai bay have been described in the literature. Improving oil recoveryior with polymer flooding in a heavy. Miscible displacement methods, which include injection of hydrocarbon gas, co 2, or inert gas under. Potential for polymer flooding reservoirs with viscous oils. Main controlling factor of polymersurfactant flooding to. The most difficult parts of oil production are locating the deposit and drilling the wells. This article identifies a new method of enhanced oil recovery eor that relies on the injection of a chemical concoction consisting of alkalis, surfactants and polymers into the well to help the trapped oil rise to the surface.
Spe 129899 potential for polymer flooding reservoirs with. Foam demonstrated better pore blocking ability than polymer within middle and high permeability layers. A successful crosslinked polymer flooding has been implemented in jd reservoir, an ordinary heavy oil reservoir with high permeability zones. Glover,2 dongsheng wen,1 1school of chemical and process engineering, university of leeds, leeds, ls2 9jt, uk. With the combination of alkali and a small amount of su rfactant, oilwater ift can be reduced much more than with either alkali or surfactant alone.
Optimized polymer enhanced foam flooding for ordinary heavy. Chemicalenhancedoilrecovery whatisnew,whatworks,andwhereuseit. The total cost of polymer flooding is actually less than for water flooding due to decreased water production and increased oil production. Chemical eor processes encompass a variety of mechanisms, including a reduction in the oilwater interfacial tension,35 surface wettability alteration,610 the use of high viscosity agents for mobility control,1114 application of thermal methods. In addition, the polymer reduces the relative permeability of the water phase in porous media. Improving oil recoveryior with polymer flooding in a. Advantages and disadvantages of the different products are summarized here. Pdf chemical flooding has been found to be one of the major eor techniques especially for reservoirs where thermal methods are not feasible.
Areas covered include steam and polymer flooding, use of foam, in situ combustion, microorganisms, smart waterbased eor. Considering selective plugging feature, polymer enhanced foam pef flooding was taken as. Enhanced oil recovery water requirements springerlink. Objectives 3 eor industry task group terms of reference support oga in meeting the eor strategy and executing the eor delivery programme, speaking as a single voice for this particular subject area. Each technique has a specific use in a certain type of reservoirs. Polymer flooding polymer flooding is one of the most widely used eor methods to retrieve oil left. Polymer flooding investigation on the impact of voidage replacement ratio and other parameters on the performances of polymer flood in heavy oil based on field data authors.
For polymer flooding, since polymer resolution has the capability of enlarging water. Polymercoated nanoparticles for enhanced oil recovery. Field implementation requires specialized mixing and injection equipment to avoid polymer degradation and viscosity loss. Most of conventional enhanced oil recovery eor techniques could not achieve the desired effects.
Water requirements for enhanced oil recovery eor are thoroughly evaluated using publicly available information, data from actual field applications and information provided by knowledgeable eor technologists in fourteen major oil companies. Pope center for petroleum and geosystems engineering the university of texas at austin casper eor workshop october 26, 2007. Enhanced oil recovery using alkalinesurfactant polymer asp major. The mobility ratio m is defined as the ratio of displacing fluid mobility to displaced fluid mobility. This site is like a library, use search box in the widget to get ebook that you want. Enhanced oil recovery polymer flooding is the most widely used chemical enhanced oil recovery ceor method. Enhanced oil recovery eor polymer flooding polymer is a substance that greatly increases the viscosity of the liquid which mixed with this polymer and water. Nanoparticleassisted waterflooding in berea sandstones. Bp north sea eor lessons learned society of petroleum. Investigate polymer flooding for enhanced oil recovery in a mature oil field hisham khaled ben mahmud and voon yi hung department of petroleum engineering, curtin university malaysia. In an offshore reservoir, polymer eor is designed to improve the sweep of existing water flood systems.
1258 859 1419 1130 1172 974 508 767 1089 678 1089 536 915 1195 416 1424 979 425 247 863 1295 1320 1027 750 683 139 400 504 1056 1430 1275 1442 1429 603 1189 547 928 1231 695 899 59 299 1107 655