陕甘宁盆地靖安地区区域裂缝及对开发的影响
|
摘要
通过露头、古地磁定向岩心与薄片及有限元三维数值模拟研究，靖安地区主要发育有东西向和南北向两组区域裂缝，局部地段还分布有北东向和北西向裂缝．裂缝规模大，产状稳定，延伸长，构成较好的网络系统．裂缝的分布受岩层控制，垂直于层面，其间距呈正态函数分布，并与岩层厚度呈较好的线性相关关系．由于受岩性、层厚等因素的影响，使裂缝在纵向上的发育程度有较大差异，其中以长６层裂缝最发育．裂缝系统控制了该区低渗透储集层的渗透性，影响着开发井网的布置、水平井设计、压裂改造方案设计以及注水管理．
According to the study of outcrops, paleomagnetism oriented cores and thin
sections, and the result of finite element 3D numerical simulation, it is known that there are two
sets of main regional fractures in westestern and northsouthern directions seperately, the other
two sets of fractures in eastnorthern and westnorthern directions only distributed in partial
region. They are big, steady and long, and make up reasonably distributing network. The
fractures are controlled by rock strata, and are perpendicular to stratification planes. The
fracture spacings are log-normal distribution, and changes linearly with stratum thickness.There
is a great difference in logitudinal development of the fractures, which is influenced by the
factors of lithology, stratum thickness, and so on. The fractures of Cheng 6 stratum developed
best. The fractures control the permeability of reservoirs in this area, and influence well pattern
arrangement, horizontal well design, fracturing plan and water flooding management.
According to the study of outcrops, paleomagnetism oriented cores and thin
sections, and the result of finite element 3D numerical simulation, it is known that there are two
sets of main regional fractures in westestern and northsouthern directions seperately, the other
two sets of fractures in eastnorthern and westnorthern directions only distributed in partial
region. They are big, steady and long, and make up reasonably distributing network. The
fractures are controlled by rock strata, and are perpendicular to stratification planes. The
fracture spacings are log-normal distribution, and changes linearly with stratum thickness.There
is a great difference in logitudinal development of the fractures, which is influenced by the
factors of lithology, stratum thickness, and so on. The fractures of Cheng 6 stratum developed
best. The fractures control the permeability of reservoirs in this area, and influence well pattern
arrangement, horizontal well design, fracturing plan and water flooding management.
引文
1LorenzJC等．区域性裂缝Ⅰ：深部水平储层中区域裂缝的形成机制．油气地质译丛，1992，（1）2LorenzJC等．区域性裂缝Ⅱ：科罗拉多州皮申斯盆地中Mesaverde储集岩的裂缝作用．油气地质译丛，1992，（1）3NelsonRA天然裂缝性储层的地质分析．北京：石油工业出版社，19884安欧．构造应力场．北京：地震出版社，19925NarrW，SuppeJ．Jointspacinginsedimentaryrocks．J．Struct．Geol．，1991，13（9）6NarrW．Fracturedensityinthedeepsubsurface：TechiqueswithapplicationtopointArguelooilfield．AAPG，1990，687曾秋生．中国地壳应力分布状态．北京：地震出版社，19868宋付权译．水平井：成功与失败．世界石油工业，1995，2（10）9王鸿勋．采油工艺原理（修订本）．北京：石油工业出版社，1989
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心