海洋地质与第四纪地质2017，Vol.37Issue(6)：197-203,7.DOI:10.16562/j.cnki.0256-1492.2017.06.021
古地貌对重力流沉积控制作用及与天然气成藏的关系——以莺歌海盆地中新统为例
PALAEOGEOMORPHOLOGIC CONTROL ON GRAVITY FLOW DEPOSITS AND GAS RESERVOIR FORMATION: A CASE STUDY FROM THE MIOCENE IN YINGGEHAI BASIN
摘要
Abstract
For the purpose to identify the next exploration target which has remained unclear so far in the central depression of the Yinggehai Basin,and based on the principles of reservoir formation and gas accumulation,this paper studies the palaeogeomorphologic patterns and their control over gravity flow deposition and gas reservoir formation.Results show that the increases in slope and water depth near the flexure slope break is the key condition for submarine fan to form,and the limited grooves and valleys determine the injection mouth and the direction of sediment movement,and the subsiding centers formed by the uneven subsidence controls the unloading area for submarine fan deposits.Gravity flow sediments are always deposited under the slope break in the LST,and,therefore,disconnected to the deltaic deposits near the slope break.It is easy to form a good reservoir-cap association with overlying shallow sea mud deposit formed in the TST-HST as covers.It is favorable for the formation of effective trap.Since the paleo-depocenter migrated from north to south,the northern Dongfang region is precocious and matured.However,the organic matter in the Ledong region is matured late but rapid.Based on the above research,this paper points out that the central depression of the Yinggehai Basin is a favorable area for next cycle of exploration.关键词
古地貌/重力流/沉降中心/高温超压/莺歌海盆地Key words
palaeogeomorphology/gravity flow deposits/subsidence center/high temperature and high pressure/Yinggehai basin分类
天文与地球科学引用本文复制引用
刘为,裴健翔,于俊峰,范彩伟,张秀苹,邵远..古地貌对重力流沉积控制作用及与天然气成藏的关系——以莺歌海盆地中新统为例[J].海洋地质与第四纪地质,2017,37(6):197-203,7.基金项目
国家科技重大专项莺琼盆地高温高压天然气富集规律与勘探开发关键技术(三期)(2016ZX05024-005) （三期）
