万安盆地油气地质特征及其资源潜力新认识

发布时间：2019-07-01 13:54

【摘要】：利用最新掌握的地震及分析化验资料,系统分析了万安盆地地质条件、油气分布特征及富集规律,获得了对其油气地质特征和资源潜力的新认识。万安盆地总体上经历了断拗期和拗陷期2大构造演化阶段,发育近岸湖沼、扇三角洲、滨海三角洲、滨海—浅海、半深海相沉积,物源自西向东;主力烃源岩为渐新统、下中新统的泥岩、页岩、煤及含煤泥岩,分布于中部坳陷和北部坳陷;储层主要有三类,分别为渐新统到上新统砂岩、中—上中新统碳酸盐岩、前古近系基岩;盖层为上新统—第四系和上渐新统—下中新统2套区域性地层;发育西部油气带、中部油气带和南部气带3大有利油气聚集区。万安盆地油气资源潜力巨大,盆地地质资源量分别为石油29.38×10~8t,天然气34 897×10~8m~3。
[Abstract]:Based on the latest seismic and analytical data, the geological conditions, oil and gas distribution characteristics and enrichment law of Wanan Basin are systematically analyzed, and a new understanding of its oil and gas geological characteristics and resource potential is obtained. On the whole, Wanan Basin has experienced two major tectonic evolution stages: fault depression and depression period, with inshore lake marsh, fan Delta, coastal-shallow sea, semi-deep-sea deposits, with provenance from west to east, the main source rocks are Oligocene, Lower Miocene mudstone, shale, coal and coal-bearing mudstone, distributed in the central depression and the northern depression, and the main source rocks are Oligocene, Lower Miocene mudstone, shale, coal and coal-bearing mudstone, which are distributed in the central depression and the northern depression. There are three main types of reservoirs, which are Oligocene to Pligocene sandstone, Meso-Miocene carbonate rock and Pogene bedrock, and the caprock is two sets of regional strata from Pliocene to Quaternary and Upper Oligocene to Lower Miocene. Three favorable oil and gas accumulation areas are developed in the western oil-gas belt, the central oil-gas belt and the southern gas belt. The potential of oil and gas resources in Wanan Basin is huge. The geological resources of the basin are 29.38 脳 10 ~ 8t of oil and 34.897 脳 10 ~ 8m of natural gas, respectively.
【作者单位】：中海油研究总院;中国石油大学油气资源与探测国家重点实验室;长江大学油气资源与勘探技术教育部重点实验室;
【基金】：国家科技重大专项(2011ZX05025-005) 全国油气资源动态评价(2013,2015)资助
【分类号】：P618.13

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