松辽盆地北部古龙地区葡萄花油层储层特征研究

Reservoir characteristics of Putaohua Reservoir in Gulong area in northern Songliao Basin

在系统收集和整理古龙地区葡萄花油层资料的基础上,利用大量的分析化验资料,对该区葡萄花油层储层内岩石矿物成分、物性特征和孔隙结构特征进行了详细的研究。研究表明:古龙凹陷葡萄花油层属于中、低孔-低、超低渗透性储层,岩石以长石砂岩为主,具有高结构成熟度、低成分成熟度的特点,储集空间以残余原生粒间孔为主。根据行业标准划分出四大类九小类储层,储层性质主要受粒度、填隙物、深度及沉积环境的影响。其中Ⅱ类、Ⅲ类储层为葡萄花油层有利目标优选区。

Based on systematically collecting and classifying data of Putaohua Reservoir in Gulong area, and using a large amount of analytic and experimental data, this paper studies rock mineral composition, property and pore structure of Putaohua Reservoir. Result shows that, Putaohua Reservoir in Gulong Sag is medium and low - low and uhralow permeability reservoir. Lithology is mainly feldspar sandstone, with characteristics of high textural maturity and low composition maturity. Reservoir space is mainly residual original intergrannular pore. According to industry standard, the reservoir is classified into 4 classes including 9 sub-classes. Reservoir property is affected mainly by grain size, interstitial material, depth and sedimentary environment. Class Ⅱ and Ⅲ areas are favorable target areas in Putaohua Reservoir.