石油实验地质
石油實驗地質
석유실험지질
EXPERIMENTAL PETROLEUM GEOLOGY
2014年
5期
523-531,545
,共10页
海相中%古生界%盆地原型%改造与成藏%扬子地区%南黄海盆地
海相中%古生界%盆地原型%改造與成藏%颺子地區%南黃海盆地
해상중%고생계%분지원형%개조여성장%양자지구%남황해분지
marine Mesozoic-Paleozoic strata%basin prototype%reformation and formation%Yangtze area%Southern Yellow Sea Basin
南黄海盆地位处下扬子地块东延部位，发育巨厚的海相中、古生界地层。通过研究扬子地区海相中、古生界的盆地原型演化及其主要烃源岩区域发育特征，指出南黄海地区海相中、古生界应发育有类似扬子地区的-C1、O3-S1、P1、P2等4套主要烃源岩，尤其要重视在扬子台内广泛发育的后3套区域烃源岩。同时，通过对扬子地区中新生代历次构造变格对海相中、古生界的改造特征及其主要油气成藏类型，以及南黄海盆地的构造特点等分析，认为南黄海盆地中部隆起-南部坳陷区是勘探海相中、古生界原生油气藏的有利区。该区海相中、古生界烃源基础好、实体保存完整、埋藏相对浅，更重要的是构造相对稳定、后期变形弱，可能发育有类似苏北黄桥地区的海相原生残留型油气藏。盆地北部坳陷因紧靠苏鲁造山带，海相中、古生界遭受了强烈变形甚至变位改造，在晚期断陷叠加区有可能形成类似苏南句容地区的重建型油气藏。而勿南沙隆起因长期处于中新生代强烈褶皱隆起带，海相中、古生界应以发育原生破坏型古油藏为主。
南黃海盆地位處下颺子地塊東延部位，髮育巨厚的海相中、古生界地層。通過研究颺子地區海相中、古生界的盆地原型縯化及其主要烴源巖區域髮育特徵，指齣南黃海地區海相中、古生界應髮育有類似颺子地區的-C1、O3-S1、P1、P2等4套主要烴源巖，尤其要重視在颺子檯內廣汎髮育的後3套區域烴源巖。同時，通過對颺子地區中新生代歷次構造變格對海相中、古生界的改造特徵及其主要油氣成藏類型，以及南黃海盆地的構造特點等分析，認為南黃海盆地中部隆起-南部坳陷區是勘探海相中、古生界原生油氣藏的有利區。該區海相中、古生界烴源基礎好、實體保存完整、埋藏相對淺，更重要的是構造相對穩定、後期變形弱，可能髮育有類似囌北黃橋地區的海相原生殘留型油氣藏。盆地北部坳陷因緊靠囌魯造山帶，海相中、古生界遭受瞭彊烈變形甚至變位改造，在晚期斷陷疊加區有可能形成類似囌南句容地區的重建型油氣藏。而勿南沙隆起因長期處于中新生代彊烈褶皺隆起帶，海相中、古生界應以髮育原生破壞型古油藏為主。
남황해분지위처하양자지괴동연부위，발육거후적해상중、고생계지층。통과연구양자지구해상중、고생계적분지원형연화급기주요경원암구역발육특정，지출남황해지구해상중、고생계응발육유유사양자지구적-C1、O3-S1、P1、P2등4투주요경원암，우기요중시재양자태내엄범발육적후3투구역경원암。동시，통과대양자지구중신생대력차구조변격대해상중、고생계적개조특정급기주요유기성장류형，이급남황해분지적구조특점등분석，인위남황해분지중부륭기-남부요함구시감탐해상중、고생계원생유기장적유리구。해구해상중、고생계경원기출호、실체보존완정、매장상대천，경중요적시구조상대은정、후기변형약，가능발육유유사소북황교지구적해상원생잔류형유기장。분지북부요함인긴고소로조산대，해상중、고생계조수료강렬변형심지변위개조，재만기단함첩가구유가능형성유사소남구용지구적중건형유기장。이물남사륭기인장기처우중신생대강렬습추륭기대，해상중、고생계응이발육원생파배형고유장위주。
The Southern Yellow Sea Basin locates in the eastern extension region of the Yangtze area, where ma-rine Mesozoic-Paleozoic strata with great thickness developed. In order to investigate the petroleum geologic condi-tions and exploration direction of these marine Mesozoic-Paleozoic strata, and based on the evolution of marine Mesozoic-Paleozoic basin prototype and the regional development characteristics of main source rocks, the paper indicates that four main source rocks developed in the marine Mesozoic-Paleozoic strata in the Southern Yellow Sea Basin, similar with four source rocks (-C1, O3-S1, P1, P2) in the Yangtze area. The later three main source rocks which were widely developed in the inner Yangtze area need to be paid more attention. Meanwhile, according to the analysis of the reformation characteristics of all previous Cenozoic-Mesozoic tectonic declensions to the marine Mesozoic-Paleozoic strata in Yangtze area as well as the main petroleum formation types in the Yangtze area and the structural features of the Southern Yellow Sea Basin, it is suggested that the middle uplift and the southern de-pression area are the favorable exploration areas of marine Mesozoic-Paleozoic primary petroleum reservoirs. The marine Mesozoic-Paleozoic source rocks are in great conditions in these areas, completely preserved, and shallowly buried, and most important is that the structure was relatively stable with weak reformation in the later period. There could be some residual marine Mesozoic-Paleozoic primary petroleum reservoirs similar as those in the Huangqiao area in the northern Jiangsu. The northern depression of this basin was closely adjoining to the Sulu orogenic belt, therefore, the marine Mesozoic-Paleozoic strata was undergoing great deformation and even deflection. Similar to the Jurong area in the southern Jiangsu, the deformation petroleum reservoir could be developed in the later fault depression area. The Wunansha uplift was in the Cenozoic-Mesozoic intense fold-uplift belt for a long time, and mainly destructive primary petroleum reservoirs were developed in the marine Mesozoic-Paleozoic strata.
