摘要
白云岩是碳酸盐岩油气藏的重要储集层类型,确定优质白云岩储集层发育的主控因素及相应的地质背景对于指导白云岩油气勘探具有重要的现实意义。实践证明,原岩类型和白云石化作用机制是控制白云岩基质孔隙发育程度的主要因素;后期各类岩溶作用的改造对于优质白云岩储集层的形成尤为关键。白云岩成岩作用研究表明,在深埋条件下,白云岩既可发育大量晶间孔,又易形成溶蚀孔洞,孔洞形成后保存情况良好,有效储集空间的发育不明显受白云岩埋藏深度的制约,深埋的白云岩仍可具备优越的储集物性而成为优质储集层。由高能相带沉积物转变形成的埋藏成因白云岩、热液成因白云岩以及构造活动和水-岩作用活跃地区的白云岩是潜在的优质储集层和深部碳酸盐岩油气勘探的重点目标。
Dolomite is an important type of carbonate reservoirs.The understanding on the master control factors of high-quality dolomite reservoirs and the corresponding geological settings is of great significance to dolomite hydrocarbon exploration.Theories and case studies prove that the initial rock and the mechanism of dolomitization are key influential factors on the matrix physical properties of the dolomite.Karstification is the most critical process in the development of high-quality dolomite reservoir.Recent diagenesis study indicates that a great amount of intercrystal and corrosion pores and corrosion cavities can be developed and preserved in deep-seated dolomites,which can also form high quality reservoir.In conclusion,the burial dolomite and matrix replacive hydrothermal dolomite which are transformed from high energy sediments,and the dolomite in areas with active tectonics and water-rock interaction are potential high-quality reservoirs and key exploration targets.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2010年第2期203-210,共8页
Petroleum Exploration and Development
基金
国家重点基础研究发展计划(973)项目(2006CB202304)
关键词
白云岩
深埋
优质储集层
主控因素
勘探目标
dolomite
deep burial
quality reservoir
master control factor
exploration target
