古龙油田葡萄花油层沉积特征分析—以古83区块为例

Gulong oil field Putaohua reservoir sedimentary characteristics analysis—To the gu 83 block as an example

古龙地区葡萄花油层发育水下分流河道、河口坝和席状砂微相,呈现水退～水进～水退的水体变化趋势,下砂岩组储层最为发育,中砂岩组储层发育较差,河道主要沿北北西向展布。区域沉积研究表明,古83区块葡萄花油层沉积时期主要受西部沉积体系控制,为三角洲前缘亚相,砂体类型以水下分流河道和席状砂为主。

Culong of Putaohua reservoir in development of underwater distributary channel,mouth bar and sheet sand microfacies,present water back to water to water return water change tendency,sandstone reservoir under the most developed in sandstone,reservoir development is poor,the river mainly along NNW trending.Regional deposition of research shows that,the gu 83 block of Putaohua reservoir sedimentary period is mainly influenced by Western depositional system control,the delta front facies,sand body types to underwater distributary channel and sand sheet consisting mainly of.