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Geosciences Journal

, Volume 22, Issue 2, pp 241–252 | Cite as

Prediction of natural fractures in the Lower Jurassic Ahe Formation of the Dibei Gasfield, Kuqa Depression, Tarim Basin, NW China

  • Wei Ju
  • Ke Wang
  • Guiting Hou
  • Weifeng Sun
  • Xuan Yu
Article

Abstract

The Lower Jurassic low porosity and low permeability Ahe Formation is the major reservoir of Dibei Gasfield in the Kuqa Depression, Tarim Basin. Natural fractures are important spaces for storage of hydrocarbons in low permeability reservoirs and can significantly improve the fluid flow capability; therefore, predicting the location and intensity of natural fractures in the Ahe Formation are of extreme importance. In the present study, the Late Himalayan paleotectonic stress field, the period of time when the majority of natural fractures generated in the Dibei Gasfield, was simulated and investigated with a three dimensional finite element (3D FE) model, which serves as a starting point for the prediction. Based on the principle of energy conservation and simulated paleotectonic stress field, the relationship between fracture density and stress parameter was established, and hence, natural fractures in the Ahe Formation of Dibei Gasfield were predicted. The results indicated that the development and distribution of natural fractures were primarily fault-controlled. Regions with well-developed natural fractures were mainly located in fault zones and around faults. Tectonic activities and ultra-high pressures were the dominant factors for natural fractures in the Ahe Formation. Regions with higher development degree of natural fractures in the Ahe Formation usually have a larger gas production; therefore, regions among Well Y1, B3, X1 and B2 should be focused in the Dibei Gasfield.

Key words

natural fracture numerical simulation low permeability reservoir Dibei Gasfield Ahe Formation 

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Copyright information

© The Association of Korean Geoscience Societies and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Wei Ju
    • 1
    • 2
  • Ke Wang
    • 3
  • Guiting Hou
    • 4
  • Weifeng Sun
    • 2
  • Xuan Yu
    • 4
  1. 1.Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of EducationChina University of Mining and TechnologyXuzhouChina
  2. 2.School of Resources and GeosciencesChina University of Mining and TechnologyXuzhouChina
  3. 3.PetroChina Hangzhou Research Institute of GeologyHangzhouChina
  4. 4.School of Earth and Space SciencePeking UniversityBeijingChina

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