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- W2070302001 abstract "Abstract Horizontal wells often present a substantial challenge in reservoir simulation. In a recent field review, we experienced difficulties modeling long horizontal wells due to the combined complexity of the wells and the reservoir. This reservoir is located in an offshore field that produces oil from a relatively thin oil rim. The reservoir also contains a large gas cap that provides the dominant energy for reservoir recovery. The reservoir is composed of interbedded, shallow marine-ridge sands with some coarsening-up sequences. A typical horizontal well in this field has perforation intervals of about 1,200–2,900 ft, penetrating depositional sequences from the bottom up, and produces from multiple formations. Wells are placed close to the oil-water contact, sufficiently far from the gas-oil contact to reduce the effects of gas coning and channeling. Due to the large heterogeneity of reservoir properties in different layers, complexity of the geological feature, and the dynamics within the horizontal wellbore, it is very challenging to reproduce the actual production profile in the simulation model. For example, an unfavorable combination of a sump (variation in depth) in the well trajectory and fluid holdups may prevent the toe from producing. The dynamics are difficult to capture without direct production logging and the use of special options of the simulator. In this study, appropriate technologies were applied to solve this problem. Production logging was implemented on four wells. The results revealed that some perforation intervals do not contribute to production. It also exposed allocation problems in the historical production data. This information was used to validate the performance of some wells and to calibrate other wells that exhibit different production profiles. Some simulator options such as multi-segment wells and PLT reporting have been applied to facilitate this calibration process. With this calibration, history matching becomes a more guided process, and the resulting model is more consistent with the actual performance, thus, enhancing its predictive power. This paper describes certain special wellbore dynamic behaviors that have not been covered in the literature. It illustrates the challenges of simulating horizontal wells and how production logging is used to resolve the problem and calibrate the model for better predictive power." @default.
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- W2070302001 date "2007-10-30" @default.
- W2070302001 modified "2023-10-14" @default.
- W2070302001 title "Using Production Log to Calibrate Horizontal Wells in Reservoir Simulation" @default.
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- W2070302001 doi "https://doi.org/10.2118/110412-ms" @default.
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