CAJ | 학술논문

莺歌海盆地和琼东南盆地常被合称为莺琼盆地，但二者的天然气成藏条件明显不同：莺歌海盆地第三—第四系巨厚，老第三纪崖城组和陵水组强烈过成熟，有效源岩为新第三纪三亚组和梅山组，而琼东南盆地的主要源岩为崖城组和陵水组，上第三系的生烃强度较低；尽管莺歌海盆地和琼东南盆地均为超压盆地，但莺歌海盆地强超压和右旋张扭应力场的共同作用导致超压囊顶部破裂并发育底辟，实现了超压流体包括天然气的垂向集中排放，而琼东南盆地总体上仍为侧向分散流体系统.莺歌海盆地的重要勘探领域是与底辟有关的圈闭，而琼东南盆地的主要勘探领域应为与下第三系源岩具有良好输导通道的上第三系岩性-构造复合圈闭或下第三系构造圈闭.
앵가해분지화경동남분지상피합칭위앵경분지，단이자적천연기성장조건명현불동：앵가해분지제삼—제사계거후，로제삼기애성조화릉수조강렬과성숙，유효원암위신제삼기삼아조화매산조，이경동남분지적주요원암위애성조화릉수조，상제삼계적생경강도교저；진관앵가해분지화경동남분지균위초압분지，단앵가해분지강초압화우선장뉴응력장적공동작용도치초압낭정부파렬병발육저벽，실현료초압류체포괄천연기적수향집중배방，이경동남분지총체상잉위측향분산류체계통.앵가해분지적중요감탐영역시여저벽유관적권폐，이경동남분지적주요감탐영역응위여하제삼계원암구유량호수도통도적상제삼계암성-구조복합권폐혹하제삼계구조권폐.
The Yinggehai and Qiongdongnan basins, often called Ying-Qiong basin, are quite different in their petroleum accumulations. The Tertiary and Quaternary sediments in the Yinggehai basin is up to 17km thick, with the Oligocene Yacheng and Lingshui formations over-mature. Therefore, the effective source rocks are the Sanya and Meishan formations. The main source rocks in the Qiongdongnan basin are the Yacheng and Lingshui formations. Although both basins are overpressured, their fluid flows are greatly different. The combination of strong overpressure and tensile stress field caused by the right-lateral slipping movement has led both to the fractures in the top layers of the over-pressure systems and to the occurrences of diapirs, an expulsion pathway for the overpressured fluids including natural gases. The fluid flow in the Qiongdongnan basin, however, is compaction-driven, and laterally dispersed from the deep depression towards its surrounding areas with a relatively low fluid potential. Traps associated with diapirs are regarded as important exploration targets in the Yinggehai basin, whereas the Neogene lithological-structural complex traps with the excellent pathways to the Oligocene source rocks or the Oligocene structural traps should be considered as the main exploration targets in the Qiongdongnan basin.