摘要
采用岩心、测井等具有相关性的基层资料和生产历史性的数据作为探究的重要途径,对长油田长6油层组沉积相、储层特征进行深入性的研究,并根据研究结果对油水层分布规律、控制因素进行全面性的分析,经分析发现该区长6油藏属于三角洲前缘沉积-三角洲平原过度,水下分流河道发育情况良好,北物源整体的分布情况为西南方向,平均孔隙度8.74%,平均渗透率1.33mD。沉积相、储层物性,盖层遮挡条件属于对油藏良好控制的主要因素。其中最关键的因素就是与烃源岩中心距离较远,油源供给量不够充足,严重降低了该区域的含油饱和度,在重力作用小,油水分异显著,通过测井曲线能够将砂层上部的电阻率情况直接反映出来,含油性好,下部电阻率低,属于高含水层。
The sedimentary facies and reservoir characteristics of Chang-6 reservoir group in Chang Oilfield are deeply studied by using core,logging and other relevant grass-roots data and historical production data.According to the research results,the distribution law and controlling factors of oil-water layer are comprehensively analyzed.It is found that Chang-6 reservoir belongs to delta front sedimentation-delta plain transition,and the underwater distributary channel develops well.The whole distribution of the north provenance is southwest,with an average porosity of 8.74%Sedimentary facies,reservoir physical properties and capping conditions are the main factors for good control of reservoirs.The most critical factor is that the distance from the center of source rock is far away,and the supply of oil source is not enough,which seriously reduces the oil saturation in this area.The gravity effect is small,and the oil and water are different significantly.The resistivity of the upper part of the sand layer can be directly reflected by logging curves,which shows that the oil content is good,and the resistivity of the lower part is low,which belongs to high aquifer.
作者
许红涛
Xu Hongtao(Xi’an Shiyou University,Shaanxi,Xi’an 710065,China)
出处
《云南化工》
CAS
2021年第1期136-138,共3页
Yunnan Chemical Technology
关键词
鄂尔多斯
油田
长6段
油气
富集规律
Ordos
Oilfields
Long 6 Segments
Oil and Gas
Enrichment Law
