CAJ | 학술논문

丰富川油田西部探区为多层系低渗透复合含油区，储层沉积类型复杂多样，沉积演化在很大程度上控制着油藏的富集。利用钻井、岩心、测井、生产动态等资料，深入分析了该区主要含油层系延长组长2、长4+5、长6沉积相标志、物源方向、沉积构造等特征，建立了多期沉积序列体系，并进行沉积演化特征分析。研究结果表明，延长组主要发育为三角洲沉积体系；沉积物主要通过分流河道由北东向南西输入湖盆，不同时期发育的河道展布继承性较好，充分阐明了该区延长组主要含油层段的沉积规模与沉积演化特征；在同一小层内部，河道展布的继承性较好，且组成的良好储盖组合，为油田下步勘探与寻找油藏富集有利区提供可靠保障。
봉부천유전서부탐구위다층계저삼투복합함유구，저층침적류형복잡다양，침적연화재흔대정도상공제착유장적부집。이용찬정、암심、측정、생산동태등자료，심입분석료해구주요함유층계연장조장2、장4+5、장6침적상표지、물원방향、침적구조등특정，건립료다기침적서렬체계，병진행침적연화특정분석。연구결과표명，연장조주요발육위삼각주침적체계；침적물주요통과분류하도유북동향남서수입호분，불동시기발육적하도전포계승성교호，충분천명료해구연장조주요함유층단적침적규모여침적연화특정；재동일소층내부，하도전포적계승성교호，차조성적량호저개조합，위유전하보감탐여심조유장부집유리구제공가고보장。
The western exploratory area of Fengfuchuan Oilfield is a composite petroliferous re-gion of multilayer and low permeability.The reservoir sedimentary is complicated.The sedimen-tary and evolution control the reservoir enrichment in a large part.This paper deeply analyzed the sedimentary facies,provenance and the sedimentary structure of Chang 2,Chang 4+5 and Chang 6 in the main oil-bearing series of Yanchang formation,then multiphase system of sedimentary succession was established and sedimentary evolution was analyzed.The results indicated that Yanchang formation mainly developed delta sedimentary system;sediments were imported into Basin from northeast to southwest through distributary channel and channel distribution in differ-ent period of the development had a good inheritance which fully illustrated the deposit scale and characteristics of sedimentary evolution of Yanchang formation in the main oil-bearing segment;better inheritance of the channel distribution and a good reservoir cap assemblage in the same lay-er will provide reliable support for the next exploration of favorable reservoir enrichment zone.