西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

岩石脆性实验及压裂缝高度与宽度测井预测

夏宏泉1,杨双定2,弓浩浩1,王成龙1   

  1. 1. 西南石油大学石油工程测井实验室,四川成都610500
    2. 中国石油集团测井有限公司长庆事业部,陕西西安710200
  • 出版日期:2013-08-01 发布日期:2013-08-01
  • 基金资助:

    “973”项目《中国南方海相页岩气高效开发的基础研究》专题《页岩气水平井钻完井关键基础研究》研究成果。

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

摘要:

随着长庆油田勘探开发的不断深入,低孔低渗储层已成为主要勘探开发对象,几乎所有井的储层都要经过
压裂改造才有产能。储层压裂改造的规模需要考虑岩石脆性剖面变化特征,其脆性系数从岩石力学的角度间接反映
了储层被压开的难易程度。以长庆油田姬塬地区延长组地层为例,通过岩芯三轴脆性实验数据(杨氏弹性模量和泊松
比)得到岩石脆性系数,并用其校正测井计算的岩石脆性系数,由此建立连续的岩石脆性系数剖面。在此基础上,推导
并建立了岩石脆性系数与最小水平地应力的定量关系式,实现了基于岩石脆性系数的储层压裂缝高度与宽度的定量
预测。将此方法应用于工区多口油井的压裂改造工程中,取得了良好的效果,值得推广应用。

关键词: 岩石脆性实验, 脆性系数, 压裂缝高度, 压裂缝宽度, 测井预测

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