葡萄花油田泥质粉砂岩储层的特征

Muddy siltstone reservoir characters in Putaohua oil field

针对葡萄花油田水下窄小分流河道砂体发育窄小、连续性差、分布零散、砂体间发育有大量泥质粉砂岩的实际状况,研究了泥质粉砂岩储层的岩性、物性及含油性等特征及产液、吸水状况.结果表明:该储层具有颗粒细、泥质质量分数高、含油饱和度低的特点;主要呈砂体边部型、相对连片型和独立型分布.该泥质粉砂岩储层产液能力较低,但吸水状况较好,可以利用泥质粉砂岩储层为连接纽带来改善砂体间的连通状况,以完善单砂体注采关系.

The paper is about the fact that the sandstones is narrow and small,with low continuity and scattered distribution and that there are plenty of muddy siltstones between sandstones in poky underwater distributary channel.The lithology,physical property,oil bearing property are dealt with in a detailed way.The reservoir has a character that the grain is small,have a high rate of muddy and low oil bearing saturation.The sandstones mainly distributed in styles of edged,relatively curved faces or individuals.After the analysis of the liquid production and the injected-water of muddy siltstone reservoir by statistic,we came a result that the liquid production rate is low while the water-injection rate looks well in this muddy siltstone reservoir.In order to perfect the relationship between the injection and the production of a single sandstone,the muddy siltstone reservoir can be looked as a connecting tie for improving the connection between sandstones.