宝北背斜逆断层形成数值模拟研究  

Numerical simulation research on thrust fault forming of Baobei anticline in Baolang Oilfield

作　　者：李远光[1] 梁杰锋[1] 廖晶[1] 杨冬玉[2] 韩春林[1] 高立建[3] 

机构地区：[1]中国石化河南油田分公司石油勘探开发研究院,河南南阳473132 [2]西安石油大学石油工程学院,陕西西安710065 [3]中国石化河南油田分公司第一采油厂,河南桐柏474780

出　　处：《断块油气田》2011年第5期598-601,共4页Fault-Block Oil & Gas Field

摘　　要：宝北地区的三级断层使油层分布和油水关系复杂化,直接影响了砂体分布及注采连通状况。该区三级断层全部为逆断层,受挤压应力作用形成,储层中岩屑含量高,断层封闭性强,因此在原始状态下,三级断层对油气分布起到局部控制作用。针对宝北背斜构造特点,提出了冲起构造模式。利用区域地质构造研究成果、地球物理成果和精细地层对比资料,建立三维地质模型、力学模型和三维有限元数值模型,并采用大型非线性三维有限元数值模拟软件MARC进行构造数值模拟,从理论上解释了区内逆断层形成的力学机制、组合形式及分布规律。The sand body distribution and connectivity status of injection-production are affected directly due to the complication of the oil layer and relation of oil-water by tertiary fault in Baobei Region. Because of the extrusion stress acting, the tertiary faults all are thrust faults. In the reservoir, the content of cuttings is high and the fault sealing is good. Therefore, the tertiary faults make a partial impart on hydrocarbon. Aimed at the structural characteristics of Baobei anticline, the model of lifting structure is established. Using the research findings of structure and geophysics, and the data of strata correlation, the three-dimensional geologic model, mechanics model and three-dimensional finite element model are established. Furthermore, the structural numerical simulation is carried out using the software MARC with large non-linear finite element numerical simulation. This paper also interprets the forming mechanics, array configuration and distribution rule of thrust fault in theory.

关 键 词：数值模拟 逆断层 形成机理 宝北背斜 

分 类 号：TE121.2[石油与天然气工程—油气勘探]