成都理工大学学报（自然科学版）Issue(1)：24-34,11.DOI:10.3969/j.issn.1671-9727.2016.01.02
松辽盆地北部肇州区块沙河子组致密储层主控因素
Characteristics and controlling factors of tight reservoir in Shahezi Formation of Zhaozhou,North Songliao Basin,China
摘要
Abstract
The study of statistical analysis of reservoir physical property,thin sections,SEM and mercury injection experiment data of Shahezi Formation in Zhaozhou area reveals that the reservoir of Shahezi Formation of Lower Cretaceous is a tight sandstone one,with lithic feldspar sandstone and feldspathic lithic sandstone as main lithology,and with pore-type calcareous cement and clay as main fillings.The types of reservoir space are characterized by minor primary pores,abundant secondary pores,visible cracks and occasionally intergranular holes.Pore-throat structure is characterized by micropore and microthroat, which restrained the improvement of reservoir physical property. Measured reservoir physical property indicates that it is a typical super tight reservoir.Comparing gas bearing layer with dry layer through frequency distribution function method, the lower limits parameters of effective reservoir can be determined.It shows that the limit of its porosity is 3.5% and the limit of its permeability is 0.053 ×10 -3 μm2 .Distribution of effective reservoir is controlled by sedimentary environment, diagenesis and tectonic activity. Its main controlling factors can be summarized as follows:deposition is the main controlling factor;compaction is the dominant factor;cementation makes the reservoir more compact,corrosion increases the pores,and cracks improve the permeability.Compaction and cementation reduce reservoir physical properties and tectonic activity improves the permeability of reservoir by creating cracks.In the vertical,SQ3 occurs in the secondary porosity zone of the reservoir and is the main favorable reservoir,and the SQ2 takes the second place. In the plane,the fan delta front subfacies in the west is the most favorable reservoir development area,braided river delta front subfacies in the east takes the second place.关键词
致密储层/物性下限/主控因素/沙河子组/肇州区块Key words
tight reservoir/petrophysical parameter cutoff/main controlling factor/Shahezi Formation/Zhaozhou area分类
能源科技引用本文复制引用
蔡来星,卢双舫,王蛟,黄爱华,魏然..松辽盆地北部肇州区块沙河子组致密储层主控因素[J].成都理工大学学报（自然科学版）,2016,(1):24-34,11.基金项目
国家自然科学基金资助项目（41172134）；中国石化科技项目（P14068）；教育部自主创新基金项目（15CX05046A，15CX07004A ）；国家重大科技专项（2011ZX05007-001）。 （）
