ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
Despite all advantages of sick water fracturing such as low cost, high possibility of creating complex fracture networks, and ease of clean-up, large quantities of water are still left within the reservoir after flowback. Invasion of aqueous fracturing fluids can reduce the relative permeability to ...
Coiled Tubing or Pump Down Perforating have been the preferred solution for multi-stage ‘plug & Perf’ operations for years. However, when an operator in the Bakken formation was faced with a restricted inner diameter, they turned to an unconventional solution of using e-line, tractor-based conveyance. ...
Material Description This paper introduces a new class of materials, not previously known in oilfield applications, which can provide thermal, chemical and immiscible gas drive benefits in one package. Alkali metal silicides are solid, energy-dense chemicals that generate hydrogen, heat and an alkali ...
Currently inverse-emulsion polymers are the most popular friction reducers used in fresh water slickwater fracturing in shale reservoirs. Rather than paying to treat and dispose of produced and flowback water, operators would like to reuse it in subsequent stimulation treatments. Produced water, especially ...
Abstract The increasing demand for energy has extended the development horizon towards relatively tighter formations. However, experience has shown that the most successful technique to optimize production from these tight carbonate formations would require multistage acid fracture stimulation treatment. ...
Abstract Halite deposition is most commonly observed in gas/gas condensate fields with low water cut, high TDS produced brines and high temperature. Halite is notoriously difficult to inhibit and there are limited studies focused on halite due to it being incredibly challenging to have an effective ...
Abstract The injection of seawater into oil-bearing reservoirs in order to maintain reservoir pressure and improve secondary recovery is a well-established, mature operation. Moreover, the degree of risk posed by deposition of mineral scales (carbonate/sulphate) to the injection and production wells ...
Increasing demand and dwindling supply of crude oil have spurred efforts towards enhancing heavy oil recovery. Recently, applications of ionic liquids (ILs) for heavy oil recovery and catalytic upgrading have been reported. However, ILs are generally considered too expensive for industrial applications. ...
In-depth water diversion has been evaluated as a measure for increased oil recovery at the Snorre field, offshore Norway. The waterflood sweep efficiency can be potentially increased by in-depth placement of a blocking agent. In previous works (SPE-143836 and SPE-154004) in-depth formation plugging ...
Mature, high temperature, high salinity oil reservoirs pose significant challenges for chemical enhanced oil recovery (CEOR) and a simple robust solution is missing, yet highly desired, by asset holders. Viscoelastic surfactants are a class of amphiphilic molecules that can form supramolecular structures ...
India’s crude oil reserves tend to be light and sweet, with specific gravity varying from 38° API in the offshore Mumbai High field to 32° API at other onshore basins. India produced roughly 880 thousand barrels per day (bbl/d) of total oil in 2009 from over 3,600 operating oil wells. Enhanced oil recovery ...
Abstract Electrical resistivity measurement technique is being used to evaluate the remaining oil in place during carbon dioxide (CO2) – EOR and it is currently extended to CO2 sequestration projects for tracking and quantifying carbon dioxide migration. Seismic method is another technique but it becomes ...
Abstract Millimeter-sized (10 µm~mm) particle gels have been used widely to control water flow through super-high-permeability zones and fracture zones in mature oil fields. During particle gel extrusion into target zones, the gel can form a cake on the surface of low-permeability, unswept formations. ...
Workflow and the results of the work packages of a Microbial Enhanced Oil Recovery (MEOR) project aimed at a pilot are introduced and discussed. An enrichment culture consisting of various strains derived from one of the screened Wintershall fields showed good growth and EOR characteristics under feeding ...
Injection of water with designed chemistry has been proposed as a novel enhanced-oil recovery (EOR) method and is referred to as low salinity and smart waterflooding, among other names. The plethora of names encompasses a family of EOR methods relying on modifying water chemistry to increase oil recovery. ...
Low salinity waterflooding is gaining some attention in the recent literature as a means of improving oil recoveries. However, a clear understanding of the key mechanism(s) of low-salinity waterflooding does not seem to have emerged although wettability alteration is repeatedly cited as the cause for ...
Water soluble anionic polymers are widely used as Mobility Control agents in EOR. However, their shear, salt, free radical and thermal stability limit their domain of application. A joint industrial effort has led to new optimized polymer compositions. The chemical structure has been designed to improve ...
Injection water with selective ionic content and composition is an essential requirement for the success of SmartWater Flooding application in carbonate reservoirs. Lower salinity SmartWater depleted in monovalent ions, but enriched in sulfates and divalent cations is desired for optimum incremental ...
Water chemistry with selective ionic content and composition in the injection water plays a critical role to impact on several oil recovery enhancement processes. Lower ionic strength waters with threshold salinities less than 5,000 ppm are desired for SmartWater flooding in sandstones. Low salinity ...
For the first time ever a novel biopolymer is being field tested in a mature onshore oil field in Northern Germany. This biopolymer - named Schizophyllan after its producing fungus - shows excellent viscosifying efficiency and high tolerance towards harsh reservoir conditions such as high temperature, ...