Dissertation > Excellent graduate degree dissertation topics show

Study on the Fracture Initiation and Propagation for Horizontal Well Fracturing

Author: WangJiBo
Tutor: ZuoYuanGang
School: Xi'an University of Petroleum
Course: Oil and Gas Field Development Project
Keywords: Horizontal well Hydraulic Fracturing Fracture initiation Fracture propagation
CLC: TE357
Type: Master's thesis
Year: 2010
Downloads: 461
Quote: 0
Read: Download Dissertation

Abstract


The domestic fracturing effect of the horizontal wells is not ideal presently, and one of the reasons is that the fracture formation mechanism is not well understanded and the fracture initiation and propagation law are not deeply studied on in the horizontal wells especially.Using the logging and fracturing information in XueCha district of YanChang Oil field,the following data is calculated such as Poisson ratio 0.18, Young’s modulus 23.7GPa, minimum level earth stress 20.6MPa and maximum level earth stress 33.6 MPa. In this base, the interspace model considering the hole is set up and the mathematic simulation is brought into production with the finite element method. It is thought that the fracturing pressure is mainly affected by the minimum level earth stress, impacted obviously by wellbore orientation, perforation orientation and perforation density and indistinctly influenced by the perforation length and diameter. It is forecasted that the fracturing pressure of XuePing 1 well is 35MPa. Based on two-dimensional and three-dimensional crack propagation models that have existed and considering the impact of some factors such as pressure drop gradient of the crack height to the crack extension, the improved model of quasi three-dimensional crack extension is founded and the numerical method is given.It is thought that the fracture height increases obviously when the delivery rate is increased and the fracture height is increasing continuously when the fracture length increases.When the fracture half length is more than 130m,the augmentation of the fracture height is swelling. Without considering the vertical size of the crack and perforated completion and based on the maximum tensile stress criterion and Lagrange Multiplier method, the turing model of the crack near wellbore is founded. The calculated result indicates that there exists the the frature turning near wellbore and when wellbore orientation increases, the distance of the fracture turning finishing away from wellbore continuously decreases. It is believed that when the wellbore vertical with the maximum horizontal earth stress is optimal.

Related Dissertations

  1. Research on Mechanism Analysis and Modeling Simulation of Horizontal Well Tractor,P631.83
  2. Study on Hydraulic Fracturing of Low Permeability Reservoir,P618.13
  3. Study on the Numerical Simulation for the Propagation Process of 3D Built-In Fractureand of Rock,TU452
  4. Research on the Measuring Method and Instrument of the Horizontal Well’s Deviation,P631.81
  5. Based on Nonliner Finite Element Analysis of the Infilled Wall Frame Structure,TU323.5
  6. Analysis of the Basic Characteristics and Deformation Mechanism of Kualiangzi Landslide in Zhongjiang,P642.22
  7. Study and Application of Water Resources Carrying Capacity Based on Ecological Environmental Water Requirements,X171
  8. Researchs on Horizontal Mergers and Acquisitions Value Creation of China’s Listed Companies,F224
  9. Astudy on Supply Chain Integrationafter Retailing Horizontal M&A,F721
  10. Study on Fiscal Capacity of Cross-horizontal Inequality under the Condition of Equalization of Basic Public Services,F812.2
  11. L-Edit - based design and MINITAB , JMP analysis of high-current characteristics of the transistor (NPN type) to enhance,TN322
  12. The Load Balance Design and Application of Monternet Business,TN929.5
  13. Design and Implementation of Cluster Industry Application GateWay,TN915.05
  14. Studies on the Technology of Passive Time-Reversing Location,TN911.7
  15. The Research of Evolution of the Chinese Horizontal Bar Project,G832
  16. \,J609.1-4
  17. Study on In-Situ Stress Measurement of Hydraulic Fracturing Method and Stability of BHL Tunnel Rock in Korea,U451.2
  18. Study of the Optimization and Layout of the Expressway Network of Fujian Province,U412.1
  19. Intra-Industry Trade Research Based on Product Deference,F426.471
  20. Research on Bilateral Shear Strength of Rectangular Frame Columns under Seismic Action,TU375.4
  21. The Study on Test and Numerical Simulation about Dewatering of Horizontal Well,TU46

CLC: > Industrial Technology > Oil and gas industry > Oil and gas development and mining > Production Engineering > Enhanced oil recovery and maintain reservoir pressure (secondary and tertiary oil recovery )
© 2012 www.DissertationTopic.Net  Mobile