Advanced Production Decline Analysis and Application by Hedong Sun
By Hedong Sun
In fresh years, construction decline-curve research has turn into the main frequent instrument within the for oil and gasoline reservoir construction research. notwithstanding, such a lot curve research is finished by way of computing device 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 starts off from the elemental inspiration of complex construction decline research, and punctiliously discusses numerous decline equipment, comparable to Arps, Fetkovich, Blasingame, Agarwal-Gardner, NPI, brief, lengthy linear move, and FMB. a pragmatic systematic creation to every process is helping the reservoir engineer comprehend the actual and mathematical types, clear up the kind curves and fit up research, study the methods and examples, and reconstruct the entire examples through hand, giving solution 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 desktop 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 specialist wisdom with ideas, approaches, real-world situations and box examples
- Includes on-line downloadable laptop courses on Blasingame decline variety curves and normalized pseudo-pressure of fuel wells
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Extra info for Advanced Production Decline Analysis and Application
Example text
49), and Eq. 52) are the conversion factors under different unit systems, respectively. 2 Theoretical Fundamentals of Arps Production Decline Arps developed the three production decline equations based on his experience. However, he as well as most of later researchers did not conduct any research related to filtration theory. Bingyu Ji (1995), starting from the relative permeability curve and material balance principle, derived three Arps decline equations and demonstrated that the rate decline equation of waterdrive reservoir depends mainly on the characteristics of relative permeability to oil curves.
10. 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.
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.