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- W2080746629 abstract "Abstract This paper presents a technique to forecast the production from horizontal wells in rectangular drainage areas. The technique is useful for wells located either centrally or offcentrally in the areal drainage plane. Analytical pressure transient solutions were used to calculate the shape factor, CA, and the corresponding equivalent skin factor, sCA. Moreover, dimensionless time at which the pseudo-steady state begins is reported for centered and off-centered horizontal wells and fully penetrating infinite-conductivity vertical fractures. These results are presented in the form of easy to use correlations. Furthermore, these correlations were tested by analyzing the relevant pressure transient data reported in the literature. The pseudo-steady state shape factor, CA, and skin term, sCA, for a horizontal well approaches fully penetrating infinite-conductivity vertical fracture for very large values of dimensionless horizontal well length, LD. Knowledge of shape factor, CA, and of corresponding beginning of pseudo-steady state time, tDA, pss would facilitate computation of the horizontal well production forecast from a corresponding infinite-conductivity, fully penetrating vertical fracture forecast. The methods for prediction of the inflow performance relationship for horizontal wells is also outlined, using example problems representative of horizontal well applications in on-shore and off-shore areas. Introduction In recent years, horizontal wells have been increasingly used in field applications. Currently, various commercial techniques are available to drill, complete and test horizontal wells. The up-to-date technology of drilling, completion, testing, as well as production forecasting for horizontal wells and related vertical well technology has been reviewed by various authors. A horizontal well pressure analysis has shown that the horizontal well behaves as a vertical fracture with a fracture height equal to the wellbore diameter. The insignificant pressure drop observed in the horizontal wells indicates an infinite-conductivity for the flow in the wellbore. On the other hand, it is difficult to obtain infinite fracture conductivity in a conventional fracture stimulation. Thus, horizontal wells would provide an alternative for conventional fracture stimulation. The state of the art review of the reservoir engineering aspects of horizontal well production has been presented by Giger et al. and others. The pressure transient solutions for horizontal wells in finite and infinite reservoirs have been discussed by various authors in the literature. However, there seems to be a lack of information regarding the influence of the drainage area and its shape on horizontal well performance. The purpose of this paper is to address this issue. The shape factors indicate the influence on well productivity of well location within the drainage boundary." @default.
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- W2080746629 date "1988-10-02" @default.
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- W2080746629 title "Effect Of Drainage Area Shapes On The Productivity Of Horizontal Wells" @default.
- W2080746629 doi "https://doi.org/10.2118/18301-ms" @default.
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