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.
出处
《石油实验地质》
CAS
CSCD
北大核心
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)
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
hydrocarbon accumulation stage
fluid inclusion
Longtan Formation
Upper Permian
Huangqiaoregion
Lower Yangtze Basin
