Influences of lithology on in-situ stress field in low permeability reservoirs in Bonan Oilfield, Bohai Bay Basin, China

论文摘要

The differences of rock mechanical properties were analyzed based on triaxial compression test in low permeability reservoirs of the Bonan Oilfield. Through the analysis of reservoir mechanics, the influence mechanisms of different mechanical properties of rocks on reservoir in-situ stress were studied. By means of stress ellipse and finite element simulation, the influence rules of different mechanical properties of rocks on in-situ stress field were discussed. For the low permeability reservoirs of the Bonan Oilfield, the coarser rock has a larger Young’s modulus value and a lower Poisson’s ratio. The rock mechanical parameters and stress-strain relationship of sandstone facies and mudstone facies are different. Different rocks have different mechanical properties, which cause extra stress at the lithological contact interface, and the existence of extra stress affects the reservoir in-situ stress. Without considering the influence of structural features on the in-situ stress field, the reservoir in-situ stress is controlled by the magnitude of extra stress and the angle between lithological contact surface and boundary stress.

论文目录

文章来源

类型: 期刊论文

作者: LI Zhipeng,LIU Xiantai,YANG Yong,BU Lixia

来源: Petroleum Exploration and Development 2019年04期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 石油天然气工业

单位: Exploration and Development Research Institute of Shengli Oilfield Company,Sinopec,Dongxin Oil Extraction Plant of Shengli Oilfield Company,Sinopec

基金: Supported by the China National Major Demonstration Project(2017ZX05072)

分类号: TE348

页码: 729-738

总页数: 10

文件大小: 1165K

下载量: 9

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