CAJ | 학술논문

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.
하양자황교지구상이첩통룡담조저층중공발육2기류체포과체:Ⅰ기주요발육재석영과립성암차생가대조중기,주요연과립가대변내측미렬극정대상혹선상분포;Ⅱ기주요발육재석영과립성암차생가대기후,주요연절천다개석영과립급기가대변적미렬극정선상/대상분포.포과체균일온도분포구간75~120℃,주요집중재75~85℃,결합열—매장사、생배경사분석,룡담조경원암재백성기말기진입주생경기,류체충주주요위주라기(188~160 Ma)화만백성세지고근기(60~43 Ma),인위해구룡담조유장형성우백성기말기.
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.