渤海湾盆地深层古生界油气勘探前景

渤海湾盆地的古生界烃源岩自沉积以来,遭受了多期复杂的构造变动,烃源岩经历了不均一的抬升、变形、埋藏、甚至岩浆作用,导致了烃源岩生烃演化的不连续性和阶段性,针对这一问题,研究了渤海湾盆地古生办烃源岩的埋藏史和受热史。结果表明：研究区古生办的最高受热温度从加里东期到喜山期的“脉动式”递增导致有机质成熟度呈阶梯式增大,并引直多次生烃作用,主要生烃演化发生在印支期、燕山期和喜马拉雅山晚期,且喜马拉雅山晚期的生烃演化具有重要意义,是渤海湾盆地深层油气勘探的方向,最后,提出了勘探的有利区块。

Oil-Gas Exploration Prospect at Depth of Paleozoic Group in Baohai Bay Basin

After the source rocks had deposited in Paleozoic area, the Bohai Bay Basin had undergone several complicated tectonic changes, and the source rocks experienced such actions as inhomogeneous uplift, deformation, burial, and magma effect resulting in a discontinuity and in stages for the generation and evolution hydrocarbon. Aiming at this problem, the burial and heating history of source rocks in the basin was researched. The result shows that the heating temperature increased from Caledonian to Himalayan epoch in a "pulse" way, resulting in an increase of maturation of organic matter, causing several times of hydrocarbon generation. The hydrocarbon generation and evolution occurred mainly in the Indo china epoch, Yenshanian epoch, and the late Himalayan epoch, with the late Himalayan epoch being the most significant. So it has a good prospect for oil gas exploration at depth in Bohai Bay Basin.