摘要
根据大量的钻井资料及岩心、薄片分析,探讨了贝尔凹陷苏德尔特潜山储集层的分布规律及其主控因素。认为,贝尔凹陷苏德尔特潜山砂岩体属低孔特低渗储集层,在成岩阶段后期的改造作用下,其储集条件明显变好,潜山中部地区的贝2井—贝尔镇一带属于Ⅱ类储集层,储集能力中等;其东、西两侧的地区属于Ⅲ类储集层,储集性能变差。储集能力格局的分布主要与断裂带的发育程度和后期的改造程度有关,与原生孔渗性联系较小;潜山储集层的有效储集空间类型以构造缝、胶结物内溶孔、粒间(溶)孔和裂缝内溶孔(洞)为主,储集能力主要受到岩性、构造运动和成岩作用的影响,其中脆性多缝和构造运动活跃的地区储集能力较好,而强烈的压实作用和胶结作用是破坏潜山储集性的重要因素。
From drilling data, core and thin section analysis, the sandbody of the Suderte buried hill is of low porosity and low permeability. After being reformed by late diagenesis, its reservoir conditions get better. Reservoirs around the Bei 2 well and the Beir town in the middle of the buried hill belong to the second level and have moderate reservoir capacity; reservoirs on its east and west sides are the third level and have poor reservoir capacity. Reservoir capacity distribution relates closely to the degree of fracture development and the late reforming and less to primary porosity and permeability. The reservoir＇s effective spaces are mainly structural fractures, solution holes in cements, （dissolved） pores in particles and fractures. Reservoir capacity is affected by lithology, tectogenesis and diagenesis. The region that has brittle rocks with much fractures and much tectogenesis are prone to accumulate oil-gas, and strong compaction and cementation are important factors of destroying reservoir capacity.
出处
《石油勘探与开发》
EI
CAS
CSCD
北大核心
2008年第2期188-194,共7页
Petroleum Exploration and Development
基金
国家“973”重点基础研究项目(2006CB202308)
