地质科技情报2018，Vol.37Issue(4)：141-145,5.DOI:10.19509/j.cnki.dzkq.2018.0418
D气田群黄流组一段CO2对储层质量的影响
Effect of CO2 on Reservoir Quality in Huang-1 Member of Huangliu Formation in D Gasfield Group
摘要
Abstract
This paper studies the reaction mechanism of CO2-formation water-sandstone by using gas composition data, rock thin sections, and quantitative analysis of pore and regular physical properties.Results show that:in the early period, CO2 dissolves in water to form carbonate, causing the skeleton particles and the early cement to dissolve and form a large number of pores.While in the later period, excessive H+depletion makes the solution alkaline, and leads HCO3- carried by the downward heat flow and CO2 hydrolysis and Mg2+, Fe2+ formed in early strata to form carbonate cement, with iron dolomite as a typical representative.The iron dolomite is accumulated in alkaline environment and block the pore and throat, finally, reduces the reservoir quality by combining with the early constructive diagenesis and late destructive diagenesis.This is especially obvious when CO2 content is greater than 10％.关键词
莺歌海盆地/CO2/黄流组一段/储层质量/铁白云石Key words
Yinggehai Basin/CO2/Huang-1 Member of Huangliu Formation/reservoir quality/iron dolomite分类
天文与地球科学引用本文复制引用
甘永年,叶青,漆智,郇金来,吴倩..D气田群黄流组一段CO2对储层质量的影响[J].地质科技情报,2018,37(4):141-145,5.基金项目
国家科技重大专项"莺琼盆地高温高压天然气富集规律与勘探开发关键技术"(三期)(2016ZX05024-005) （三期）
