摘要
玛湖凹陷南斜坡MH1井区下三叠统百口泉组油藏控藏因素复杂,构造低部位为油气层,高部位为水层,油水关系倒置,控藏因素不明、成藏规律不清一直是制约MH1井区油气勘探的瓶颈。通过对MH1井区古地貌精细研究,落实扇体主槽、相带边界和前缘亚相展布;利用叠前弹性参数反演预测优质储集层空间分布;明确MH1井区百口泉组发育5期叠置砂体,横向连通性差,形成岩性圈闭群;明确印支运动晚期南北向逆断裂是MH1井区油气初次运移的主要通道;建立MH1井区百口泉组"一砂一藏"油气成藏模式,并预测了有利成藏区的分布,部署2口评价井获得突破,验证了油藏模式,为MH1井区下步油气勘探提供理论指导。
The controlling factors of hydrocarbon accumulation in the Lower Triassic Baikouquan formation of Wellblock MH-1 on thesouthern slope of Mahu sag are very complicated. Inverse oil-water relations with oil and gas zones located on the lower structural positionsand aquifers located on the higher structural positions, unclear reservoir controlling factors and undefined reservoir forming rules are thebottleneck problems constraining petroleum exploration in the area. The distributions of main channels of fan body, facies boundary andsubfacies of fan-delta front are determined based on the detailed study on paleogeomorphology. The spatial distribution of good quality res-ervoirs are predicted by using pre-stack elastic parameter inversion. 5-period superimposed sand bodies with poor lateral connectivity de-veloped in the Baikouquan formation of Wellblock MH-1 forms a lithological trap group. The SW trending reverse fault was the main pathfor primary oil and gas migration during the late Indosinian movement. A hydrocarbon accumulation model of" one sand body is one reser-voir"is established for the Baikouquan formation in Wellblock MH-1, the distribution of favorable accumulation area is predicted andbreakthrough has been gained in the 2 appraisal wells, which can verify the model and provide theoretical guidance for further petroleumexploration in the wellblock.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2018年第1期70-75,共6页
Xinjiang Petroleum Geology
基金
国家科技重大专项(2016ZX05001-005
2016ZX05003-005)
关键词
准噶尔盆地
玛湖凹陷
南斜坡
百口泉组
成藏条件
油气成藏模式
Junggar basin
Mahu sag
southern slope
Baikouquan formation
hydrocarbon accumulation condition
hydrocarbon accumulation model
