地应力与构造裂缝参数间的定量关系

doi:10.7623/syxb201001011

石油学报 ›› 2010, Vol. 31 ›› Issue (1): 68-72.DOI: 10.7623/syxb201001011

地应力与构造裂缝参数间的定量关系

季宗镇戴俊生汪必峰

中国石油大学地球资源与信息学院山东东营 257061

收稿日期:2009-03-31 修回日期:2009-08-20 出版日期:2010-01-25 发布日期:2010-05-21
通讯作者: 季宗镇

Quantitative relationship between crustal stress and parameters of tectonic fracture

JI Zongzhen DAI Junsheng WANG Bifeng

Received:2009-03-31 Revised:2009-08-20 Online:2010-01-25 Published:2010-05-21
Contact: JI Zongzhen

摘要/Abstract

摘要：

根据裂缝形成的微观原理，选用库伦—莫尔准则及格里菲斯准则作为岩石剪性及张性破裂判断依据，以岩石力学和断裂力学中应变能及表面能理论为基础，借助于表征单元体及裂缝平板渗流模型分别研究了三向挤压应力状态及有张应力存在情况下地应力与构造裂缝参数之间的定量关系并给出计算模型。使用该模型能够计算裂缝密度、开度、孔隙度、渗透率等参数，在渗透率的计算中体现了矢量参数的方向性差异。地应力与构造裂缝参数计算模型适用于砂岩、碳酸盐岩、火成岩等多种脆弹性岩层，与地应力场数值模拟相结合能够有效地进行储层裂缝的定量表征及裂缝参数的定量预测。

关键词: 构造裂缝参数, 地应力, 孔隙度, 渗透率, 储层裂缝, 定量表征, 定量预测

Abstract:

On the bases of strain energy, surface energy in rock and fracturing mechanics theory, the relationship between crustal stress and parameters of tectonic fracture was confirmed using the represent element volume and flat seepage model. The Coulumb-Mohr principle was applied to the examination of shear fracture, while Griffith principle was taken as the examination of tension fracture. The calculation model of the relationship between crustal stress and tectonic fracture parameter was developed and used to calculate aperture, density, porosity and permeability of fractures on the basis of paleo-fracture parameters. The calculated vector parameters such as permeability were anisotropy using this model. In combination with stress field numerical simulation, the calculation model is available to quantitave characterization of reservoir fractures and prediction of fracture parameters in the brittle-elasticity strata, such as sandstone, carbonate and igneous rocks.

Key words: tectonic fracture parameter, crustal stress, porosity, permeability, reservoir fracture, quantitative characterization, quantitative prediction

季宗镇戴俊生汪必峰. 地应力与构造裂缝参数间的定量关系[J]. 石油学报, 2010, 31(1): 68-72.

JI Zongzhen DAI Junsheng WANG Bifeng. Quantitative relationship between crustal stress and parameters of tectonic fracture[J]. Editorial office of ACTA PETROLEI SINICA, 2010, 31(1): 68-72.

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地应力与构造裂缝参数间的定量关系

Quantitative relationship between crustal stress and parameters of tectonic fracture

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