中国石油大学学报（自然科学版）2017，Vol.41Issue(6)：9-19,11.DOI:10.3969/j.issn.1673-5005.2017.06.002
远源细粒辫状河三角洲沉积特征与单砂体构型分析
Sedimentary characteristics of distal fine-grain braided delta and architecture analysis of single sand body
摘要
Abstract
Based on abundant core data and close-spacing well data, this paper analyzed the single sand body architecture and constructed the sedimentary architecture model of the distal fine-grain braided delta in Laojunmiao Oilfield. The results show that the gentle slope and the long distance to the source area are the main factors which determine the development of fine-grain braided delta. The typical characteristics of distal fine-grain braided delta include small grain size ( with an average of 0. 08mm), small sedimentary structure and thin channels. The distributary channel can be divided into two types:the inter-texture-continuous channel and the intertexture divaricated channel. The intertexture-continuous channel is formed through the bifurcation and convergence of single distributary channels. The evolution of distributary channel has three modes, and there are three stages in the entire development of distributary channel, including the obvious isolated distributary channel, the intertexture channel in the manner of crevasse, and the continuous channel in a manner of inter channel erosion and later-al erosion for the early, middle and late stages, respectively. Delta front develops large area mouth bars due to the weak dis-tributary channel energy and there is minimal reconstruction in the former mouth bars. The continuous mouth bars are formed by the amalgamation and superimposition of single bars. The amalgamation patterns of mouth bars are coupled with the evolu-tion of the front delta:in the early stage, the amalgamation is characterized as weak bar edge joint. Subsequently, the amal-gamation is characterized by entire bar edge joint. In the final phase, the amalgamation is characterized as weak or entire su-perimposition.关键词
远源细粒/辫状河三角洲/沉积特征/单砂体Key words
distal fine-grain/braided delta/depositional characteristic/single sand body分类
能源科技引用本文复制引用
秦国省,吴胜和,宋新民,邹存友,郑联勇,陈诚..远源细粒辫状河三角洲沉积特征与单砂体构型分析[J].中国石油大学学报（自然科学版）,2017,41(6):9-19,11.基金项目
国家重大科技专项(2016ZX05010-005) （2016ZX05010-005）
中国石油天然气集团公司重大科技专项(2013E-3305) （2013E-3305）
