摘要
为定量预测大民屯凹陷储集层的裂缝分布规律,在分析区域构造应力场特征的基础上,用有限元法理论,建立了该研究区的地质、力学模型。通过三维构造应力场的模拟分析,给出了古潜山太古界储集层的第一主应力、第二主应力、第三主应力和最大剪应力分布图。根据破裂值和能量值2个评价指标得出了裂缝发育指数,用裂缝发育指数预测的裂缝发育密度与已钻井岩心裂缝统计密度有较好的吻合性,与单一的评价指标相比,提高了裂缝预测的准确度。
The distribution of reservoir fractures in Damintun sag in Liaohe field is quantitatively predicted by analysis of the regional tectonic stress field feature and establishment of rational geologic and mechanical model in this study area based on finite element approach.Through 3D tectonic stress field numerical simulation and analysis,the distribution diagram of the first,second and third principle stresses and the maximum shear stress in the Archeozoic reservoirs in the buried hill are obtained.And the composite fracture density value （β） is given based on rupture value （Ⅰ） and energy value （u） evaluation indices.The case study shows that the fracture density predicted by usingβ index is more identical with statistical density of cores fracture from drilled wells.Comparing with previous single evaluation index,the accuracy of fracture prediction is greatly increased.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2014年第5期566-569,共4页
Xinjiang Petroleum Geology
关键词
辽河油田
大民屯凹陷
储集层裂缝
三维构造应力场
裂缝预测
裂缝密度
Liaohe field
Damintun sag
reservoir fracture
3D tectonic stress field
fracture prediction
fracture density
作者简介
李春林（1965-）,男,辽宁阜新人,副教授,构造地质,（Tel）13500488697（E-mail）fx_lcl@163.com.
