下扬子黄桥地区龙潭组流体包裹体特征与油气成藏期次  

Characteristics of fluid inclusions and timing of hydrocarbon accumulation in Longtan reservoirs in Huangqiao region,Lower Yangtze Basin

作　　者：李建青[1,2] 夏在连[2] 史海英[2] 花彩霞[2] 王馨[2] 

机构地区：[1]西北大学地质学系,西安710069 [2]中国石油化工股份有限公司华东分公司石油勘探开发研究院,南京210011

出　　处：《石油实验地质》2013年第2期195-198,共4页Petroleum Geology & Experiment

基　　金：中国石油化工股份有限公司科技开发部项目(P10005)

摘　　要：下扬子黄桥地区上二叠统龙潭组储层中共发育2期流体包裹体:Ⅰ期主要发育在石英颗粒成岩次生加大早中期,主要沿颗粒加大边内侧微裂隙呈带状或线状分布;Ⅱ期主要发育在石英颗粒成岩次生加大期后,主要沿切穿多个石英颗粒及其加大边的微裂隙呈线状/带状分布。包裹体均一温度分布区间75～120℃,主要集中在75～85℃,结合热—埋藏史、生排烃史分析,龙潭组烃源岩在白垩纪末期进入主生烃期,流体充注主要为侏罗纪(188～160 Ma)和晚白垩世至古近纪(60～43 Ma),认为该区龙潭组油藏形成于白垩纪末期。In the Longtan Formation of the Upper Permian in Huangqiao region of the Lower Yangtze Basin, there are 2 stages of fluid inclusion. The fluid inclusions of stage Ⅰ mainly generated during the early-middle pe- riod of quartz overgrowth, and generally located along micro-fractures within a linear zone. The fluid inclusions of stage Ⅱ mainly generated after quartz overgrowth, and distributed along micro-fractures which cut through quartz overgrowth. The homogenization temperature of fluid inclusions was 75-120℃, and the peak was 75-85℃. Analyses of geothermal evolution, burial history and hydrocarbon generation-expulsion history revealed that the main hydrocarbon generation period of the Longtan Formation source rocks was in Cretaceous, and oil charging mainly occurred in Jurassic （188-160 Ma） and from the Late Cretaceous to Paleocene （60-43 Ma）. The Long- tan reservoir mainly formed at the end of Cretaceous.

关 键 词：成藏期次 流体包裹体 龙潭组 上二叠统 黄桥地区 下扬子 

分 类 号：TE122.31[石油与天然气工程—油气勘探]