摘要
从有机包裹体及成岩作用研究的角度对崖21－1构造油气成藏作了初步分析。崖21－1构造上第三系砂岩储层烃类丰度高，演化程度也较高，储层经历了两期烃类运聚过程，运聚时储层温度在145－165℃，埋深在3100－3600m，时间为上新世－第四纪，油／气源来自梅山组。构造顶部下第三系砂岩储层为含烃水层，少量的烃类是崖城组烃源岩早期排烃的产物。构造顶部砂岩储层中可能存在一致密胶结带，此胶结带对向上运移的油气起了封堵作用。构造形态及沉积特征是形成胶结带的主要原因，而成岩胶结作用与油气运移的时间导致油气运聚最终与构造顶部浅层无缘。推测在胶结带下方和构造翼部可能形成油气富集。
Using organic inclusions and diagenesis study the oil/gas accumulation of the YA21-1 structure in Qiongdongnan Basin. The results suggest that: 1) Hydrocarbon originated from Meishan Formation with high abundance and higher maturity has undergone two stages of migration and accumulation in sandstone reservoir of Neogene. The reservoir was buried in 3100-3600m, and its temperature was in 145-165℃ during the oil/gas migration and accumulation that occurred in Pliocene-Quaternary. 2) The sandstone reservoir of Eogene is hydrocarbon-bearing aquifer in the top part of the structure. The hydrocarbon originated from Yacheng Formation with lower maturity had filled in reservoir during its buried depth in 3100-3400m and temperature in 145-155℃. 3)A dense cement zone possibly occurred in the top part of the structure, and the cement zone resisted the upward migration of oil/gas. 4) The main reasons for cement zone formation are structure shape and deposit properties. The time difference between diagenetic cementation and oil/gas migration result to no commercial accumulation in the structure top. 5) Predicating that the oil/gas accumulation zone possibly occurred under the cement zone and in the wings of the structure.
出处
《中国海上油气（地质）》
1998年第1期4-11,共8页
China Offshore Oil and Gas(Geology)
