印度尼西亚萨拉瓦提盆地第三系K ais组碳酸盐岩生物礁圈闭特征

萨拉瓦提盆地位于东印度尼西亚巴布亚岛的鸟头部分,萨拉瓦提盆地中新世发育的Kais组碳酸盐岩是东南亚第三系碳酸盐岩的主要勘探对象之一。Kais组生物礁是盆地的主要储层和产层。在前人对Kais组碳酸盐岩的基本石油地质特征,特别是沉积特征的研究基础上,结合近年勘探的新资料,进一步探讨萨拉瓦提盆地中新世泻湖相沉积特点,对Kais组生物礁类型、圈闭类型及其储集性进行了较为系统的研究,认为萨拉瓦提盆地Kais组碳酸盐岩具有4种生物礁类型、3种圈闭类型。Kais组碳酸盐岩总体上为二元结构,在Kais组碳酸盐岩下部的滩礁层分布稳定,可作为区域油气运载层。正确认识和把握该盆地生物礁圈闭的特征对指导下一步油气勘探有重要意义。

Reef Trap Characteristics of Kais Carbonate in Salawati Basin, Indonesia

The Salawati Basin is located at the Birds head of the Papua Island, Eastern Indonesia. The Miocene Kais carbonate in the Salawati Basin is one of the classic targets of the Tertiary in Southeast Asia. The reefs of the Kais Formation are the main producing reservoirs. By study on the basic petroleum geology, especially on the sedimentary characteristics and the Kais carbonate combined with Companies in Indonesia, the sedimentary characteristics of the recent new data from the PetroChina International facies in the Miocene are further studied, and the types of reefs and traps of the Kais Formation are systematically studied and divided. Four reef traps are classified, and the Kais carbonate can be divided into two parts in framework. There are permeable channels in the lower part of Kais carbonate, which contain steady reefal sediments and can act as migration paths of hydrocarbons. It is very important to recognize the characteristics of the reef traps correctly for further petroleum exploration in the basin.