Seismic Data Interpretation And Study The Structural Features Of Quantou Group In Yingtaidaan Area

Based on the logging data and 3D seismic data of the 3th and 4th of Quantou group in Yingtaidaan area. On the basis of predecessors' research results, the application layer sequence stratigraphy, geophysical and structural geology and other related theories, for Yingtaidaan area Quantou group of the 3th and 4th strata on comprehensive research on seismic interpretation and structural characteristics. First of all, using synthetic seismogram, horizon calibration well combination of establishing sequence stratigraphy framework, combining coherence technology to identify fault, completed the study area purpose layer of fine interpretation of 3D seismic data; Secondly, using the well point deep relationship establishing three-dimensional velocity field in deep conversion, complete structure mapping; Again, based on structural maps and 3D seismic data, the analysis of the structural characteristics of study area purpose layer, fault combination model, structural history and sedimentary facies characteristics; Finally, combined with the feature of fault development regularities, tectonic evolution and sedimentary microfacies types, analysis of oil and gas accumulation conditions, predicting favorable zones for oil and gas gathering.Comprehensive study:Yingtaidaan area overall performance for high in the west and lower in the east in tectonic framework, whole is given priority to with sedimentary rock class, volcano in central development agencies in the study area. Work area overall tectonic units are divided into three first-order tectonic units and two first-order tectonic units:Yingtai respectively uplift from west to east, the west slope, volcanic bump, central sag, for Daan uplift in the south. In the basin under the background of tensile stress and fracture are mainly distributed in the western slope and volcanic bump tectonic belt, with trapezium graben and horst-type portfolio model is given priority to. Through the analysis of the central volcanic eruption features, to realize the volcanic eruption by the 2th of Quantou group, the distribution on the north and south. To identify the GH1, GH2, GH3, GH4, GH5, GH6, GH7, GH8, GH8, GH10, GH11, a total of 11 small volcanic institutions. Through the analysis of sedimentary facies, realize the 4th of Quantou group mainly delta front facies, the 3th of Quantou group is given priority to with delta plain facies, fine division of sedimentary microfacies in the 4th of Quantou group bottom interface, for the analysis of characteristics of the distribution of sand body and favorable area prediction has important guiding significance.In the study area purpose layer analysis of reservoiring conditions, Think purpose layer. of oil and gas mainly comes from the first of Qingshankou group of high maturity of hydrocarbon source rocks, at the same time, the density of the first of Qingshankou group mudstone is also the effective cover. Purpose more development of river channel and mouth bar sand, and the second of Quantou group of development of volcanic agencies have good storage conditions. Effectively unicom for hydrocarbon source rock and reservoir, for oil and gas migration provides good migration pathway. Comprehensive the above results, predicting favorable zones for oil and gas gathering purpose layer in the study area. Optimizing the western slope belt of sandstone reservoir and volcanic trap central depression area advantage trap.