沧东—南皮凹陷舍女寺地区孔店组二段沉积相研究

发布时间：2018-05-29 04:55

本文选题：舍女寺地区 + 孔店组二段　；参考：《成都理工大学》2015年硕士论文

【摘要】：舍女寺地区位于渤海湾盆沧东凹陷和南皮凹陷的连接部位,西边为沧县隆起,东边与孔店构造带以鞍部形态相连接,西、东分别被沧东断层及徐西断层所夹,是以孔店组为主要生油岩和储集层的复式油气聚集区,孔店组二段为主要勘探地层。该地区勘探程度比较低,石油和天然气资源探明程度不高,沉积相是关键制约因素之一,尚待深入研究。基于上述原因,选择沧东-南皮凹陷舍女寺地区作为研究区域,以孔店组二段为研究层位,应用地震地层学、层序地层学、沉积学等理论进一步系统研究其沉积相特征,揭示其沉积体系空间展布规律,并总结研究区整个孔店组二段的沉积演化。(1)以层序地层学为理论指导,结合地震,测井和岩性资料的综合解释对舍女寺地区孔店组二段区域层序界面进行了识别,建立该区区域层序地层格架。最终将孔店组二段分出2个三级层序,2个三级层序分别为孔店组二段下部、孔店组二段上部。孔店组下部对应于孔店组二段3、4油层组,孔店组二段上部对应于孔店组二段1、2油层组。(2)通过对舍女寺地区孔店组二段的岩性相、岩性相组合类型和测井相研究,结合区域地质背景资料,证明该区孔店组二段发育有辫状河三角洲相、湖泊相、远岸水下扇相。(3)结合区域地质背景,通过对沧东-南皮凹陷舍女寺地区孔店组二段主干剖面沉积相联井分析,结合地震属性平面展布特征、砂岩百分含量等数据,对舍女寺地区孔店组二段地层进行砂体平面展布分析,最后得出舍女寺地区孔店组二段各油层组的沉积相平面展布图,为该区油气勘探奠定基础。(4)通过对舍女寺地区孔店组二段各油层组沉积微相平面展布进行比对和归纳,最后得出研究区整个孔店组二段的沉积演化特征。
[Abstract]:The Shenusi area is located at the junction of Cangdong Sag and Nanpi Sag in the Bohai Bay basin, Cangxian uplift in the west, Anchorage shape in the east and Gongdian structural belt in the east, and the west and east in the Cangdong fault and Xuxi fault respectively. It is a compound oil and gas accumulation area with the Kongdian formation as the main source rock and reservoir, and the second member of the Kongdian formation as the main exploration stratum. The exploration level in this area is relatively low and the oil and gas resources are not well proved. Sedimentary facies are one of the key factors which need to be further studied. Based on the above reasons, the Shenusi area of Cangdong-Nanpi depression is selected as the study area, the second member of the Kongdian formation is taken as the study horizon, and the sedimentary facies characteristics are further systematically studied by using the theories of seismic stratigraphy, sequence stratigraphy and sedimentology. The spatial distribution of the sedimentary system is revealed, and the sedimentary evolution of the second member of the Kongdian formation in the study area is summarized. The sedimentary evolution is guided by sequence stratigraphy and combined with earthquakes. The regional sequence interface of the second member of the Kongdian formation in the Shenusi area was identified and the regional sequence stratigraphic framework was established by comprehensive interpretation of the logging and lithologic data. Finally, the second member of the Kongdian formation is divided into two third-order sequences, two third-order sequences are the lower part of the second member of the Kongdian formation and the upper part of the second member of the Kongdian formation. The lower part of the Kongdian formation corresponds to the 3Q4 reservoir formation of the second member of the Kongdian formation, and the upper part of the second member of the Kongdian formation corresponds to that of the second member of the second stage of the Kongdian formation. (2) the lithologic facies, lithologic combination types and logging facies of the second member of the Kongdian formation in the Shennusi area are studied. Combined with regional geological background data, it is proved that there are braided river delta facies, lacustrine facies, far shore underwater fan facies and regional geological background in the second member of Kongdian formation in this area. Based on the analysis of sedimentary association wells in the main section of the second member of the Kongdian formation in the Shenuesi area, Cangdong to Nanpi depression, combined with the plane distribution characteristics of seismic attributes and the sandstone percent content data, The horizontal distribution of sand bodies in the second member of the Kongdian formation in the Shenusi area is analyzed. Finally, the planar distribution of sedimentary facies of the second member of the Kongdian formation in the Shennusi area is obtained. By comparing and summarizing the distribution of sedimentary microfacies in the second member of Kongdian formation in Shenusi area, the sedimentary evolution characteristics of the second member of Kongdian formation in the study area are obtained.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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