feldspar sandstone meaning in Chinese
长石砂岩
Examples
- Fine - grained feldspar sandstone is the main oil - bearing rock and chlorite is the dominant kind of clay minerals
研究结果表明,长2油藏含油砂岩以细粒长石砂岩为主,粘土矿物中绿泥石含量较高。 - The variations in trace element contents and ratios may hold up a mirror to the lake - level fluctuations and climatic changes , which , in turn , have exerted a direct and important effect on the sequence stratigraphic development . collectively , the reservoir rocks from the yanchang formation consist dominantly of the delta front subfacies subaqueous distributary channel and channel - mouth bar microfacies and delta plain subfacies subaerial distributary channel microfacies fine - grained feldspar sandstones and siltstones . the reservoir rocks have been subjected to three stages of diagenetic and porosity evolution : ( 1 ) the porosity reduction by the mechanical compaction and chemical pressure solution during the early diagenetic stage ; ( 2 ) the porosity increase by the dissolution during the a substage of the late diagenetic stage , and ( 3 ) the porosity reduction by the cementation and filling during the b substage of the late diagenetic stage
系统的储层特征研究表明,该区延长组储层成因类型主要为三角洲前缘水下分流河道、河口砂坝及三角洲平原水上分流河道微相细粒长石砂岩、粉砂岩;储层岩石经历了压实,胶结,溶蚀等成岩作用,历经早成岩机械压实和化学压溶孔隙缩小期、晚成岩a亚期溶蚀作用孔隙扩大期及晚成岩a亚期( b亚期)胶结充填孔隙缩小期三个成岩-孔隙演化阶段;储层物性总体上具有较低孔渗、低孔渗的特点,孔隙类型主要为粒间溶孔、残余粒间孔隙、粒内溶孔、晶间孔及晶间溶孔,裂缝不发育,储集岩排驱压力和中值压力较高,孔隙结构类型以细小孔-微孔隙,微细喉-微喉型为主。