摘要
陕甘宁盆地中部气田的天然气产于奥陶系顶部古风化壳马家沟组白云岩储层中，储集空间的形成是不同期次溶蚀作用和充填作用相互作用的结果。溶蚀孔洞充填物为方解石、白云石、硬石膏、石英、黄铁矿等矿物，根据充填层序及矿物地球化学特征可识别出不同期次的充填物。溶蚀孔洞的充填程度和充填类型明显地控制着储层的储集性。
The gas of central gas field of Shan-Gan-Ning basin is produced from paleo-weathered crust dolostone reserviors of Majiagou formation on top Ordovician. The storage spaces of the dolostone are the products of the interaction of dissolution and filling of different stages. The vugs-filling materials are mainly the minerals such as calcite, dolomite, anhydrite, quartz, pyrite. According to their filling orders and geochemical properties,the filling materials with different stages have been identified. The vugs-filling degree and types control the reservoir quality of dolostone reservoirs.
出处
《中国海上油气（地质）》
CAS
1999年第2期97-102,共6页
China Offshore Oil and Gas(Geology)
关键词
陕甘宁盆地
中部气田
马五4段
白云岩储层
孔洞充填物
储集性
Shan-Gan-Ning basin
dolostone reservoirs
vugs-filling material
reservoiring quality
Ma-jiagou formation
