... Abstract The cessation of CO 2 injection may be the result of poor reservoir response, low oil prices, or near the end of a CO 2 project. The focus of this paper is to describe the effect of CO 2 injection curtailment on oil recovery and production in a technically successful CO 2 flood...

... Abstract To date, field wide CO 2 flooding is continuous or WAG injection processes. In individual wells a huff’n’puff scheme has been used where CO 2 is injected into a well followed by a shut-in period; after a predetermined time, the well is produced. Each of these methods have practical...

... data from Hassi Messaoud field cases and it has given significant results. equation qdd fit oil reservoir spe 70036 flow rate fitting parameter production forecasting injection pressure transient analysis fetkovich application derivative type curve universal fitting equation...

... compared with less-costly corrosion solutions (such as internal plastic coatings (IPC) and thermoplastic materials like HDPE and PVC). Next, actual case history economic data is presented to qualify the use of Glass Reinforced Epoxy-lined tubular goods over IPC for corrosive seawater injection service...

.... Gel treatments should not be used to treat the most difficult problems—i.e., three-dimensional coning, cusping, or channeling through strata with crossflow. gelant upstream oil & gas waterflooding gel placement injection fracture production well pipe reservoir permeability leak...

... recovery and production rates and reducing costs were important factors. Treatments have been placed and analyzed for sweep improvement, CO 2 reduction, and water cycling-breakthroughs. enhanced recovery co 2 evaluation operation information injection profile application reservoir injection...

... Abstract Ras Budran field is a massive Nubian sandstone reservoir compartmentalized by major faults acting as partial barriers. Vertical communication is impeded by hydraulically sealing shale layers in the development of three main pressure regimes. A combined water injection and aquifer...

... injection was terminated in the mid-1990s. In 1994, however, miscible flooding was reinitiated in the reef margin area of the field using horizontal injectors and reduced well spacing. The reef margin is an area of thick, stacked pay that experienced high gravity override during the original miscible flood...

... and 82.5°C, the salinities are 88,540 mg/L, 55,028 mg/L, 14,9127mg/L and 195,000 mg/L, the room recovery improvement all exceed 19%. Now the four field tests get along favorably, verifying good result and indicating bright application prospect. high salinity formation injection combination system...

... by the network of natural and induced fractures. Most recovery operations at Lost Hills use induced fractures for better reservoir contact and waterflooding for pressure maintenance. Both production and injection wells are fractured in up to three intervals within the 300 m production interval. Oil recovery...

... Brine composition was the same as that used for the brine permeability measurements. The samples were prepared by flowing Blinebry separator oil through the system at control pressure and temperature. Between 100 and 150 cc of oil was injected through the sample over a 24-hour period to ensure...

... bwpd hydraulic fracturing orientation mapping result waterflooding san andre formation fracture treatment injection rate river well hgeu hgeu identification implication net pressure hydraulic fracture upstream oil & gas mapping fracture half-length tiltmeter mapping water...

... of induced fractures which can cause reduced sweep efficiency and fluid losses to other non pay zones. Results indicate that fracture systems are very stress sensitive in the Spraberry formation, with fractures opening and the effective permeability increasing at high injection rates (in addition, reservoir...

... Abstract The Denver Unit CO2 flood, one of the largest in the world, was implemented in 1984. CO2 injection was subsequently expanded in 1989 and again in 1991. By 1994, this 10 year old CO2 flood had a well-established decline in its production function. Through infill drilling and pattern...

... reservoirs can be poor because of premature water-breakthrough through high-permeability layers. It seems possible to improve the profitability of producing from heterogeneous reservoirs by diverting the injected water from preferentially flowing through high to low-permeability zones. The profitability...

... and a successful chemical program have greatly reduced the cost of these problems over the last 3 years. A new inhibitor for continuous capillary injection was recently developed and performed well on live oil lab tests. To evaluate the field performance of this new asphaltene inhibitor, a wellhead side stream...

... Abstract This paper reviews the effect of multiphase flow on mobility control in CO 2 flooding of oil reservoirs. It then presents experimental data on Sulimar Queen reservoir oil and CO 2 injection. Swelling tests for CO 2 and oil are perform in a visual PVT cell to identify saturation...

... Abstract Analysis of numerous injection/falloff tests in the field, primarily on coalbed methane wells, has led to a better understanding of the requirements for proper injection/falloff testing. Because most of the formations do not flow prior to testing, test design is difficult and many...

... Abstract Carbon dioxide injection in the Dollarhide Devonian reservoir commenced in May 1985. Subsequently, CO injection was expanded to an area of the majority southern fault block. As of May 1995, CO injection has been implemented in the entire Devonian formation in five phases. Hybrid CO...

... of a foam predictive ease are presented. The injection schedule of the foam predictive ease was specifically selected to mimic the filed injection schedule used in the foam pilot test at EVGSAU. The simulated results are consistent with the field pilot test results. Overall, the foam model is found...