油泉子油田混相成岩作用及其对储层物性的影响  

Study on miscible diagenesis and its impact on reservoir property in Youquanzi oilfield

作　　者：欧成华[1] 高彬[1] 才叶[2] 邓钧耀[1] 高智[1] 

机构地区：[1]西南石油大学,四川成都610500 [2]中油辽河油田公司,辽宁盘锦124010

出　　处：《特种油气藏》2010年第4期39-42,共4页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金(50874096)

摘　　要：综合X射线衍射、普通薄片、铸体薄片、扫描电镜、阴极射线等多种资料,对油泉子地区油砂山组的成岩作用和储层物性进行了研究。结果表明:该区储层主要为粉砂岩(泥质粉砂岩)、颗粒灰岩和泥灰岩。压实和胶结作用是造成储层孔隙丧失的主要原因,尤其是碳酸盐胶结,其次是黏土矿物胶结。其中,绿泥石胶结物的存在抑制了胶结作用的进一步进行,有利于粒间孔的保存;而褶皱回返阶段的溶蚀作用,方解石和盐岩的溶解,极大地改善了储层物性。储层处于早成岩后期阶段,溶蚀型次生孔隙为主要孔隙类型。This paper studies the diagenesis and reservoir properties of the Youshashan formation in Youquanzi region by using data of X-ray diffraction,ordinary thin section,casting thin section,scanning electron microscopy and cathode-ray.The result shows that the reservoirs in this area mainly contain siltstone(pelitic siltstone),grain limestone and marl.Compaction and cementation are the main reasons for reservoir porosity loss,especially carbonate cementation,followed by clay cementation;the presence of chlorite cement inhibits further cementation and is helpful to the preservation of intergranular pores;while the reservoir properties are greatly improved by the denudation during fold turn-back period and the dissolution of calcite and salt rock.The reservoir is in the late stage of early diagenesis,with dissolution porosity as the main pore type.

关 键 词：油砂山组 混相成岩 储层物性 成岩作用 油泉子油田 柴达木盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]