鄂尔多斯盆地郝滩新区延8~延10沉积特征与储层非均质性研究  

Research on sedimentary characteristics and reservoir heterogeneity of Yan 8~Yan 10,Haotan new area,Ordos Basin

作　　者：王家豪 刘景元 杨丽萍 WANG Jiahao;LIU Jingyuan;YANG Liping(School of Geoscience and Engineering,Xi'an Shiyou University,Xi'an Shaanxi 710065,China;Shaanxi Provincial Key Laboratory of Oil and Gas Formation and Reservoir Geology,Xi'an Shaanxi 710065,China;Training Center,PetroChina Changqing Oilfield Company,Xi'an Shaanxi 710018,China)

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]陕西省油气成藏地质学重点实验室,陕西西安710065 [3]中国石油长庆油田分公司培训中心,陕西西安710018

出　　处：《石油化工应用》2025年第1期68-74,共7页Petrochemical Industry Application

摘　　要：在勘探历程已愈百年的鄂尔多斯盆地,仍有尚未认识全面的地区。郝滩新区是近年来开发的新区块,盆地区域内的延安组地层在新区未能得到全面的认识,这制约了地区油气勘探开发的脚步。在前人研究的基础上,本文从沉积演化和对储层控制因素方面出发,研究了郝滩新区沉积演化特征,延10属于辫状河沉积,发现延10+富县期具有辫状河沉积特征;延9~延8受水动力影响较大,发育三角洲平原亚相沉积环境,发育分流河道以及分流间洼地微相。在延10时期主要微相有河漫滩、边滩及河道滞流沉积三种。另外,分析研究了沉积环境对于储层发育的影响,沉积环境、成岩作用、胶结压实等起到对储层孔隙发育的作用,溶蚀作用可改善储集空间以及影响储层非均质性。为下一步勘探和开发提供预测和建议。In the Ordos Basin,which has been explored for more than 100 years,there are still areas that have not been fully recognised.Haotan new area is a new block developed in recent years,and the Yan'an formation in the basin has not been fully recognised in the new area,which restricts the footsteps of oil and gas exploration and development in the area.On the basis of previous research,this paper from the sedimentary evolution and reservoir control factors,the study of the Haotan new area sedimentary evolution characteristics,Yan 10 belongs to the braided river deposition,found that the Yan 10+Fuxian period has the characteristics of the braided river deposition.Yan 9~Yan 8 by the hydrodynamic influence of the development of the deltaic plains of the subphase of the sedimentary environment,the development of the submerged diversion of the river channel as well as the diversion of inter-relief depressions of microphase.In the period of Yan 10,the main microphases are rambling beach,side beach and channel stagnation deposition.In addition,the influence of depositional environment on reservoir development is analysed and studied,and the effects of depositional environment,diagenesis,cementation and compaction play a role in the development of reservoir pores,and the dissolution effect can improve the reservoir space as well as affect the heterogeneity of the reservoir.Predictions and suggestions are provided for the next step of exploration and development.

关 键 词：延安组 沉积演化 非均质性 储层 

分 类 号：TE121.3[石油与天然气工程—油气勘探]