New PDF release: Reservoir Stimulation

By Michael J. Economides, Kenneth G. Nolte

ISBN-10: 0137744722

ISBN-13: 9780137744725

This 3rd version maintains to offers a finished examine of reservoir stimulation from an all-encompassing engineering viewpoint yet has been thoroughly rewritten to mirror the altering applied sciences within the undefined. It units forth a rationalisation of stimulation utilizing reservoir engineering suggestions, and addresses such themes as formation characterisation, hydraulic fracturing, matrix acidizing and chemical remedy. Formation harm which refers to a loss in reservoir productiveness is additionally comprehensively examined.

This wide reference paintings is still crucial analyzing for petroleum execs curious about the real actions of reservoir review, improvement and administration, who require precious talents within the software of the concepts defined for the profitable exploitation of oil and gasoline reservoirs.

individuals to this quantity are one of the such a lot well-known gurus of their person applied sciences.

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Additional resources for Reservoir Stimulation

Sample text

H r Figure I-lo-Reservoir re schematic for Darcy flow. 4P 4% = m s and, therefore, the combination of Eqs. l-65 and l-66 results in the definitive expressionfor steady-statepressure drop at the ivell. + s) (l-67) l l l Pe - Pwf = w w In + * (l-65) W The skin effect asdefinedby van EverdingenandHurst (1949)resultsin the following steady-statepressuredrop: 1-12 A similar expression for pseudosteadystate which describesthe behavior of a closed reservoir may be easily developed. The flow at the wellbore is given by 4= 2nkh 6 - pwf) (l-68) where 1c/is a geometric factor, dependenton the shape of the drainage area.

L-38) (1-14) 7. In the caseof drawdown, and on the extension of the straight line (not the actualpwf) and at t = 1 hr, obtain p1 hr. 151 Type-Curve Matching The vast majority of tight reservoir tests is not run past the appearance of the semilogarithmicstraightline, or fully infinite-acting reservoir behavior. 1. Consequently,type-curvematching (a method that is particularly applicable to early-time behavior) is the indicated method of analysis. The procedure consistsof five steps, and they have beenoutlined earlier in this chapter.

If deviation occurs, it can be attributed to boundary effects. 6. Obtain the slope (psi/cycle) and solve for the permeability. 23 > . (l-15a) In the caseof buildup and on the extension of the straight line, obtain p1 hr correspondingto the value of the Homer time function at shut-intime of 1 hr. 23 . 151 nz (l-26) b) Gas-Well Testing. In gas-well testing, the sameprocedure outlined for oil wells is employed. However, the diagnostic loglog graph shoulduseAp* (pressure-squared difference) or more appropriately the real-gas, pseudopressure difference, Am (p), which allows the viscosity, cd,and the gas deviation factor, 2, to vary with pressure.

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Reservoir Stimulation by Michael J. Economides, Kenneth G. Nolte


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