马来盆地成藏规律研究及有利区预测

马来盆地烃源岩包括湖相页岩和河流三角洲相煤、页岩.湖相烃源岩为盆地主力烃源岩，K组页岩是盆地中生烃潜力最好的烃源岩.盆地中部源岩通常都是过成熟，边缘大多处于生油窗或未成熟.中-晚中新世马来盆地发生构造反转，反转主要集中在盆地的东南部和中部，构造反转与油气成藏关系密切.盆地中央的反转强度比侧翼大，东南方向反转强度增加.马来盆地大致划分为4个成藏组合带：基底成藏组合带、下部成藏组合带、中部成藏组合带和上部成藏组合带.晚渐新世-中中新世构造成藏组合带为马来盆地内最重要的一个成藏组合带，其石油储量占整个盆地的85%，天然气占48%.盆地烃源岩经历多期生烃和混合生烃的过程，在盆地南部烃源岩生烃受到抑制.油气运移以横向运移为主，垂向运移为辅.油气藏分布主要受烃源岩成熟度和盆地形态的控制，呈现东南部和中部为油藏、北部为气藏的分布格局.将马来盆地划分为6个大勘探区域，其中东南挤压背斜区是马来盆地主力油气产区，石油储量占整个马来盆地的69%，天然气储量占62%.提出9个潜在有利目标区，其中3个为潜在勘探有利区，6个为新兴勘探区.

RESERVOIR FORMATION REGULARITY AND FAVORABLE AREA PREDICTION OF MALAY BASIN

The source rocks of Malay Basin include lacustrine shale and fluvial delta coal and shale, in which the lacustrine source rocks are dominated, and the shale of K Formation has the best hydrocarbon generation potential. The source rocks in central basin are usually over-mature, while those at the edge are mostly in oil generation window or immature. The tectonic inversion of Malay Basin occurred in Middle-Late Miocene, which was mainly concentrated in the southeastern and central basin and closely related with hydrocarbon accumulation. The inversion in the center is more intensive than that in the flank of basin and increases southeastward. The basin is roughly divided into basement, bottom, middle and upper reservoir combinations. The Late Oligocene-Middle Miocene structural reservoir combination is the most significant one, with the oil reserves accounting for 85% and natural gas 48% of the basin. The source rocks experienced the process of multi-phase hydrocarbon generation and mixed hydrocarbon generation, and the hydrocarbon generation in the south of basin was restrained. The oil-gas migration is mainly lateral, supplemented by vertical migration. The distribution of oil-gas reservoir is mainly controlled by source rock maturity and basin shape, which is presented as oil reservoir in the southeast and center and gas reservoir in the north. The Malay Basin is divided into 6 exploration areas, among which the southeastern extruded anticline is the main oil-gas production area with the oil reserves making up 69% and natural gas reserves 62% of the entire basin. Nine target areas are proposed, including 3 potential favorable exploration areas and 6 new exploration areas.