Abstract
The use of small blocks with model-building results for overall structural model splicing can unify fault understanding, effectively integrate existing small block model results, and form a unified and continuous overall model. This article focuses on the structural models of two small blocks in the central and western parts of a certain area, and studies the method of splicing structural models at the sedimentary unit level to lay the foundation for the precise tapping of the potential of the fault edge.
Highlights
At present, an oilfield has entered into an extraordinarily high water-bearing period, the remaining oil distribution is scattered, and the edge of the fault has become a favorable area for residual oil tapping
Since the well-seismic combination of tectonic studies was carried out in an oilfield in 2007, it has deepened the understanding of tectonic features in three-dimensional space, achieved full coverage of well-seismic combination in the whole area, and finely delineated the sedimentary unit-level stratigraphic model, with a total of 18 three-dimensional fine tectonic models for small blocks
The drawbacks of the sub-block tectonic model have been found in practice in two main areas: firstly, the incomplete data of the fault model wells at the boundaries do not provide highly accurate cross-block model results, which limits the application of the results; secondly, the irregular shape of the generated fault polygons does not provide high accuracy in the delineation of the upper and lower plates
Summary
An oilfield has entered into an extraordinarily high water-bearing period, the remaining oil distribution is scattered, and the edge of the fault has become a favorable area for residual oil tapping. Special well designs such as high-angle wells are designed to be close to the fault, so it is important to finely characterize the three-dimensional spatial spread of the fault and pinpoint the spatial location of the fault. The well seismic based tectonic model splicing technique solves the drawbacks of the block tectonic model in the articulation area, and the seamless splicing of the tectonic model deepens the understanding of the overall tectonic features and plays an important role in the overall dredging work of the fault margin
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