成都理工大学学报（自然科学版）2017，Vol.44Issue(1)：57-66,10.DOI:10.3969/j.issn.1671-9727.2017.01.08
泾河地区中生界致密油藏天然裂缝发育主控因素及模式
Study on the main controlling factors and development models of Mesozoic natural fractures in the Jinghe oilfield,South of Ordos Basin,China
摘要
Abstract
The development of natural fractures in the typical tight sandstone reservoir of Jinghe oilfield is the key to the high yield of this kind of reservoir.The identification of natural fractures in drilling well profile is carried out through the studies of field outcrop data,drilling core data, conventional logging data and imaging logging data.Based on the comparison of the mechanical properties of faults and fractures and the analysis of relationship between fracture development index and the distance of adjacent faults in work area,two sets of conjugate shear fractures are identified. One set of fracture is close to the fault with higher fracture development index and is well developed than the other set.Comparison in different lithologies of the fracture development and analysis of fracture development index and ratio of sandstone with strata thickness shows that with the increase of clay content,lithology are gradually changed to mudstone,fracture development degree is reduced gradually,and fractures are usually developed in place with higher ratio of sandstone to strata thickness.The relationship between the structural curvature of the Chang-8 strata and the fracture growth index is analyzed.It is indicated that the larger the structural curvature is,the higher the degree of the development of the fractures.The understanding of development characteristics of natural fractures in Chang-8 reservoir of Jinghe oilfield and its main controlling factors are of important significance on the evaluation of the reservoir,and on the future production development strategy and development plan.关键词
泾河地区/延长组/致密油藏/天然裂缝/主控因素Key words
Jinghe area/Yanchang Formation/tight sandstone reservoir/nature fracture/main controlling factor分类
能源科技引用本文复制引用
罗斌,邓虎成,黄婷婷,彭先锋,毕钰,张小菊,欧浩淼,邹昀廷..泾河地区中生界致密油藏天然裂缝发育主控因素及模式[J].成都理工大学学报（自然科学版）,2017,44(1):57-66,10.基金项目
国家自然科学基金项目（41202096）。 （）
