摘要
对松辽盆地南部扶余油田和新立油田扶余油层砂岩岩石学特征和各成岩作用类型进行了细致分析,研究表明,扶余油田和新立油田的扶余油层主要类型分别为长石砂岩和长石岩屑砂岩,并经历了中等压实作用、自生石英胶结作用、自生粘土矿物胶结作用、碳酸盐胶结作用、交代和溶解作用等,达到晚成岩阶段A2亚期。该油层砂岩中碳酸盐胶结物主要为成岩早期的产物,当碳酸盐胶结物含量大于8%时,直接影响岩石的机械压实作用和油层的孔隙度。扶余油田扶余油层砂岩中长石含量相比新立油田高,可能导致该地区扶余油层砂岩的交代和溶解作用相对发育,从而抑制其内石英颗粒的次生加大,并形成高含量的自生高岭石,及因长石溶解所至的两个自生高岭石峰值特征等。
Comparison of the lithology and especially the diagenesis for the Fuyu reservoir sandstones （F.R.S.） in the Fuyu and Xinli oilfields, located in the south of Songliao Basin, it indicates that the F.R.S. in the Fuyu and Xinli oilfields are mainly composed of arkose, feldspathic litharenite and besides, and underwent a series of diagenesis such as the middle compaction, the cementation of quartz, clay mineral and carbonate, the metasomasis, and the dissolution in the diagenesis A2 period. The carbonate cement of the F.R.S. in Fuyu and Xinli oilfields was mainly formed during the early diagenesis and affected the compaction and porosity of the reservoir dramatically when its content is more than 8%. The content of the easy-dissolve feldspar in the F.R.S. in Fuyu area is higher than in Xinli, probably leading to the metasomasis and dissolution in the Fuyu reservoi a developing more remarkable in Fuyu, result in less quartz overgrowth, authigenic kaolinite due to the dissolution in feldspar. high content of authigenic kaolinite, and two wave-crests of authigenic kaolinite due to the dissolution in feldspar.
出处
《地质调查与研究》
2007年第1期27-32,共6页
Geological Survey and Research
基金
吉林油田松南扶余油层资料处理及目标预测
