西南石油大学学报(自然科学版)

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Research on Rock Brittleness Experiment and Logging Prediction of
Hydraulic Fracture Height & Width

Xia Hongquan1, Yang Shuangding2, Gong Haohao1, Wang Chenglong1   

  1. 1. Petroleum Engineering Logging Lab,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. CPL Changqing Branch,Xi’an,Shannxi 710200,China
  • Online:2013-08-01 Published:2013-08-01

Abstract:

With the development of Changing Oilfield exploration and exploitation,low porosity and permeability reservoir has
become a major object of exploration and development. The reservoirs of almost all wells go through fracturing transformation
before they have the capacity. The brittle rock sectional variation should be considered in reservoir fracturing,as brittleness
coefficient indirectly reflects the degree for difficulty of the reservoir pressure to open from rock mechanics angle. Taking the
Yanchang reservoir of Changing Oilfield in Jiyuan area for example,we get the rock brittleness coefficient and calculate the
dynamic rock brittleness coefficient of calibration logging with the core of triaxial test data(Young’s modulus and Poisson’s
ratio),by this we establish the continuous rock brittle coefficient of profile. Quantitative relationship between the rock brittleness
coefficient B and minimum horizontal stress S h is established,and quantitative prediction of fracture height and width is
realized based on reservoir rock brittleness coefficient. Application of this method to the work area wells fracturing renovation
project generated good results,which proves its worth of wide application.

Key words: core brittle experiment, rock brittleness coefficient, fracture height, fracture width, logging prediction