1887

Abstract

Summary

This paper focuses on the research of a new method to enhance oil recovery in fault-block reservoirs at high water cut stage. Through three-dimensional water flooding experimental analysis and Nuclear Magnetic Resonance (NMR) analysis, the distribution of remaining oil at high water cut stage in fault block reservoir is clarified from macro and micro aspect. Although the development of reservoirs has stepped into the ultra-high water cut stage, there still has a great potential for development with two kinds of remaining oil. One is located on the top of tectonic structures which is hardly swept by water flooding and the fault barrier increases the recovery difficulty of this kind. The other is the highly dispersive residual oil between wells.

The paper investigates the whole vertical structural position and presents a new development mode named bidirectional displacement to extract those two kinds of remaining oil: the top structure is for gas injection while the bottom is for water injection, thereby bidirectionally (upper and lower) compensating formation energy for oil displacement in the middle of the structure.

In the higher position, we adjust working system by injecting gas from old wells and then force the gas to migrate to the top to displace oil. During this process, a newly formed artificial gas cap is matched with reservoir scale and displaces oil by gas cap expansion energy when the reservoir pressure declines. At the bottom, we convert oil wells with high water cut into water injection wells with wide well spacing and large displacement to form the artificial edge water flood that can re-aggregate the dispersed remaining oil, achieving efficient development of remaining oil in fault-block reservoirs with bidirectional displacement.

In this paper, a typical geological model of fault-block reservoirs is built by numerical simulation, and the factors that influence the development effect are discussed by orthogonal experimental design. We obtain the influence of various development and geological factors on bidirectional displacement, optimize the working system at different developmental stages, establish a corresponding matching relationship between production and injection wells for stable development and form the screening criteria for bidirectional displacement.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201700246
2017-04-24
2024-03-29
Loading full text...

Full text loading...

References

  1. MengHao, WangYining, HaoShimeng, et al.
    [2012] Development effect evaluation and remaining Oil quantitative investigation in complex fault block oil reservoir at high water-cut period--take A fault block of Shengli oil field as example. Science Technology and Engineering, 12(32), 8667–8671.
    [Google Scholar]
  2. YouQidong, ZhouFangxi, ZhangJianliang
    . [2009] Evaluation procedure of water flooding effect of complicated small fault blocks. Petroleum Geology and Recovery Efficiency, 16(01), 78–81,116.
    [Google Scholar]
  3. ZhangYe.
    [2014] Analysis on IOR mechanism of artificial edge water flooding in complex fault-block reservoir. Fault-Block Oil & Gas Field, 21(04), 476–479.
    [Google Scholar]
  4. LiuZhihong, JuBinshan, HuangYingsong, et al.
    [2015] Experimental study on microscopic water-flooding to EOR of remaining oil through changing flow direction. Petroleum Drilling Techniques, 43(02), 90–96.
    [Google Scholar]
  5. KongXiangyan, ChenFenglei, PeiBolin
    . [1997] Similan theory, similar rule and data conversion software for water drive modeling. Petroleum Exploration and Development, 24(06), 56–60, 117.
    [Google Scholar]
  6. Sanhita Tiwari, M. SureshKumar
    . [2001] Nitrogen injection for simultaneous exploitation of gas cap. SPE Middle East Oil Show, 17–20 March, Manama, Bahrain, SPE 68169.
    [Google Scholar]
  7. NorollahKasiri, AbolghasemBashiri
    . [2009] Gas-assisted gravity drainage (GAGD) process for improved oil recovery. International Petroleum Technology Conference, 7–9 December, Doha, Qatar, SPE 13244.
    [Google Scholar]
  8. R.L.King, W.J.Lee
    . [1976] An engineering study of the hawkings woodbine reservoir. Journal of Petroleum Technology, 28(02), SPE 5528.
    [Google Scholar]
  9. BaiFenghan, ShenYouqing, MengQingchun, et al.
    [1998] Reservoir engineering research of the nirogen injection pilot in Yanling Oil Field. Acta Petrolei Sinica, 19 (4), 61–68.
    [Google Scholar]
  10. SugiantoGunawan, DidierCaie
    . [1999] Handil field:Three years of lean gas injection into water flooded reservoirs. SPE Asia Pacific Improved Oil Recovery Conference, 25–26 October, Kuala Lumpur, Malaysia, SPE 57289.
    [Google Scholar]
  11. XiongYu, SunLiangtian, SunLei, et al.
    [2002] Reasonable velocity of N2 injection nonmiscible flooding in tilting multilayer reservoir. Journal of Southwest Petroleum Institute, 24(5), 34–36.
    [Google Scholar]
  12. L.O.Carlson
    . [1988] Performance of Hawkins Field Unit under gas drive pressure maintenance operations and development of an enhanced oil recovery project. SPE Enhanced Oil Recovery Symposium, 16–21 April, Tulsa, Oklahoma, USA, SPE 17324.
    [Google Scholar]
  13. TengQi, YangZhengming, LiuXuewei, et al.
    [2013] Physical simulation of water flooding in plate model similar theory study. Science Technology and Engineering, 13(09), 2478–2482,2491.
    [Google Scholar]
  14. YanCunzhang, QinJishun, GuoWenmin, et al.
    [2005] Similarity theory of recovery percent and water cut in water flooding reservoir. Journal of the University of Petroleum, China, 29(01), 56–61.
    [Google Scholar]
  15. YangHaibo
    . [2015] Comparative experiment of water flooding rule by large-scale model. Fault-Block Oil & Gas Field, 22(05), 633–636.
    [Google Scholar]
  16. XiaoQiusheng, ZhuJuyi
    . [2009] Analysis method of rock NMR and ITS application in oil field exploration. Petroleum Geology & Experiment, 31(1), 97–100.
    [Google Scholar]
  17. DingShaoqin, GuoHekun, LiuWei, et al.
    [2006] Application of NMR rock sample analysis technique in reservoir evaluation. Petroleum Geology & Oilfield Development in Daqing, 25(6), 22–26.
    [Google Scholar]
  18. HuZhiming, GuoHekun, XiongWei, et al.
    [2009] Oil recovery mechanism using nuclear magnetic resonance technology. Journal of Liaoning Technical University(Natural Science), 28, 38–40
    [Google Scholar]
  19. RaoD.N., AyiralaS.C., KulkarniM.M., et al.
    [2004] Development of gas assisted gravity drainage (GAGD) process for improved light oil recovery. SPE /DOE Symposium on Improved Oil Recovery, 17–21 April,Tulsa, Oklahoma,USA, SPE 89357.
    [Google Scholar]
  20. KulkarniM.M., RaoD.N.
    [2006] Characterization of operative mechanisms in gravity drainage field projects through di-mensional analysis. SPE Annual Technical Conference and Exhibition, 24–27 September, San Antonio, Texas, USA, SPE 103230.
    [Google Scholar]
  21. MahmoudT., RaoD.N.
    [2007] Mechanism and performance demonstration of the gas-assisted gravity-drainage process using visual models. SPE Annual Technical Conference and Exhibition, 11–14 November, Anaheim, California, USA, SPE 110132.
    [Google Scholar]
  22. [2008] Range of operability of gas-assisted gravity drainage process. SPE Symposium on Improved Oil Recovery, 20–23 April, Tulsa, Oklahoma, USA, SPE 113474.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201700246
Loading
/content/papers/10.3997/2214-4609.201700246
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error