普光气田层序地层格架与储层发育特征  

Sequence stratigraphic framework and reservoir developmental features of Puguang Gas Field

作　　者：毛立华[1,2,3] 钟建华[4] 李卫兵[3] 王志宝[3] 崔秀敏[3] 傅良佳[5] 

机构地区：[1]中国科学院广州地球化学研究所,广东广州510640 [2]中国科学院研究生院,北京100039 [3]中原油田分公司勘探开发科学研究院,河南濮阳457001 [4]中国石油大学地球资源与信息学院,山东东营257061 [5]中原油田分公司采油五厂,河南濮阳457001

出　　处：《断块油气田》2010年第3期312-315,共4页Fault-Block Oil & Gas Field

摘　　要：综合利用露头、岩心、测井和地震资料,对川东断褶带普光气田飞仙关组、长兴组储层进行了高频层序分析、沉积相预测和有利储集带预测。将长兴组划分为2个三级层序、6个四级层序和10个五级层序;飞仙关组划分为2个三级层序、8个四级层序和19个五级层序。在三级层序的层面上,论述了层序特征,进行了沉积相预测;该区储集空间主要为溶蚀孔隙,储层发育具有明显相控性,高能环境下的颗粒灰岩经白云化形成的孔隙远高于低能环境下地层的孔隙;鲕滩和生物礁基本上都经历了较好的暴露和溶蚀,一般孔隙发育较好;斜坡、陆棚、泻湖及潮坪多发育高放射性的泥岩,孔隙不发育。Comprehensively using the data of outcrops,cores,well log and seismics,this paper analyzes the high-frequency sequence of Feixianguan Formation and Changxing Formation reservoirs on the fault-fold belt of Puguang Gas Field in eastern Sichuan.The sedimentary facies and favorable reservoir are predicted.Changxing Formation is divided into two third-order sequences,six fourth-order sequences and ten fifth-order sequences.Feixianguan Formation is divided into two third-order sequences,eight fourth-order sequences and nineteen fifth-order sequences.In third-order sequence level,the sequence characteristics are discussed and the sedimentary facies are predicted.The pore space of this area is primarily corrosion pores and the reservoir development has obvious phase-controlled features.The porosity of granular limestone generated by dolomitization in high-energy environment is much higher than that one generated in low-energy environment.Oolitic beach and reef basically go through better exposure and corrosion with well-developed porosity and the highly radioactive mudstone appears on the slope,shelf,lagoon and tidal flat,where the pores are not developed.

关 键 词：层序特征 沉积相 有利储集带 普光气田 

分 类 号：TE121.3[石油与天然气工程—油气勘探]