致密油储层含油性主控因素及分布特征——以鄂尔多斯盆地红河油田36井区长8油层组为例  

Main controlling factors and distribution characteristics of oil-bearing property of tight oil reservoirs:taking Chang 8 oil layers in 36 well area of Honghe Oilfield in Ordos Basin as an example

作　　者：郭秀娟[1] 王建宁[2] 伍岳 邹敏[1] 王静[1] 何苗 GUO Xiujuan;WANG Jianning;WU Yue;ZOU Min;WANG Jing;HE Miao(Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 100083,China;International Petroleum Exploration and Production Corporation,SINOPEC,Beijing 100029,China;Shanghai Branch of CNOOC Ltd.,Shanghai 200335,China)

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石化国际石油勘探开发有限公司,北京100029 [3]中海石油(中国)有限公司上海分公司,上海200335

出　　处：《断块油气田》2024年第1期69-76,共8页Fault-Block Oil & Gas Field

摘　　要：鄂尔多斯盆地红河油田地质条件复杂,含油非均质性极强,导致水平井产能差异及开发难度大。文中基于钻、测、录井及岩心测试、生产动态等资料,对红河油田36井区长8油层组含油性主控因素及含油饱和度分布特征开展了研究。结果表明:1)红河油田由于油气充注强度整体较低,呈现“大面积含油、局部富集”的特点。2)断裂与储层物性是控制含油性的2个主要因素,不同尺度断裂及其伴(派)生裂缝带的含油性差异大。其中:中尺度断裂及其伴(派)生裂缝带既是良好的源-储输导体系,也能改善储层物性,是主要的油气富集带(区);裂缝带以外的基质区主要受储层物性影响,在优质储层发育部位,可发育形成次油气富集区。3)研究区存在断-缝输导成藏和源-储接触成藏2种油气成藏模式,由此建立了长8油层组致密油藏含油性差异成因模式,明确了高含油饱和度区呈“裂缝带内条带状分布、裂缝带以外沿优质储层片状分布”的特征,“雁列式中尺度断裂+优质储层”部位为有利的开发目标区。The geological conditions of Honghe Oilfield in Ordos Basin are complex,and the oil-bearing heterogeneity is very strong,which leads to the large difference in production capacity and great development difficulties of horizontal wells.Based on tha data of drilling,logging,mud-logging,core analysis,and production dynamic,the study of main controlling factors and distribution characteristics of oil saturation of Chang 8 oil layers are carried out in Honghe 36 well area.The results show that:(1)Because of lower oil-gas charging strength,Honghe Oilfield is characterized by"oil-bearing in large area and enriching in local".(2)The faults and reservoir physical properties are two key factors controlling oil-bearing property.The oil-bearing property of different-scale faults and their associated(derived)fracture zones varies greatly.The medium-scale faults and their associated(derived)fracture zones are not only good source-reservoir transportation system,but also improve physical properties of the reservoir,so they are the main oil-gas enrichment areas.The matrix area outside the fracture zone is mainly affected by the physical properties of the reservoir,and sub-enrichment area can be formed in the developing part of the high-quality reservoir.(3)There are two types of oil-gas accumulation models developed in the study area,including fault-fracture conductivity accumulation and source-reservoir contact accumulation.Thus,the genetic model of oil-bearing difference in tight oil reservoirs of Chang 8 oil layers is established.It is made clear that the high oil saturation area shows the characteristics of"banded distri-bution in the fracture zone and sheet-like distribution along the high-quality reservoir outside the fracture zone",and the"en echelon medium-scale fault and high-quality reservoir"locations are favorable development target areas.

关 键 词：致密油藏 含油性 主控因素 红河油田 鄂尔多斯盆地 

分 类 号：TE122.24[石油与天然气工程—油气勘探]