珠江口盆地珠江组碳酸盐岩储层质量评价

发布时间：2019-01-04 18:19

【摘要】：岩芯观察、薄片鉴定及物性分析等研究表明,珠江口盆地东沙隆起惠州、流花和陆丰3个地区珠江组碳酸盐岩储层质量明显不同。惠州地区珠江组碳酸盐岩在成岩过程中发育多期次的胶结作用,强烈的胶结作用严重阻塞孔隙,面孔率大多小于1%,渗透率以小于1 m D为主,储层质量最差;广泛的不同期次的溶解作用使得流花地区以粒间溶孔、铸模孔、超大孔及晶洞孔等次生孔为主,孔隙度和渗透率值在3个地区中最高,孔渗分布显著正偏,显示良好的孔隙度渗透率关系,对于获得某一特定渗透率所需的较低的截止孔隙度值,储层质量最好;陆丰地区成岩早期发育的胶结作用有利于原生孔隙的保存,后期受到一定的溶解作用改造,但溶解作用远不及流花地区发育,孔隙构成以粒间孔、生物骨架孔、粒内孔等原生孔为主,原生孔相对较差的连通性使其孔隙度虽然与流花地区大致相当,但渗透率却要比流花地区低得多,获得相同渗透率所需要的截止孔隙度比流花地区高,储层质量中等。
[Abstract]:The core observation, thin section identification and physical property analysis show that the carbonate reservoir quality of Zhujiang formation in Huizhou, Liuhua and Lufeng areas of Dongsha uplift in Pearl River mouth basin is obviously different. The carbonate rocks of Zhujiang formation in Huizhou area developed multiple periods of cementation during diagenesis, the strong cementation seriously blocked the pores, the porosity was less than 1, the permeability was less than 1 MD, and the reservoir quality was the worst. Due to the extensive dissolving effect of different time and order, the main secondary pores in Liuhua area are intergranular solution pore, mold pore, super pore and crystal hole. The porosity and permeability are the highest in the three regions, and the distribution of pore and permeability is significantly positive. It shows good porosity and permeability relationship, and the reservoir quality is the best for obtaining the lower cut-off porosity value required for a particular permeability. The cementation of the early diagenesis in Lufeng area is beneficial to the preservation of primary pores, but the dissolution process is far less developed than that in Liuhua area. The pore is composed of intergranular pore and biological skeleton pore. The relative poor connectivity of the primary pore makes the porosity of the primary pore about the same as that of the Liuhua area, but the permeability is much lower than that of the Liuhua area, and the cut-off porosity required to obtain the same permeability is higher than that in the Flower area. The reservoir quality is medium.
【作者单位】：贵州工程应用技术学院矿业工程学院;成都理工大学沉积地质研究院;中海石油(中国)有限公司深圳分公司;
【基金】：国家科技重大专项(Z2008SLSZ-052) 国家自然科学基金(41172099,41272130) 贵州省高校优秀科技创新人才支持计划(黔教合KY字[2015]504)
【分类号】：P618.13

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