摘要
通过岩心观察、薄片鉴定、扫描电镜、X线衍射、压汞及核磁共振分析等手段,对巴喀地区八道湾组储层孔隙特征进行研究,并结合储层的沉积相、成岩作用和构造作用对影响储层孔隙演化的因素进行分析。结果表明:研究区以主要发育剩余粒间孔和溶蚀粒内孔2种孔隙类型为特征,且孔喉半径普遍较小,孔喉分布不均匀。不同沉积相带的结构成熟度和成分成熟度存在差异,决定了储层孔隙类型的差异,从而导致储层物性的不同;强烈的压实作用和胶结物的充填是造成储层原生孔隙和次生孔隙减少的主要原因,储层易溶物质的溶解作用形成的次生溶孔则有效地改善了储层的物性。构造作用形成的裂缝成为流体运移良好的通道,提高了储层的渗流能力。
On the basis of core observation,slices arbitration,SEM observation,X-ray diffraction,mercury injection measurement methods analysis and NMR spectroscopy,the charateristics of pore on tight sandstone reservoirs in the Badaowan Formation in Baka area were researched and the controlling factors for pore evolution were analyzed according to the sedimentary facies,lithologic properties and tectonization.The results show that in this area,the main pore types are the relic primary intergranular and intragranular solution pore,the pore throat radius are relatively lesser and the distribution of pore throat is asymmetrical.The different sedimentary facies cause the different texture maturities and composition maturities of reservoir,and further result in the difference of pore types and reservoir properties.The intense compaction and cementation are the main reasons that lead to the decrease of primary and secondary porosity,and the solution develops the secondary porosity that improves the reservoir physical properties effectively.Crack is a good channel of fluid migration and improves the flow capability medium of reservoir fluid on tight sandstone reservoirs.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第11期4404-4411,共8页
Journal of Central South University:Science and Technology
基金
国家重点基础研究发展规划("973"计划)项目(2009CB219604)
