Download e-book for iPad: Advanced Production Decline Analysis and Application by Hedong Sun

By Hedong Sun

ISBN-10: 0128024119

ISBN-13: 9780128024119

In contemporary years, creation decline-curve research has turn into the main popular software within the for oil and fuel reservoir creation research. although, such a lot curve research is completed via laptop this present day, selling a "black-box" method of engineering and leaving engineers with little historical past within the basics of decline research. Advanced construction Decline research and Application begins from the fundamental idea of complicated construction decline research, and punctiliously discusses a number of decline tools, resembling Arps, Fetkovich, Blasingame, Agarwal-Gardner, NPI, temporary, lengthy linear stream, and FMB. a realistic systematic advent to every approach is helping the reservoir engineer comprehend the actual and mathematical types, clear up the sort curves and fit up research, examine the procedures and examples, and reconstruct all of the examples by way of hand, giving strategy to grasp the basics at the back of the software program. An appendix explains the nomenclature and significant equations, and as an extra bonus, on-line desktop courses can be found for obtain.

  • Understand the main finished and present checklist of decline tools, together with Arps, Fetkovich, Blasingame, and Agarwal-Gardner
  • Gain specialist wisdom with rules, techniques, real-world situations and box examples
  • Includes on-line downloadable laptop courses on Blasingame decline style curves and normalized pseudo-pressure of gasoline wells

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Sample text

139) indicates that the decline rate D at transient flow stage, transition stage, and boundary-dominated flow stage can be expressed by an attenuation power function. 14. This results indicate that the impact of a small period of time D∞ at the early stage on D is negligible, whereas in the large period of time at a late stage, the time-dependent items gradually attenuate, and D∞ becomes the main control factor. If Eq. 139) is substituted into Eq. , 2008) The power function method formally is similar to an exponential decline, which solves the problem of b value attenuating with time in the Arps method, and can satisfactorily match the production data prior to boundary-dominated flow.

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. In Eq. 21) If Eq. 24) The limits of integration t0 and t are substituted into Eq. 24). 26) It is known from Eq. 21) and Eq. 3. The decline rate is used to figure out the ultimate produced fluid under the harmonic decline case. 28) When t0 = tf and t = tab, the cumulative production Qf of the forecast period can be derived from Eq.

23), integrating Eq. 59) Substituting Eq. 57) and Eq. 59) into Eq. 60) Eq. 60) is the exponential decline equation. 63) Substituting Eq. 63) into Eq. 64) Based on Eq. 10), integrating Eq. 65) Substituting Eq. 65) into Eq. 67) Eq. 70) Substituting Eq. 70) into Eq. 71) Let b=− 1 N Eq. 71) is converted to qi q= 1b (1 + bDi t ) Eq. 72) is the hyperbolic decline equation. 73) Substituting Eq. 73) into Eq. 74) Integrating Eq. 75) Substituting Eq. 75) into Eq. 76) Obviously, α a1 e − b1Sw = qi Let Di = a1 b1 α B − b1Swc e Vϕ Eq.

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Advanced Production Decline Analysis and Application by Hedong Sun

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