大民屯凹陷构造裂缝的综合定量预测  

Comprehensive and Quantitative Prediction of Tectonic Fractures in Damintun Sag,Liaohe Field

作　　者：李春林[1] 王蕾[1] 李良峰[2] 

机构地区：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [2]中国石油大港油田分公司滩海开发公司,天津300280

出　　处：《新疆石油地质》2014年第5期566-569,共4页Xinjiang Petroleum Geology

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.

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 

分 类 号：TE112.23[石油与天然气工程—油气勘探]