Advanced Production Decline Analysis and Application by Hedong Sun

By Hedong Sun

In contemporary years, construction decline-curve research has develop into the main favourite software within the for oil and gasoline reservoir creation research. notwithstanding, so much curve research is finished by means of computing device this day, selling a "black-box" method of engineering and leaving engineers with little historical past within the basics of decline research. Advanced creation Decline research and Application begins from the fundamental notion of complicated creation decline research, and punctiliously discusses numerous decline equipment, corresponding to Arps, Fetkovich, Blasingame, Agarwal-Gardner, NPI, brief, lengthy linear stream, and FMB. a pragmatic systematic creation to every strategy is helping the reservoir engineer comprehend the actual and mathematical types, clear up the kind curves and fit up research, examine the methods and examples, and reconstruct all of the examples via hand, giving technique to grasp the basics in the back of the software program. An appendix explains the nomenclature and significant equations, and as an additional bonus, on-line computing device courses can be found for obtain.

  • Understand the main finished and present record of decline tools, together with Arps, Fetkovich, Blasingame, and Agarwal-Gardner
  • Gain professional wisdom with ideas, techniques, real-world circumstances and box examples
  • Includes on-line downloadable desktop courses on Blasingame decline variety curves and normalized pseudo-pressure of gasoline wells

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Example text

10 Log–log type curve matching—2 26 Advanced Production Decline Analysis and Application Randomly select a point on the transparent graph paper as the match point, and read the coordinate value of the point on the log–log paper and interpretation chart paper, (∆p)M, (∆t)M, (pD)M, (tD/CD)M. 5ln    CD  This is the matching procedure for log–log analysis of homogeneous infinite formation, that is, to conduct pressure match and time match firstly, record the corresponding match points, and figure out the formation parameters.

5ln    CD  This is the matching procedure for log–log analysis of homogeneous infinite formation, that is, to conduct pressure match and time match firstly, record the corresponding match points, and figure out the formation parameters. The log–log matching principle for the APDA is the same; apart from that, the definitions of dimensionless variables are different. 11. The possible reserves are the total volume of natural gas expected to withdraw ultimately from the discovered oil and gas reservoirs under the current technical conditions and government regulations, and it is also called ultimate recoverable reserves.

11) The limits of integration t0 and t are substituted into Eq. 13) Eq. 8) is rearranged and substituted into Eq. 14) The decline rate is used to work out the ultimate produced fluid under hyperbolic decline case. 16) Arps Decline Curves Analysis 35 When t0 = tf and t = tab, the cumulative production Qf of the forecast period can be derived from Eq. 17) Eq. 15) and Eq. 16) are rearranged and substituted into Eq. 17). 19) Based on Eq. 15) and Eq. 3 Harmonic Decline Harmonic decline is the special form of hyperbolic decline.

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