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Search concentration: Continuous AND fullbore spinner flowmeters
...e feasibility and The standard methods of injection profile gel strength requirements. logging are flowmeters, radioactive tracer - tracer loss and tracer velocity shot, and Fractures temperature surveys. Fra...ctures, both natural and induced, cause Flowmeters some of the most difficult thief zone problems. Treatment success can be The most commonly run ...flowmeters are the achieved in fractured formations, however full bore ...
... With either tool, fluid loss temperature survey can be useful in intervals are identified through continuous locating channeling behind casing. measurement of injected fluid velocity using a ...spinner blade or impeller. Since only a small percentage of the total flow Injection well logging program ...passes through the continuous flowmeter's impeller, the most meaningful data is The most accurate thief zone information is obta...
... a bulk volume or an adsorption calculation. In the injection well example shown as figure (4) the spinner log on the right Bulk volume calculations hand side indicates that 100% of the injected water ente...
Abstract In the past 5 years, chemical profile modification for water injection wells has evolved from the experimental stage to a routine procedure. Chemical profile modification can be used under a wide range of reservoir conditions to treat a variety of reservoir heterogeneities known as thief zones. This paper presents a discussion of the typical thief zone problems, how they are diagnosed and the design process necessary for a successful profile modification treatment. Introduction Chemical profile modification has been practiced since the mid - 1940's when the practiced since the mid - 1940's when the South Penn Oil Co. treated 159 water injection wells on the Bingham 533 lease in the Bradford field. This project resulted in the recovery of 285000 bbls of incremental oil and a 63% reduction in water oil ratio (WOR). Since then, nearly every conceivable chemical and solid product has been evaluated for permeability product has been evaluated for permeability reduction. Several techniques have emerged and are marketed under an array of trade, generic and process names. Typically these treatments are performed turnkey as a specialized operation provided by an oil field service company. Profile modification (PM) treatments must Profile modification (PM) treatments must be designed specifically for individual wells based on all available relevant data. Usually, one chemical system can be applied to an entire field, although some fields may require a combination of systems. Gel slug design for a given well is a function of many variables:thief zone type thief zone location with respect to shale barriers injection rates and pressures matrix permeability reservoir brine composition reservoir and bottom hole temperatures degree of permeability reduction required vertical profile prior to treatment In order to achieve the highest rate of success, all of these variables must be carefully analyzed and used in treatment design. Once a treatment is performed, its progress must be monitored to insure the progress must be monitored to insure the maximum benefit is realized. Figure 1 is a flowchart outlining the process used to design a PM treatment. THIEF ZONE CHARACTERISTICS Several types of thief zone problems that reduce vertical sweep efficiency are encountered in water injection wells. The severity and type of thief zone must be diagnosed in order to select the best treatment design for a given well.
- North America > United States > Texas > Kleberg County (0.24)
- North America > United States > Texas > Chambers County (0.24)
- North America > United States > Pennsylvania > McKean County (0.24)
Comprehensive Review of Fracture Control for Conformance Improvement in the Kuparuk River Unit - Alaska
Mishra, Ashok (Conoco Phillips) | Abbas, Sayeed (Conoco Phillips) | Braden, John (Conoco Phillips) | Hazen, Mike (Conoco Phillips) | Li, Gaoming (Conoco Phillips) | Peirce, John (Conoco Phillips) | Smith, David D. (Conoco Phillips) | Lantz, Michael (TIORCO, a Nalco Champion Company)
...ft. TVD to fill the well through the permafrost zone in the event of a sustained job shutdown. Long continuous pumping of gel treatments lasting weeks is not routine on Alaska's North Slope. Thus, it was import... a nipple profile of the L1 lateral, and a leak detect log was performed (pressure, temperature and spinner) while injecting into well I-1 to confirm no flow was entering the L1 lateral past the plug. This e...in a nipple above the L2 lateral to verify good mechanical integrity of the tubing before pumping a fullbore gel job. A passing pressure test to 2,500 psi was then attained on the tubing by casing annulus, an...
...uring installation but once fixed gave good reliable service. Use of Coriolis density and viscosity flowmeters was attempted, but the two sensor units tried were both bad. Ultimately it was observed that while ...Coriolis density and viscosity flowmeters may provide more accurate data, the reliability of the battery powered flow analyzer with companion...
Abstract This paper is a field case review of the process and methodologies used to identify, characterize, design, and execute a solution for a waterflood conformance problem in the Kuparuk River Unit in late 2013. In addition, post treatment analysis in a complex WAG flood will be discussed. The Kuparuk River Field is a highly fractured and faulted, multi-layer sandstone reservoir located on the North Slope of Alaska. Large scale water injection in the field was initiated in 1981 and overall the field responded favorably to waterflood operations. In 1996, Kuparuk implemented a miscible WAG flood in many areas of the field. However, natural fault and fracture connectivity has resulted in some significant conformance issues between high angle wells in the periphery. Methodologies employed to identify and characterize one specific conformance issue will be outlined. Details of diagnostic efforts, and how they were used to identify, characterize and mitigate an injector/producer interaction through a void space conduit will be discussed. The solution selected to resolve this conformance issue involved pumping a large crosslinked hydrolyzed polyacrylamide (HPAM) gel system. The solution used a tapered concentration design with one of the highest molecular weight HPAM polymers available. Before execution of this solution, extensive history matching and modeling of the solution design and benefits were used to justify this effort. These modeling efforts and their projections will be reviewed. This solution was pumped into the offending injector in late 2013, and offset producers were carefully monitored for gel breakthrough. The polymer treatment design parameters, including rates and pressure limits were used to generate an effective solution. A discussion of this active design approach, a complete review of the well problem dynamics, treatment operations, products used, and potential complications associated with these products will be discussed. Post solution execution performance analysis was difficult due to the active nature of this MWAG flood. A variety of plotting and analysis techniques were used to identify and quantify the results. A discussion of these results will be provided. Finally, a summary of lessons learned, and a limited discussion of future plans will be presented.
- North America > United States > Alaska > North Slope Borough (1.00)
- Europe > United Kingdom > Irish Sea > East Irish Sea > Liverpool Bay (0.24)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Sandstone (0.68)
- Geology > Structural Geology > Fault (0.66)
- North America > United States > Wyoming > Wertz Field (0.99)
- North America > United States > Texas > Permian Basin > SACROC Unit > Lower Clear Fork Formation (0.99)
- North America > United States > Texas > Permian Basin > SACROC Unit > Cisco Sand Formation (0.99)
- (6 more...)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Naturally-fractured reservoirs (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Faults and fracture characterization (1.00)
- Reservoir Description and Dynamics > Improved and Enhanced Recovery > Waterflooding (1.00)
- (3 more...)