准噶尔盆地南缘三个油气成藏组合研究

按照勘探目的层位和构造特征，将准噶尔盆地南缘的中、新生界划分为上、中、下油气成藏组合，在研究每个成藏组合的地质特点、控油因素、成因机理的基础上，认为中、下部成藏组合能接受盆地南缘侏罗系主力烃源岩(资源量最大)的油气，油源通道发育，构造形成时期与油气大规模形成时期相配套，油气成藏条件优于上部成藏组合，具备形成大油气田的条件。分析卡因迪克背斜和呼图壁背斜钻探成功的经验，建议准噶尔盆地南缘下步勘探方向应为：主攻中部成藏组合，侦察下部成藏组合，兼探上部成藏组合。图2表3参2

Three oil-reservoir combinations in south marginal of Jungar Basin, Northwest China

According to target layer and structure characteristic of exploration, the Mesozoic-Cenozoic stratum are divided into three oil-reservoir combinations in south marginal of Jungar Basin. On the oil-gas geologic conditions, controlling factors of oils and cause of mechanism, midst and below oil-reservoir combinations should absorb more oil and gas from the major source rocks distributed within the south marginal of the Jungar Basin, in age of Jurassic. The reasons for that are much oil and gas channels have been generated and developed during the forming of structures, and the reservoirs have benefit conditions for constructing with the main generation of oil and gas. The anticlines of Hutubi and Kayindike have been cited to verify the importance of oil-reservoir combinations. The further survey suggestions should be to explorate the midst oil-reservoir combinations, to sconte below oil-reservoir combinations,and to try explore upper oil-reservoir combinations.