海洋地质前沿2024，Vol.40Issue(4)：9-17,9.DOI:10.16028/j.1009-2722.2023.056
丽水-椒江凹陷月桂峰组湖相烃源岩的主控因素与分布预测
Main constraining factors and distribution prediction of lacustrine hydrocarbon source rocks in Yueguifeng Formation in Lishui-Jiaojiang Sag
摘要
Abstract
The Yueguifeng Formation is the main source rock of Lishui-Jiaojiang Sag that formed in the period of strong fault filling of the Yueguifeng Formation,with strong tectonic segmentation,relatively enclosed sediment-ary environment,and unclear development characteristics of lacustrine source rock in mainly four sub-sags.To clarify the development conditions and spatial distribution of the source rocks of the Yueguifeng Formation in each hydrocarbon-rich sub-sag,and further guide the oil and gas exploration in the area,the data of logging and coring in geophysics,geochemistry,and paleontology were used based on the dynamic life cycle process of the lake basin evolution.We proposed that the four factors,in temporal order,of early-stage fault activity rate,middle-stage parent rock property and the shielding conditions,and late-stage volcanic activity,jointly constrained the de-velopment of high-quality source rock in the four major sub-sags.Under the best geological knowledge,based on multi-attribute neural network deep learning,the spatial distribution of middle-deep lacustrine hydrocarbon source rocks was depicted quantitatively.Based on the development mechanism of high-quality source rocks and the dis-tribution range of medium-deep lacustrine source rocks,the development of high-quality source rocks in the four major sub-sags was evaluated comprehensively.The results indicate that Jiaojiang A Sub-sag is a Class Ⅰ hydro-carbon rich sub-sag,Lishui A and Lishui C Sub-sags are Class Ⅱ sub-rich hydrocarbon sub-sags,and Lishui B Sub-sag is Class Ⅲ hydrocarbon-generating sub-sag.关键词
丽水-椒江凹陷/月桂峰组/烃源岩/控制因素/综合评价Key words
Lishui Jiaojiang Sag/Yueguifeng Formation/source rock/constraining factors/comprehensive eval-uation分类
海洋科学引用本文复制引用
李林致,郭刚,廖计华,王欣,李婧婧,吴斌,张晓庆..丽水-椒江凹陷月桂峰组湖相烃源岩的主控因素与分布预测[J].海洋地质前沿,2024,40(4):9-17,9.基金项目
国家科技重大专项"中国近海富烃凹陷优选与有利勘探方向预测"(2016ZX05024-002) （2016ZX05024-002）
