西安石油大学学报（自然科学版）2025，Vol.40Issue(5)：1-12,12.DOI:10.3969/j.issn.1673-064X.2025.05.001
川中地区合川区块致密砂岩气藏沉积微相划分与有利区预测
Sedimentary Microfacies Division and Favorable Area Prediction of Tight Sandstone Gas Reservoir in Hechuan Block of Central Sichuan Basin
摘要
Abstract
In order to gain a deeper understanding of the sedimentary facies characteristics of the Hechuan block,clarify the distribution pattern of sedimentary facies sand-bodies,and determine favorable facies zones,the river channel was manually identified and tracked based on drilling,core,logging,and outcrop profile data,and combined with paleogeomorphological evolution characteristics and 3D seis-mic data.Using waveform classification attributes and instantaneous amplitude slicing attributes,the distribution characteristics of the river channel were further clarified,and the sedimentary facies pattern and favorable reservoir development locations of the Xu 2 member in Hechuan block were determined.The research results indicate that the Xu 2 member in Hechuan block mainly developed channel fill-ing,channel overflow,and flood plain microfacies of braided river delta,and locally developed delta front microfacies.The channel filling microfacies is the main sedimentary microfacies developed in the Xu 2 member of the study area,and the high porosity and high-quality reservoirs are mainly enriched in the main river channel zone.The reservoirs developed in Xu 21 and Xu 22 are better than those in Xu 23.The research results can provide scientific basis for the division of favorable areas for tight sandstone reservoirs in Hechuan block and the deployment of natural gas exploration and development plans.关键词
辫状河三角洲/沉积相/须二段/合川区块/四川盆地Key words
braided-delta/sedimentary facies/Xu 2 member/Hechuan block/Sichuan Basin分类
天文与地球科学引用本文复制引用
刘坤,曲立才,康鑫,尹华铭,孟凡聪,刘刚,于海生,何云俊,梁树义..川中地区合川区块致密砂岩气藏沉积微相划分与有利区预测[J].西安石油大学学报（自然科学版）,2025,40(5):1-12,12.基金项目
中国石油天然气股份有限公司重大科技专项"致密砂岩气藏提高采收率关键技术研究"(2023ZZ25) （2023ZZ25）
