Hazim N. Dmour, M. Shokir Eissa


Worldwide there are vast reserves of natural gas trapped in tight sandstone formation and due to the low viscosity of natural gas it can be easily recovered. To produce this huge amount of reserve from low permeability formation economically, hydraulic fracturing can be applied. Therefore, the objective of hydraulic fracturing for well stimulation is to increase well productivity by creating a highly conductive path (compared to reservoir permeability) a distance away from the wellbore into the formation.
The post treatment performance provides a good indication of stimulation success, whereas, pressure transient (PTA) and production data analysis for hydraulically fractured vertical well remains the most applied method to determine the reservoir and fracture parameters. Therefore, this analysis is a key element for optimization of hydraulic fracturing process and forecasting well performance.
This paper discus the analysis of pressure and production data from hydraulically fractured vertical well in low permeability sandstone reservoir. Whereas, Pressure transient analysis is used to evaluate the effective fracture parameters such as fracture half-length, fracture conductivity and reservoir properties. Field example of application of production data analysis for vertical fractured well are presented. The aim of this study is to evaluate the gas well productivity as a result of hydraulic fracturing treatments compared to the pre fracturing productivity and to estimate the petrophysical properties of the gas well from MIT testing data. Moreover, a discussion of how significant the increment in gas productivity was achieved with a very high propped fracture treatment success rate, is also presented. Furthermore, a view of how the correct design of fracture treatments can enhance reservoir performance and the recovery rate is discussed in details.

Полный текст:



>1. Cheng, Y., Lee, W.J., McVay, D.A.: “A New Approach for Reliable Estimation of Hydraulic Fracture Properties in Tight Gas Wells,” SPE paper 105767, presented at the 2007 SPE Hydraulic Fracturing Technology Conference, College Station, TX, USA. January 29-31.

2. Cleary, M.P.: “Comprehensive Design Formulae for Hydraulic Fracturing,” paper SPE 9259 presented at the 1980 SPE Annual Technical Conference and Exhibition, Dallas, September 21-24.

3. Ding, Y.: “Modeling of Fractured Wells in Reservoir Simulation,” paper SPE 36668 presented at the 1996 Annual Technical Conference and Exhibition, Denver, Colorado, 6-9 October.

4. Dusterhoft, R., Nguyen, P.D. and Conway, M.: “Maximizing effective Proppant Permeability under High Stress, High Gas Rate Conditions,” SPE paper 90398, presented at the 2004 SPE Annual Technical Conference and Exhibition, Houston, TX, September 26-29.

5. Earlougher, R.C.: “Advances in Well Test Analysis”, SPE monograph series Vol. 1, 1967.

6. Fetkovich, M.J. et al.: “Depletion Performance of Layered Reservoirs without Crossflow,” SPEFE (Sept. 1990) 310.

7. Horne, R.S.: “Modern Well Test Analysis: A computer Aided Approach”, 2nd edn, Petroway Inc., Palo Alto, CA (1995)35.

8. Holditch, S.A.: “Tight Gas Sands,” SPE 103356, June 2006.

9. Holditch, S.A., Rahim, Z.: “Developing Data Sets for Three Dimensional Fracture Propagation Models,”paper SPE 26155 presented at the1993 SPE Gas Technology Symposium, Calgary, Alberta, June 28-30.

10. Lee, W.J., Holditch, S.A.: “Fracture Evaluation with Pressure Transient Testing in Low-Permeability Gas Reservoir,” paper SPE 9975, June 1981.

11. Medeiros, F., Kurtoglu, B., Ozkan, E., Kazemi, H.: “Analysis of Production Data From Hydraulically Fractured Horizontal Wells in Tight, Heterogeneous Formations,” SPE paper 110848, presented at the 2007 SPE Annual Technical Conference and Exhibition held in Anaheim, California, USA, Nov.11-14

12. Nolte, K. G.: “Determination of Fracture Parameters from Fracturing Pressure Decline,” SPE 8341, presented at the 1979 Annual Technical Conference and Exhibition, Las Vegas, NV, Sept 23-26,

13. Rahim Z. and AlQahtani, M.Y.: “Selecting Perforation Intervals and Stimulation Technique in the Khuff Reservoir for Improved and Economic Gas Recovery,” paper SPE 68126 presented at the 2001 SPE Middle East Oil Show, Bahrain 17-20 March.

14. Rushing J.A. and Blasingame T.A.: “Integrating Short-Term Pressure Buildup Testing and Long-Term Production Data Analysis to Evaluate HydraulicallyFractured Gas Well Performance”, paper SPE 84475 presented at the 2003 SPE Annual Technical Conference and Exhibition, 5-8 October, Denver, Colorado.


  • На текущий момент ссылки отсутствуют.