The Study On Tectonic Features In Heidimiao Oil Layer Of Mao701Block In Aonan Oilfield

This thesis is based on the following theories---architectonic geology,sedimentology, petroleum geology, reservoir geology, seismic stratigraphy. Throughthe analysis of structural features, structural evolution, trap assessment, analysis ofsedimentary microfacies, law of sandbody distribution, the features of oilylayerstructure will be studied in Mao701block Hei dimiao.Through the research, the author finds the following findings:1) The study area is made up of structural framework, the east is Three zhaosyncline,the west is south-north Ao baota structural belt. The west side developanticline, The east side develop Fault nose.2) faults of Hei dimiao oilylayer also manifest certain regularity.The fractuer ofnorth-west and north-west-west is north-west throughgoing fault. On plane faultcomplex are six fracture belt throughgoing faults, the outstretched west-north normalfaults belong to early fault, which has a good control on movement and accumulationof oil gas.3) according to the vertical-growth features in the study area, we can get anunderstanding of entrapment development in this area. There are four types ofentrapments: backbreaker, anticline, fault block and fornix. And each trap has The next big with small features.4) we can find out that structural framework makes a great change in the laterperiod of structural deformation by the sectional drawing of structural history, isopachmap of Hei dimiao oilylayer and buried depth map which is formed around the timewhen top and bottom interface of Hei dimiao oilylayer is deformed at CretaceousPeriod. There are some similarities between structural framework after thesedimentation of Mingshui Formation and ancient landform at the period ofsedimentation of every fault, which is characteristic of north–west structure with theupward and sunken interlace, while after sedimentation reversal denudation ofMingshui Formation, the structural framework makes great change. In other words,similar to present structural framework, it is made up of the first-period swelling, eastis sanzhao syncline. west is south-north Ao baota structural belt.