摘要:
长昌凹陷位于琼东南盆地深水区中央坳陷东部,是深水勘探新区。通过对凹陷成藏条件分析认为,长昌凹陷供烃充足;存在三角洲砂岩、滨海相砂岩、海底扇及水道砂岩等4种类型储层,且储盖组合发育;发育多层系构造圈闭,面积普遍较大;油气成藏条件优越。在上述研究基础上,对长昌凹陷A、B、C、D、E 5个次一级洼陷勘探潜力进行了评价,认为长昌环A洼成藏特征好,发育大型有利目标。落实万宁X-1、万宁X-2、长昌X-1等多个大中型"构造＋岩性"圈闭,圈闭含油气信息好,潜在资源量大,是琼东南盆地深水区下步勘探的重点。
Abstract:
The Changchang Sag is located in the Eastern part of the central depression of the Qiongdongnan Basin. It is a new deep water exploration target. Analysis of reservoir forming conditions indicates that there is sufficient hydrocarbon supply, with deltaic sandstone, coastal sandstone, submarine fan and channel filling as reservoirs, and well developed multilayer structural traps of larger size, that forms an excellent reservoir-cap rock assemblage for oil and gas accumulation. Assessment of resource potential for the five sub-sags of A,B,C,D,E of the Changchang Sag suggests that there occurs great oil and gas potential in the sub-sags of A. The large and medium-sized structural and lithologic traps of the WN X-1, WN X-2, CC X-1 and others should be favorable large targets for future exploration in the Qiongdongnan basin.
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