西安石油大学学报（自然科学版）2024，Vol.39Issue(4)：10-19,10.DOI:10.3969/j.issn.1673-064X.2024.04.002
鄂尔多斯盆地中部罗庞塬地区长7储层控油性及有利区评价
Study on Control Factors of Oil Distribution and Favorable Areas of Chang 7 in Luopangyuan Area,Central Ordos Basin
摘要
Abstract
The characteristics of sand body thickness,lithology,storage space,and physical properties of the Chang 7 oil layers in the Luopangyuan area of the Ordos Basin were studied using data from logging,drilling,core analysis,mercury injection and oil testing.The type of oil reservoirs in the study area and the control effect of reservoir conditions on the distribution of tight oil were discussed.Favora-ble areas were evaluated.Research result shows that the average thickness of the Chang 7 sand bodies in the Luopangyuan area is 22.6 meters,and the reservoir lithology is mainly fine-grained feldspar sandstone.The storage space is mainly composed of intergranular dis-solution pores and intergranular pores,with an average porosity of 8.04％and an average permeability of 0.36 × 10-3 μm2.The study area develops small pore-fine throat,fine pore-fine throat and micro pore-micro throat reservoirs.The oil reservoir is a len-shaped tight oil reservoir,and the tight oil exhibits quasi-continuous distribution characteristics of clusters and zones.The distribution of tight oil is mainly controlled by the thickness of sand bodies,sand-to-clay ratio,porosity,permeability,and clay content of sandstone.Fine sand-stones with large sand body thickness,low shale content,and good physical properties are conducive to the enrichment of tight oil.Four Class Ⅰ and five Class Ⅱ favorable exploration areas were obtained using the comprehensive index evaluation method.关键词
致密储层/致密油/石油控制因素/长7油层组/鄂尔多斯盆地Key words
tight reservoir/tight oil/control factor of oil distribution/Chang 7 reservoir/Ordos Basin分类
能源科技引用本文复制引用
闫新智,吴伟涛,赵靖舟,周凯..鄂尔多斯盆地中部罗庞塬地区长7储层控油性及有利区评价[J].西安石油大学学报（自然科学版）,2024,39(4):10-19,10.基金项目
延长油田股份有限公司科技攻关项目"延长油田西部致密油成藏控制因素及富集规律研究"(YT11153FW0069) （YT11153FW0069）
