摘要
利用薄片鉴定、扫描电镜、压汞实验及物性分析等资料,系统研究了马岭油田北三区延1021储层特征及其控制因素。结果表明,研究区延1021储集层以成分成熟度、结构成熟度中等或偏低的岩屑长石砂岩及长石石英砂岩为主,为典型的低孔、低渗储层;储层内部构型以泥质夹层为主。储集空间以粒间孔为主,孔隙结构微观非均质性强,较大喉道控制储层渗流能力。沉积相带的差异导致储层物性的差异,并影响成岩作用的类型和强度。压实、胶结作用是储层致密的主导因素,溶蚀作用在改善储集空间的同时,还增强了孔喉连通性。微观孔隙结构可有效反映储层品质特征。
Based on data from thin sections,scanning electron microscope and mercury injection tests and physical property analysis,this work made a systematic study on characteristics and controlling factors of Yan 1012 reservoirs in the northern Maling oilfield of Shanxi Province. The results demonstrate that the reservoir sandstone is mainly composed of lithic feldspathic sandstones and feldspathic lithic sandstones which have the characteristics of high compositional maturity and medium or low texture maturity,and belongs to a low-porosity and low-permeability type. The main internal architecture is muddy intercalation and the main reservoir space is dominated by intergranular holes with highly heterogeneous microscopic pore structure. Major throats are the crucial factor for reservoir infiltrating ability. Different sedimentary facies zones resulted in the differences of physical properties and determined types and intensity of the late diagenesis. The strong compaction and cementation played a key role in forming low-porosity and low-permeability reservoirs. As constructive diagenesis,dissolution of feldspar and cuttings caused by the acidic water not only improved the reservoir space greatly,but also enhanced the pore connectivity. Microscopic pore structure can effectively reflect reservoir quality.
出处
《地质与勘探》
CAS
CSCD
北大核心
2015年第2期395-404,共10页
Geology and Exploration
基金
国家科技重大专项大型油气田及煤层气开发(2011ZX05044)资助
关键词
马岭油田北三区
延1021储层特征
物性控制因素
成岩作用
孔隙结构
northern Maling oilfield,Yan 1012reservoir characteristics,controlling factors on physical property,diagenesis,pore structure
