Fracture geometry near the wellbore of a horizontal well with in-plane perforation

被引：0
|
作者：
Sun F. [1 ]
Tang M. [2 ]
Zhang X. [2 ]
Li C. [2 ]
Xue S. [1 ]
机构：
[1] College of Pipeline and Civil Engineering, China University of Petroleum <East China>, Qingdao, 266580, Shandong
[2] Oil and Gas Technology Institute, PetroChina Changqing Oilfield Company, Xi'an, 710021, Shaanxi
来源：
Natural Gas Industry | 2019年 / 39卷 / 04期
关键词：
Fracture geometry; Fracturing pressure; Hydro-mechanical coupling model; Fracture element; Perforation parameters; In-plane perforation; Near-wellbore; Numerical simulation; Tight oil and gas reservoir;
D O I：
10.3787/j.issn.1000-0976.2019.04.008
中图分类号：
学科分类号：
摘要：
The in-plane perforation is a new type of well completion method for the stimulated reservoir volume (SRV) of tight oil and gas reservoirs. Previously, however, the regulatory effects of perforation on fracture initiation position and fracture geometry near the wellbore were less studied, the spatial position of each channel of in-plane perforation was simplified as a plane, and the effects of the angle parameters of in-plane perforation on the fracturing pressure of a horizontal well and the fracture geometry near the wellbore were neglected. In order to make up for these shortcomings, a near-wellbore fracture mechanics model in the form of hydro-mechanical coupling was established in this paper. Then, local 3D fracture initiation position and geometric change of shots were characterized by using the fracture element based on continuous damage mechanics, and the finite-element numerical solving program of a coupling model was developed to investigate fracture initiation and propagation laws. Finally, the effects of perforation angle and departure angle on the initial fracturing pressure and fracture initiation position were analyzed quantitatively based on the actual perforation completion parameters of horizontal wells in the Changqing Oilfield. What's more, the fracture geometry near the wellbore of horizontal wells with in-plane perforation was compared with that with helical perforation. And the following research results were obtained. First, the fracturing pressure and fracture initiation position of the horizontal wells with controllable perforation vary with perforation angle and departure angle. The fracturing pressure of channel varies greatly, and fracture initiation occurs at different positions, e.g. the perforation-wellbore interface and the middle part of the channel. The in-plane perforator shall control the departure angle in the range of 15°-30°. Second, by changing the jet direction of channels, in-plane perforation increases the stress interference between the channels, so as to reduce the fracturing pressure of horizontal wells by 2.0-3.5 MPa. Third, the in-plane perforation can guide and control the fracture strike near the wellbore, so as to produce the initial fracture plane perpendicular to the wellbore of horizontal wells and avoid the distortion of near-wellbore fractures caused by helical perforation. In this way, the completion degree of the fracture the system near the wellbore of a horizontal well is improved. In conclusion, the near-wellbore fracture mechanics model established in this paper can simulate the perforation and near-wellbore dynamic fracture process of a horizontal well, and its calculation results are better accordant with the field test data. © 2019, Natural Gas Industry Journal Agency. All right reserved.
引用
收藏
页码：62 / 68
页数：6
相关论文
共 25 条
  • [1] Liu H., Wang F., Wang Y., Gao Y., Cheng J., Oil well perforation technology: Status and prospects, Petroleum Exploration and Development, 41, 6, pp. 731-737, (2014)
  • [2] Behrmann L.A., Nolte K.G., Perforating requirements for fracture stimulations, SPE Formation Damage Control Conference
  • [3] Li G., Huang Z., Niu J., Zhang S., Research advance of the influence of geostress and perforation parameters on hydraulic fracturing, Journal of the University of Petroleum, China (Edition of Natural Science), 29, 4, pp. 136-142, (2005)
  • [4] Li H., Wang Y., Li H., Ge Y., An optimum perforation design method for prefracturing wells, Natural Gas Industry, 18, 2, pp. 53-56, (1998)
  • [5] Chen H., Tang K., Chen F., Chen J., Li B., Ren G., Oriented cluster perforating technology and its application in horizontal wells, Natural Gas Industry, 36, 7, pp. 33-39, (2016)
  • [6] Abass H.H., Hedayati S., Meadows D.L., Nonplanar fracture propagation from a horizontal wellbore: Experimental study, SPE Production & Facilities, 11, 3, pp. 133-137, (1996)
  • [7] Van de Ketterij R., De Pater C., Impact of perforations on hydraulic fracture tortuosity, SPE Production & Facilities, 14, 2, pp. 131-138, (1999)
  • [8] Hu Y., Zhao J., Zeng Q., Xu S., Xie H., Finite element method to calculate fracture pressure of perforated well hydraulic, Natural Gas Industry, 23, 2, pp. 58-59, (2003)
  • [9] Zhang G., Chen M., Complex fracture shapes in hydraulic fracturing with orientated perforations, Petroleum Exploration and Development, 36, 1, pp. 103-107, (2009)
  • [10] Alekseenko O.P., Potapenko D.I., Cherny S.G., Esipov D.V., Kuranakov D.S., Lapin V.N., 3-D Modeling of fracture initiation from perforated non-cemented wellbore, SPE Hydraulic Fracturing Technology Conference
123