Application of the Imitation Horizontal well Technique in the Development of Low Permeability Reservoirs

Abstract:

The fluid flowing resistance increase and the water absorbing capacity reduce due to the threshold pressure gradient and media deformation of the low permeability reservoirs in the course of development. The oil production of vertical wells may decrease fastly and the controlled reservers are hard to recover. The development effects are not satisfied. Through great fracturing measurements create many fractures, and fractures extended along the direction of well line, the long fracture channels were formed like horizontal well segments. This kind of long fracture was called as horizontal segment of imitation horizontal well. It can broad drainage radius in production well and increase controlled reserves and daily oil production of single well. In this paper, the influence factors of the low permeablity reservoirs development by imitation horizontal wells were analysised. Through well pattern, well distance, line distance, injector and producer parameters and fracturing parameters of imitation horizontal well optimization, drainage radius in lower permeability reservoirs can be reached to 200 meters, the daily production in single well can increase two times of that before, and the production result was improved greatly in lower permeability reservoirs development.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 1350-1353
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.1350
• Online since: August 2013
• Authors: Yan Dong*, An Zhu Xu
• Keywords: Drainage Radius, Fractures of Imitation Horizontal Segment, Heat Transfer Coefficient, Heavy Oil, Imitation Horizontal Well, Injection Paramenters Optimization, Lower Permeability Reservoir, Mechanism, Secondary Thermal Recovery, Superheated Steam Stimulation

References

[1] Yitang Zhang, Xiuluan Li, Xia Zhang, et al. "Four fundamental principles for design and follow-up of steam flooding in heavy oil reservoirs"[J]. Petroleum Exploration and Development, 2008, 35(6): 715-719.

[2] Xianghong Wu, Anzhu Xu, Hailiang Fan "An integrated evaluation on factors affecting the performance of superheated steam huff and puff in heavy oil reservoirs"[J]. Petroleum Exploration and Development, 2010, 37(5):608-613.

DOI: 10.1016/s1876-3804(10)60059-6

[3] Tongci Qu, Shuang Li. "Technique of enhancing recovery of remaining oil in heavy oil reservoirs by horizontal wells"[J]. Petroleum Exploration and Development, 2009, 36(6): 743-748.

[4] Ke Yan, Huaiqiang Ren. "Oil/water inversion and juxtaposition in heavy oil reservoirs": Taking 6-7 sand members of Guantao Formation, Gudao Oilfield as an example[J]. Petroleum Exploration and Development, 2009, 36(5): 635-640.

[5] Heins B, Xiao Xie, Dengchao Yan. "New technology for heavy oil exploitation wastewater reused as boiler feedwater"[J]. Petroleum Exploration and Development, 2008, 35(1): 113-117.

DOI: 10.1016/s1876-3804(08)60016-6

[6] Yuwen Chang, Yi Zhang, Yongjiu Hu, et al. "The progress of heavy oil thermal recovery technology"[M]. Beijing: Petroleum Industry Press, 1997.