甘谷驿油田延长组长6油层沉积特征

Depositional feature of Chang 6 Oil-bearing bed of Yanchang Formation in west Ganguyi Oilfield,north of Shaanxi

目的 了解长6储层的沉积特征,储层的分布规律。方法 在岩心观察的基础上,研究长6油层的岩性、结构、构造特征,结合测井相资料,研究沉积相。结果 长6油层沉积为湖泊三角洲前缘及三角洲平原沉积。结论 储集砂体为三角洲平原及前缘的分流河道沉积,储层分布受沉积特征控制。

Aim In order to find out depositional feature and distribution law.Methods Based on the observation of core,it is easy to analyze the characteristics of lithology,texture and structure of Chang 6 Oil-bearing bed.Combined with the well-log facies,the sedimentary facies of Chang 6 would be made sure.Results Facies of Chang 6 Oil-bearing bed are delta front and delta plain.Conclusion Sand bodies of Chang 6 Oil-bearing bed are mainly distributary channel deposits of lake delta front facies and delta plain facies,the characteristics of deposition controls distribution of reservoir bed.