Applying Interpretation Results of Drill Stem Test to Evaluate the Lower Miocene Formation in Bao Den Oilfield, Cuu Long Basin

Document Type : Research Paper

Authors

1 Faculty of Geology & Petroleum Engineering, Vietnam National University, Ho Chi Minh City, Vietnam.

2 Faculty of Geology & Petroleum Engineering, Vietnam National University, Ho Chi Minh City, Vietnam

Abstract

The present research is aimed at exploring the B1.1 sandstone sequence located in the lower Miocene formation within the Bao Den oilfield situated in the Cuu Long basin. This study involves utilizing Pressure-Volume-Temperature well parameters, such as bubble pressure, oil gas ratio, oil formation volume coefficient, density, viscosity, total compressibility, and BI.1 sandstone sequence parameter, including effective thickness, average porosity, well radius, and water saturation. Our focus will be on analyzing reservoir tests with two methods - the conventional and progressive approaches. This study will examine the Horner graph and how it can be used with formulas for determining initial reservoir pressure, slope, and fluid conductivity as part of the traditional method. Additionally, effective permeability, skin coefficient, and conductivity will also be analyzed. The advanced method involves using Ecrin software to interpret results, which shows that both methods yield favorable skin coefficients. The outcomes indicate that the well and reservoir parameters are precisely determined: the initial pressure of the reservoir is 2617.5 psia, hydro conductivity equals 7680 mD.ft, while permeability is 106 mD, coefficient Skin is 14, well storage coefficient evaluates to 5.61E-4 and distance to fault 439 ft. Based on the results, it is possible to assess that the BD-1X well in the Bao Den oilfield has promising potential as both oil and gas have favorable quality and volume attributes. This study's significance is providing input data for developing and exploiting oil fields resulting in choosing economical plans with commercial efficiency within the petroleum industry.

Keywords

Main Subjects

References

[1] Dolan JP, Einarsen CA, Hill GA. Special applications of drill-stem test pressure data. Transactions of the AIME. 1957 Dec 1;210(01):318-24. https://doi.org/10.2118/851-G
[2] Dubiel S, Rzyczniak M, Solecki M, Maruta M. Analysis of drill stem test (DST) results at Osobnica oil field, in terms of sampling of selected technology parameters. AGH Drilling, Oil, Gas. 2017;34(2):375-84.  https://10.7494/drill.2017.34.2.375
[3] Thanh L, An N, Duc N. New approach in analyzing gas wells with high CO2 content. Petrovietnam Journal. 2018; 9: 35-40. Available from: https://doi.org/10.25073/petrovietnam%20journal.v9i0.89
[4] Tuan N, Xuan TV, Huong TT, Thanh TQ, Quang HT. Applying Interpretation Results of Drill Stem Test to Evaluate the Lower Miocene Formation in Bao Den Oilfield, Cuu Long Basin. Journal of Chemical and Petroleum Engineering. 2024 Feb 21. https://doi.org/10.25073/petrovietnam journal.v4i0.252
[5] PVEP-POC. Ca Vang Well Testing Service Report DST#2. 2013.
[6] Nguyen T, Tran XV, Truong TQ, Tran TV. Generation Provenances of Lower Miocene Petroleum Classic Formation in Cuu Long Basin. Journal of Chemical and Petroleum Engineering. 2023 Dec 1;57(2):209-25.
[7] Van Xuan T, Chuc ND, Tuan N, Thanh TQ, Au PV. Depositional environment of E Oligocene sedimentary and prediction of sand distribution in Southeast area, Cuu Long basin. Science & Technology Development Journal: Natural Sciences. 2020 Jun 15;4(2):530-46. https://doi.org/10.32508/stdjns.v4i2.894
[8] Breitfeld HT, Hennig-Breitfeld J, BouDagher-Fadel M, Schmidt WJ, Meyer K, Reinprecht J, Lukie T, Cuong TX, Hall R, Kollert N, Gough A. Provenance of Oligocene–Miocene sedimentary rocks in the Cuu Long and Nam Con Son basins, Vietnam and early history of the Mekong River. International Journal of Earth Sciences. 2022 Sep;111(6):1773-804. https://doi.org/10.1007/s00531-022-02214-0
[9] Phach P, Anh L. Tectonic evolution of the southern part of Central Viet Nam and the adjacent area. Geodynamics & Tectonophysics. 2018; 9(3): 801–825. Available from: https://10.5800/GT-2018-9-3-0372
[10] Duc NA, Ngoc NH, Anh NL. Building porosity model of fractured basement reservoir based on integrated seismic and well data in Hai Su Den field, Cuu Long basin. Petrovietnam Journal. 2014 Jun 30;6:11-9. http://tapchidaukhi.vn/index.php/TCDK/article/view/569/514
[11] Schmidt WJ, Hoang BH, Handschy JW, Hai VT, Cuong TX, Tung NT. Tectonic evolution and regional setting of the Cuu Long Basin, Vietnam. Tectonophysics. 2019 Apr 20;757:36-57. https://doi.org/10.1016/j.tecto.2019.03.001
[12] Dung T, Tran N, Chu VN, Nguyen TH. Evolution of Geological Structural and Sedimentary Environment Change in Miocene of Phu Khanh Basin. VNU Journal of Science: Earth and Environmental Sciences. 2019 Mar 27;35(1). https://doi.org/10.25073/2588-1094/vnuees.4368
[13] Tarek A. Reservoir Engineering Handbook. Third Edition. 2016.
[14] Black WM. A review of drill-stem testing techniques and analysis. Journal of Petroleum Technology. 1956 Jun 1;8(06):21-30. https://doi.org/10.2118/589-G
[15] Olivier H, Didier V, Ole S. Dynamic Flow Analysis. KAPPA. 2008; V4.10.01. Available from: https://blasingame.engr.tamu.edu/z_zCourse_Archive/P324_reference/P324_Supplemental_Text_Materials/PTA_Kappa_DFA_Book_[Houze_2008]
[16] Kappa. Saphir Guided Session. 2007. https://download.kappaeng.com/download/free/tutorials/saphir/SapGS01
[17] Schlumberger. Introduction to Well Testing. 1998.
[18] Schlumberger. Well test Interpretation. 2002.
[19] Baker R. Oil and Natural Gas: Offshore Operations. https://doi.org/10.1016/B0-12-176480-X/00258-8
[20] Cui Y, Shao L, Qiao P, Pei J, Zhang D, Tran H. Upper miocene–pliocene provenance evolution of the Central Canyon in northwestern South China Sea. Marine Geophysical Research. 2019 Jun 15;40:223-35. https://doi.org/10.1007/s11001-018-9359-2
Journal of Chemical and Petroleum Engineering
Volume 58, Issue 2
December 2024
Pages 209-228

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History

  • Receive Date: 08 January 2024
  • Revise Date: 20 February 2024
  • Accept Date: 21 February 2024

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