摘要
介绍了莺—琼盆地几种主要储层类型的特征及分布，包括：近源、远源、低位三角洲，浊积扇，浊积水道，海滩，水下高地浅滩，风暴席状砂和潮流砂脊等。通过对相对海平面变化及层序分析，确定了本区的旋回系统，认为本区第三纪经历了３次较大的海平面下降过程，盆地的沉积、沉降中心也有过几次较大的迁移，为在盆地中发育储层及储盖组合创造了有利的条件，分别对应于Ｓ４０、Ｓ６０和Ｓ７０层序界面，这些层位应是储层比较发育的层段。还分析了压实、胶结、溶蚀等成岩作用对储层物性的影响。结果认为：盆地及盆地周缘的构造运动和环境条件适合形成多种类型的储集体；沉积、成岩条件有利于储层孔隙的保存和发育；本区完全具备形成大气区的储层条件。
The characteristics and distribution of several main reservoirs with different types in Ying Qiong Basin are introduced in the paper.The principal sedimentary types of the reservoirs include the proximal deposit,distal deposit,low level delta,turbidite fan,turbidite channel,marine beach,subsea highland shoal,storm sheet sand and tidal sand ridge,etc.Through analyzing the relative sea level change and sequence,the depositional cycle system of the area is determined and it is thought that during the Tertiary,three times of sea level decline with a larger amplitude had been undergone and the sedimentary centre and settling centre in the basin had been also migrated in a larger distance for several times,which created the conditions favourable for the growth of the reservoirs and reservoir seal assemblages in the basin.These horizons corresponding to the sequence interfaces of the S 40 ,S 60 and S 70 respectively should be the intervals of growing reservoirs.The influence of the diageneses as compaction,cementation and solution,etc.,on the petrophysical property is also discussed.It is concluded that the tectonic movements and sedimentary environment occurring in and around the basin are suitable to the formation of various reservoir bodies;the sedimentary and diagenetic conditions are beneficial to the reservation and growth of the pores in the reservoirs;and this area is fully possessed of the reservoir conditions of forming giant gas area.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
1999年第1期20-24,共5页
Natural Gas Industry
关键词
莺琼盆地
储集层
含气区
类型
Yingqiong Basin,Reservoir characteristics,Sea level,Sedimentary facies,Depositional cycle,Sedimentary centre,Diagenesis,Stratigraphic sequence
