牛庄洼陷东坡沙四段沉积相及油气成藏特征

Sedimentary face and reservoir characteristics of ES4 in the east slope of Niuzhuang Sag

王利

Wang Li

中国石化胜利油田有限公司现河采油厂, 山东东营 257068

Xianhe Oil Production Plant of Shengli Oilfield Limited Corporation, SINOPEC, Dongying 257068, China

牛庄洼陷东坡沙四段是2004年以来发现的一套新的含油层系。根据岩性、粒度分析、沉积构造等特点,其沉积相为来自南部物源的远岸浊积扇沉积,中扇的辫状水道微相是主要的含油微相。沙四段油气成藏特征为中高压、中等渗透、低阻油层岩性油藏或构造岩性油藏,储层横向变化控制成藏,砂体厚度大、物性好、油气富集。

The forth segment of Shahejie formation （ES4） is a new oil-bearing series found in the east slope of Niuzhuang Sag since 2004. The sedimentary face was determined by turbidite fan of remote origin through study of lithology, grading analysis and sedimentary structure, etc. South area of Niuzhuang Sag is the material origin area of the fan, and braid channel microface of middle fan is the main oil-bearing microface. ES4 reservoir in Niuzhuang belongs to lithology or structure-lithology reservoir with middle to high pressure, middle permeability, and low resistance. The sand body of reservoir is thick, and physical characters are advantageous.