南泥湾长6油层组沉积微相及含油性研究  

A study on sedimentary microfacies and oil-bearing possibility in Chang 6 oil-bearing formation in the area of Nanniwan

作　　者：胡春花[1] 屈红军[1] 苗建宇[1] 王武龙[1] 马强[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,陕西西安710069

出　　处：《西北大学学报（自然科学版）》2008年第6期994-1000,共7页Journal of Northwest University（Natural Science Edition）

基　　金：国家重点基础研究发展计划基金资助项目(2003CB214602)

摘　　要：目的研究南泥湾地区长6油层组沉积微相,认识沉积微相与油气富集规律的关系。方法通过岩心观察、薄片观察、扫描电镜、粒度分析,结合钻井、测井资料,对南泥湾油田长6油层组岩性特征、沉积相特征及沉积微相含油性进行统计分析。结果该区长6为三角洲前缘亚相沉积,包括水下分流河道、河口砂坝、水下分流间湾、前缘席状砂、水下天然堤和水下决口扇等6种沉积微相,其平面展布由北向南呈鸟足状。结论水下分流河道微相是该区长6油层组含油砂体的骨架相,水下分流河道砂体是该区今后勘探的主要目标。Aim To study the sedimentary microfacies of tionship between sedimentary microfacies and oil-bearing Chang 6 oil-bearing formation and understand the relapossibility in the area of Nanniwan. Methods The lithological, sedimentary facies characteristics and oil-gas distribution are studied based on a series of work and data including observing and accounting of cores and crop sections, analysis of scanning electron microscope, grain size analysis, and data of well drilling and well logging. Results In Chang 6 period, the sedimentary faceies of Nanniwan area was delta front subfacies that included six types of sedimentary microfacies, and it extended to SW from NE in bird-foot delta. Conclusion Underwater channel mierofacies was the dominant sedimentary microfacies of oil sand bodies of Chang 6 oil-bearing formation in the study area, and underwater channel sand bodies should be the main destinations of exploration of this area in the near future.

关 键 词：南泥湾地区 长6油层组 沉积微相 含油砂体 

分 类 号：TE122.2[石油与天然气工程—油气勘探]