南黃海盆地中—古生代海相地層發(fā)育齊全且厚度較大,一直未獲得實(shí)質(zhì)性的油氣勘探突破。研究認(rèn)為,南黃海盆地上二疊統(tǒng)—下三疊統(tǒng)可作為1個(gè)長(zhǎng)期基準(zhǔn)面旋回�；谀宵S海盆地鉆井資料,以巖電組合旋回性特征及特殊巖性為依據(jù),將長(zhǎng)期基準(zhǔn)面旋回劃分為5個(gè)中期基準(zhǔn)面旋回(MC1-MC5)。在此基礎(chǔ)上,依據(jù)基準(zhǔn)面旋回變化和沉積環(huán)境的變遷,結(jié)合鉆井沉積相及地震相特征,對(duì)南黃海盆地二疊系—三疊系的沉積體系及充填模式進(jìn)行了分析。結(jié)果表明:南黃海盆地二疊系龍?zhí)督M、大隆組和三疊系青龍組發(fā)育6大沉積體系—河流沉積體系、三角洲沉積體系、潮坪沉積體系、開闊臺(tái)地沉積體系、局限臺(tái)地沉積體系、陸棚沉積體系;龍?zhí)督M、大隆組和青龍組沉積體系具有水體西北深、東南淺的分布特征;上二疊統(tǒng)—下三疊統(tǒng)發(fā)育兩種基準(zhǔn)面旋回充填模式,即上二疊統(tǒng)龍?zhí)督M相對(duì)穩(wěn)定的潮坪相和上二疊統(tǒng)大隆組—下三疊統(tǒng)青龍組快速海侵的陸棚相至穩(wěn)定的臺(tái)地相,這些模式可為南黃海盆地中—古生界油氣地質(zhì)評(píng)價(jià)提供基礎(chǔ)依據(jù)。

【文章頁(yè)數(shù)】：19 頁(yè)

【文章目錄】：
1 Introduction
2 Geological overview
3 Methods
    3.1 Interpretation of seismic data
    3.2 Outcrop observation
    3.3 Core description and logging analysis
4 Base-level cycle division
    4.1 Long-term base-level cycle
    4.2 Medium-term base-level cycles
        4.2.1 MC1 medium-term cycle
        4.2.2 MC2 medium-term cycle
        4.2.3 MC3 medium-term cycle
        4.2.4 MC4 medium-term cycle
        4.2.5 MC5 medium-term cycle
5 Typesandcharacteristicsofsedimentary systems
    5.1 Fluvial
    5.2 Delta
    5.3 Tidal flat
    5.4 Restricted platform
    5.5 Open platform
    5.6 Continental shelf
6 Distribution of sedimentary systems
    6.1 Longtan formation
    6.2 Dalong formation
    6.3 Qinglong formation
7 Depositional filling model
    7.1 Relatively stable tidal flat facies filling model
    7.2 Rapid marine-transgression-induced continental shelf facies–stable platform facies filling model
8 Conclusions



本文編號(hào)：3897911