Study Of Interpretation And Application Of Seismic Data In Xing10 Area

Oil and gas is the important strategic resources for livelihood and national security,it will be hard to be replaced in the coming decades, in 1993, China becomes a net oil importer, and imports increased year by year, so it is great value that the oil and gas resources exploration and development has. By the end of 2011, most of the Changyuan Daqing block has completed the work of multi-discipline reservoir with well data. In 2010 Xingnan development area has achieved the comprehensive coverage of the multidisciplinary reservoir research results, geological model was established by the geological understanding results of well data, history matching precision reached more than 80%, but there are still individual wells has lower layer history matching precision, which is not conducive to the fine adjustment and tapping the potential, main factors affecting history matching precision is the accuracy of geological understanding.Seismic data is a very important content in the geophysical work. The quality of the seismic data being translated into the geological language determines whether the seismic data can be fully used. It is necessary to in-depth understand the characteristics of structure and sedimentary microfacies to complete sand body prediction between wells with a precise and detailed structural interpretation and 3D seismic data interpretation under the high density of well pattern in the study area.With the continuous development of fine reservoir description technology, the multidisciplinary reservoir study based on geological understanding in Daqing Oilfield is graduately carried out. In this paper, prediction accuracy studies based on the combination well and seismic are carried out mainly on Putaohua oil layer of Xing10 district. Based on the theory of sequence stratigraphy, combined with petroleum geology, tectonic geology and geophysics, the fine structure interpretation of the 3D seismic data in the Xing10 area was carried out. Through optimization of seismic attributes for reservoir prediction, quantity characterization of the effect of seismic attributes on threshold value of sandstone and mudstone is realized, so as to accurately describe the boundary and direction of the river sand. The coincidence rate showed that, prediction accuracy of interwell channel sand body reaches 85%, while the block application results showed that after the combination of well and seismic the narrow river channel sand became more continuous and river boundary and river swing position changed a lot, and interwell connectivity became more accurate, so as to provide a more reliable basis for the further development of the residual oil study of channel sand bodies.The 3D structural interpretation and modeling method with combination of well and seismic was completed and fault spatial combination relations were accurately characterizated, the fault model was established; structure modeling algorithm adaptability analysis was carried on to build the 3D structure model; micro amplitude construction plan with unit level was drawed to summarize the structure and fault development characteristics. Through the combination of well and seismic reservoir fine description of seismic attributes and sand body distribution correlation was carried on to explore the method to describe sand body between well with seismic multi-attribute; using combination of well and seismic method to study sand body distribution in second class reservoir. Reservoir prediction is carried out with inversion, and finally a three-dimensional model of the study area is established, which has guiding significance to accurately grasp the distribution of reservoir sand body and remaining oil, and deploy the well network.