本文選題：西沙海域 + 碳酸鹽臺地��； 參考：《地質(zhì)學報》2017年06期

【摘要】：本文基于南海北部西沙海域地震數(shù)據(jù)及鉆井資料,結(jié)合碳酸鹽臺地的邊緣特征及其地震反射特征,首次建立了研究區(qū)中新世碳酸鹽臺地邊界的三個識別標志:巖性突變界面、斷層界面和潮汐水道。在對地震數(shù)據(jù)系統(tǒng)的解釋和鉆井資料分析基礎(chǔ)之上,厘定了該區(qū)生物礁及碳酸鹽臺地的時空分布,總結(jié)其分布規(guī)律,西沙海域中新世碳酸鹽臺地可以分為六期,進一步劃分三個演化階段,分別為中中新世早期的繁盛階段、中中新世晚期的衰退階段、晚中新世以來的淹沒階段,各階段碳酸鹽臺地的沉積相帶發(fā)育完整,其中生物礁主要分布臺地的西-西南緣。統(tǒng)計結(jié)果顯示,生物礁及碳酸鹽臺地全面發(fā)育時期的面積達到了80000km~2,后期隨著臺地的衰退而規(guī)模有所減小。西沙海域中新世碳酸鹽巖分布廣泛、規(guī)模巨大,而且在發(fā)育過程中經(jīng)歷了多期暴露而遭受淋濾,進一步增大了其孔隙度,具備形成優(yōu)質(zhì)儲層的前提。結(jié)合區(qū)域油氣地質(zhì)條件分析與探討,建立生物礁及碳酸鹽臺地的成藏模式,提出西沙海域碳酸鹽臺地具有典型"下生上儲上蓋"的成藏過程,指出西沙海域鄰近華光凹陷和中建南盆地北部的碳酸鹽臺地是油氣勘探的兩大有利區(qū)帶。
[Abstract]:Based on the seismic data and drilling data of Xisha sea area in the northern part of the South China Sea, combined with the marginal characteristics of carbonate platform and its seismic reflection characteristics, three identification markers of Miocene carbonate platform boundary in the study area are established for the first time: the lithologic abrupt interface. Fault interfaces and tidal channels. Based on the interpretation of seismic data system and the analysis of drilling data, the temporal and spatial distribution of reef and carbonate platform in this area is determined, and the distribution law is summarized. The Mesocene carbonate platform in Xisha Sea area can be divided into six periods. It is further divided into three stages: the prosperous stage in the early Miocene, the declining stage in the late Miocene, the submerged stage since the late Miocene, and the complete development of sedimentary facies in each stage. Among them the reef mainly distributes the west-southwest margin of platform. The statistical results show that the area of the reef and carbonate platform reaches 800 km / m ~ 2 during the full development period, and the scale decreases with the decline of the platform in the later stage. The Carbonate rocks of the Miocene in Xisha Sea area are widely distributed and have a large scale, and have experienced multiple periods of exposure and been leached during the development process, which further increases the porosity of the carbonate rocks and has the premise of forming high quality reservoirs. Based on the analysis and discussion of regional oil and gas geological conditions, the reservoir forming model of reef and carbonate platform is established, and it is proposed that the carbonate platform in Xisha sea area has the typical process of "upper reservoir cap". It is pointed out that the carbonate platform near Huaguang Sag in Xisha Sea area and the carbonate platform in the northern part of Zhongjiannan Basin are two favorable zones for oil and gas exploration.
【作者單位】： 國土資源部海底礦產(chǎn)資源重點實驗室廣州海洋地質(zhì)調(diào)查局;中國科學院深�？茖W與工程研究所;中國科學院資源地層學與古地理學重點實驗室南京地質(zhì)古生物研究所;
【基金】：中國地質(zhì)調(diào)查局項目:南海南部油氣資源調(diào)查(編號:DD20160155) 國家自然科學基金面上項目(編號:41272014)的聯(lián)合資助成果
【分類號】：P588.245;P618.13

【相似文獻】

相關(guān)期刊論文 前10條

1 徐強;劉寶s，

本文編號：2100690