琼东南盆地崖南低凸起古近系深层优质储层发育机制  

Development mechanism of Paleogene deep high-quality reservoir in Yanan low uplift of Qiongdongnan basin

作　　者：付大巍 Fu Dawei(CNOOC China Limited,Zhanjiang Branch,Zhanjiang Guangdong 524057)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《石化技术》2023年第2期146-148,共3页Petrochemical Industry Technology

摘　　要：针对崖南低凸起中深层规模砂体与优质储层发育机制与展布的关键问题,利用钻井、地震、分析化验资料,采用构造-古地貌恢复、沉积相分析、储层微观特征分析等多种手段建立了该区崖城组源-汇体系与优质储层形成机制,并预测“甜点”储层发育区。研究结果表明:(1)崖南低凸起西侧古近系发育来自崖城凸起及西侧崖13-1低凸起西北物源大型三角洲(2)受构造活动影响,低凸起之上的三角洲砂体具有早期大范围剥蚀淋滤,晚期快速深埋的特点,溶蚀作用和砂岩粒度是储层物性的主控因素(3)崖南低凸起西侧的崖城组三角洲规模大、砂岩粒度粗、溶蚀作用强,崖26区为“甜点”储层发育区.In view of the key problems of the development mechanism and distribution of medium-deep scale sand bodies and high-quality reservoirs in the Yanan low uplift,the source-convergence system and high-quality reservoir formation mechanism of the Yacheng Formation in the area were established by using drilling,seismic,analytical and laboratory data,and by using various means such as structure-paleogeomorphic restoration,sedimentary facies analysis,and reservoir microscopic characteristics analysis,and the"dessert"reservoir development area was predicted.The research results show that:(1)the Paleogene system on the west side of the Yanan low uplift developed from the Yancheng uplift and the northwest provenance large delta on the west side of the Yanan 13-1 low uplift(2)affected by tectonic activities,the delta sand body above the low uplift has the characteristics of early large-scale denudation and leaching,late rapid burial,dissolution and sandstone grain size are the main control factors of reservoir physical properties(3)the Yancheng Formation delta on the west side of the Yanan low uplift is large in scale,coarse in grain size The dissolution is strong,and Ya26 area is the"sweet spot"reservoir development area.

关 键 词：优质储层 次生孔隙 崖城组 崖南凹陷 琼东南盆地 

分 类 号：P618.13[天文地球—矿床学]