本文選題：渤海海域 + 中生代��； 參考：《中國(guó)海上油氣》2017年02期

【摘要】：渤海海域中生代火山巖分布廣泛,但其空間疊置關(guān)系復(fù)雜,制約了火山巖油氣藏勘探�；诖罅裤@井取心、壁心、薄片、測(cè)井、鋯石U-Pb測(cè)年以及地震資料,綜合運(yùn)用地質(zhì)分析、地球物理分析以及巖石年代學(xué)分析等方法對(duì)研究區(qū)火山巖噴發(fā)旋回進(jìn)行了劃分,建立了渤海海域中生代火山巖噴發(fā)旋回序列。渤海海域中生代火山巖可以劃分為3個(gè)噴發(fā)旋回,分別為侏羅紀(jì)(旋回Ⅰ)、早白堊世早中期(旋回Ⅱ)、早白堊世晚期至中生代末(旋回Ⅲ)。旋回Ⅱ又可細(xì)分為3個(gè)亞旋回Ⅱ1、Ⅱ2、Ⅱ3,噴發(fā)時(shí)間分別為128~122、122~118、117.8~114.4 Ma,巖性由基性向酸性演變,其中Ⅱ1亞旋回以溢流相中基性火山巖為主,沿深大斷裂呈裂隙式噴發(fā),分布廣泛;Ⅱ3亞旋回酸性火山巖沿郯廬走滑斷層成"串珠狀"零星分布,多為中心式噴發(fā);Ⅱ2亞旋回介于兩者之間。在此基礎(chǔ)上,研究了火山巖噴發(fā)旋回與油氣的關(guān)系,認(rèn)為沿郯廬斷裂帶分布的Ⅱ2和Ⅱ3亞旋回中酸性火山巖優(yōu)質(zhì)儲(chǔ)層發(fā)育,靠近生烴凹陷,具有良好的油氣輸導(dǎo)和聚集條件,是渤海海域火山巖油氣藏勘探的有利目標(biāo)。本文研究對(duì)類(lèi)似地區(qū)中生代火山巖噴發(fā)旋回劃分具有一定的借鑒意義。
[Abstract]:The Mesozoic volcanic rocks are widely distributed in Bohai Sea area, but their spatial overlay relationship is complex, which restricts the exploration of volcanic oil and gas reservoirs. Based on a large number of drilling coring, wall core, thin slice, well logging, zircon U-Pb dating and seismic data, the volcanic eruption cycles in the study area are divided by comprehensive use of geological analysis, geophysical analysis and geochronology analysis. A series of Mesozoic volcanic eruption cycles has been established in the Bohai Sea. The Mesozoic volcanic rocks in the Bohai Sea can be divided into three eruptive cycles: Jurassic (cycle 鈪，

本文編號(hào)：2031923