陆东凹陷清河地区九佛堂组沉积特征及其对储层的影响  

Sedimentation Characteristics of Jiufotang Formation in Qinghe Area of Ludong Sag and Its Effect on Reservoirs

作　　者：鲍丹丹[1] 刘邦 Bao Dandan;Liu Bang(Petroleum Exploration and Development Research Institute,PrtroChina Liaohe Oilfield Company,Panjin Liaoning 124010)

机构地区：[1]中国石油辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《中外能源》2024年第12期34-40,共7页Sino-Global Energy

基　　金：中国石油天然气股份有限公司重大科技专项“辽河探区可持续规模增储勘探关键技术研究”(编号:2017E-1601)的资助。

摘　　要：为了进一步明确陆东凹陷清河地区九佛堂组沉积相的发育特征、展布规律及其对储层的影响作用,在已有钻井、测井、录井、地震以及分析化验资料的基础上,结合前人研究成果,通过古地貌恢复研究、沉积砂体的岩石类型、井震结合砂地比研究以及沉积相类型分析,对清河地区沉积特征开展细致研究。研究结果表明:九佛堂组沉积时期,清河地区主要发育扇三角洲和辫状河三角洲沉积,多套砂体在垂向上叠置发育,对储层的发育产生不同的影响。通过完钻井单井以及典型连井剖面的地层厚度分析,认为九佛堂时期的古地貌和古构造对沉积砂体的平面展布起主要的控制作用。九佛堂组主要的油气产层为九上段Ⅳ油组和九下段,针对清河地区主要油气产层开展储层特征研究,发现扇三角洲和辫状河三角洲沉积相带控制储层的发育程度。研究成果有利地指导了清河地区的勘探部署。To further clarify the development characteristics,distribution rules of the sedimentary facies of the Jiufotang Formation and its effect on the reservoirs in the Qinghe area of Ludong Sag,the sedimentary characteristics of the Qinghe area are studied in detail after the study of paleo-geomorphic restoration,rock types of sedimentary sand bodies,the sandstone and stratum thickness ratio by well-seismic combination,and analysis of sedimentary facies types based on the existing drilling,logging,mud logging,seismic and analytical test data,and the previous research results.The results show that the fan delta and braided river delta were mainly developed in the Qinghe area during the deposition of the Jiufotang Formation,and multiple sets of sand bodies were superimposed vertically,which had different effects on the development of the reservoirs.The analysis of the formation thickness of the completed single well and typical well section indicates that the paleogeomorphology and paleo-structure in the Jiufotang period played a major role in controlling the planar distribution of sedimentary sand bodies.The main oil and gas pay zones of the Jiufotang Formation are the Ⅳ-oil group of the upper member and lower member of the Jiufotang Formation.Reservoir characteristics of the major oil and gas pay zones in the Qinghe area are studied.It is found that the fan delta and braided river delta sedimentary facies belt control reservoir development.The research results have provided favorable guidance for the exploration deployment in Qinghe area.

关 键 词：清河地区 沉积砂体 展布规律 储层特征 勘探部署 

分 类 号：P618.13[天文地球—矿床学]