海洋地质前沿2025，Vol.41Issue(6)：1-13,13.DOI:10.16028/j.1009-2722.2024.189
浅海重力流低渗细粒沉积砂岩储层质量评价与预测
Quality evaluation and prediction of low permeability fine-grained sandstone reservoir of shallow marine gravity flow:a case study of the First Member of Huangliu Formation in Dongfang A area of Yinggehai Basin
摘要
Abstract
The high-temperature and high-pressure low-permeability gas reservoirs in Dongfang A area of Yinggehai Basin have not yet achieved effective large-scale development,making the search for favorable reser-voirs crucial.Utilizing rock core testing and analysis methods such as laser granulometry,thin section petro-graphy,scanning electron microscopy,and high-pressure mercury injection,we first investigated the microscopic differences in reservoir characteristics,and classified and evaluated reservoir quality differences.Then,by analyz-ing the relationship between reservoir quality differences and well logging features,we selected well logging para-meters suitable for evaluating reservoir quality.Using the principal component analysis method,we constructed sensitivity factor curves that reflect the quality of reservoirs.Finally,based on the co-simulation method of sensit-ivity factor curves and seismic waveform indicators,we predicted the reservoir quality.Results indicate that reser-voir quality is mainly determined by mudstone production characteristics.When the mud content and the sedi-ment grain size of the reservoirs are similar,the reservoir quality in the study area could be divided into three grade levels based on mudstone production characteristics.For Grade Ⅰ reservoirs,the mudstone production state is characterized by orderly distributed mudstone bands,with deposits of coarse-grained siltstone,and strong dis-solution effects.Grade Ⅱ reservoirs are characterized by mixed distribution of mudstone,with medium to coarse-grained siltstone deposits,and moderate to strong dissolution intensity.Grade Ⅲ reservoirs exhibit scattered mud-stone production in a dispersed state,with the deposition of fine-grained siltstone in weak dissolution intensity.Grade Ⅰ and Grade Ⅱ reservoirs are favorable reservoirs.The established reservoir quality grading model has a cumulative variance contribution rate of 98.1%,capable of reflecting reservoir quality differences in the study area.A reservoir quality prediction method based on the synergy of reservoir quality sensitivity factors and seis-mic waveform indicators was proposed.The predicted results are highly consistent with actual drilling data,re-vealing the spatial distribution of favorable reservoirs.This approach has significant implications for guiding de-velopment decisions and well deployment in gas fields.关键词
莺歌海盆地/低渗储层/细粒沉积砂岩/储层质量/波形指示反演Key words
Yinggehai Basin/low-permeability reservoir/fine-grained sedimentary sandstone/reservoir quality/waveform-indicated inversion分类
能源科技引用本文复制引用
朱绍鹏,张冲,周伟,孟迪,汤晓宇..浅海重力流低渗细粒沉积砂岩储层质量评价与预测[J].海洋地质前沿,2025,41(6):1-13,13.基金项目
海南省"南海新星"科技创新人才平台项目"东方1-1气田高温高压低渗气藏成因机制与精细表征研究"(NHXXRCXM202368) （NHXXRCXM202368）
