油气藏评价与开发 ›› 2018, Vol. 8 ›› Issue (1): 16-23.

• 油气藏评价 • 上一篇    下一篇

基于响应面法的油田深部地层变形的数值试验研究

刘建军,郑永香,张伯虎,纪佑军   

  1. 西南石油大学地球科学与技术学院,四川 成都,610500
  • 收稿日期:2016-08-29 发布日期:2018-12-05 出版日期:2018-02-26
  • 作者简介:刘建军(1972—),男,博士,教授,博士生导师,石油地质工程方面研究
  • 基金资助:
    国家科技重大专项“页岩气渗流规律与气藏工程方法”(2017ZX05037001)

Numerical study on deformation of deep formation in oilfield based on response surface method

Liu Jianjun,Zheng Yongxiang,Zhang Bohu,Ji Youjun   

  1. (School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China)
  • Received:2016-08-29 Online:2018-12-05 Published:2018-02-26

摘要:

在油田开发过程中,注水作业会打破原有地层的应力平衡状态,造成深部地层岩体变形甚至失稳破坏,并对油田开发效果造成影响。为了探寻影响深部地层变形失稳的主要因素,基于流固耦合理论,通过超拉丁方试验设计方法对油田注水涉及的不同因素进行了五因素三水平的实验分析,通过响应面法对实验得到的33组试验进行回归和因子分析,得到了各因子与地层变形的响应变量之间的关系。研究表明:地层注水变形过程中,注水压力对地层的应力场和变形场的影响都极大。储层的性质对于地层有效应力,初期较后期的影响更为显著;对于水平应变,初期的显著性较弱,后期逐渐提高;对于竖向沉降量,无较大影响。岩石力学性质的弹性模量对地层有效应力的影响较小,对水平应变和竖向沉降位移具有极大的显著性。

关键词: 注水开发油田, 地层变形, 超拉丁方试验, 响应面法, 影响因素

Abstract:

During the development of the oilfield, the water flooding disturbs the primary reservoir pressure, leads to the deformation of the deep formation in the oilfield and affects the extraction ratio of oil. In order to obtain the main effect parameters of the deformation, an experiment with 3 levels for 5 parameters was conducted by Hyper-Latin square experiment based on fluid-solid coupling theory. Then, the relationships among the deformation response and the different parameters were obtained after the regression and analysis by RSM method for 33 designed experiments. The results show that the injection pressure has significant influence on the effective stress and deformation. And the properties of the reservoirs affect more on the initial stage for the effective stress, however, the later period for the normal strain. The elastic modulus of the rock mechanics properties has little effect on the effective stress, and is a significant parameter for the normal strain and subsidence.

Key words: water flooding, stratum deformation, hyper-latin square experiment, response surface method, effect factor

中图分类号: 

  • TE341