Geological Modeling And Model Validation Based On Single Sand Body In Zhuang 52 Fault Block Of Wuhaozhuang Oil Field

Zhuang 52 Fault Block of Wuhaozhuang oil field is a structural-lithologic pool, and the target bed isⅠOil Group of Lower Es3 Reservoir, which is an important pay bed with a set of lake gravity flow turbidite fan sedimentary system. Gudao buried hill in the south and Changti buried hill in the east are the main source area. At present, the reservoir has entered into ultra-high water content. By analyzing the static and dynamic data of the reservoir, problems can be found in various aspects, such as interlayer distinct differences, imbalanced degree of reserve recovery, low single well productivity, low oil recovery rate, serious water flooded extent, a number of non-production and water-injection halted wells, long time of the well shutting, low injection-to-producing-well corresponding ratio and extremely uncompleted injection recovery, which increase the difficulty of the oil field development.Through fine dissection of lake gravity flow turbidite fan sedimentary system of theⅠOil Group of Lower Es3 Reservoir, systematic research of the space distribution of single sand body and single genetic sand body. Geological Modeling on single sand body is built based on this current research, which can provide reliable basis for digging of the remaining oil in work area. On the basis of drilling and core data, it is possible to recognize muddy intercalation, property intercalation, calcium intercalation and cutting plane, which consist of erosion interface of single genetic sand body, and build these well-logging characteristics. According to the analysis, there are seven types of superimposition correlation among single genetic sand body. Based on this current research, braided channel single genetic sand body, single genetic sand body between waterways, waterways side edge single genetic sand body and the leading edge waterways single genetic sand body of a small range are developed in the target layer of the study area. Subsequently analyze the section and plane feature of single genetic sand body and intercalations elaborately. Intercalations are classified into three types, which are stable type, second stable type and random type, in the light of the confine and drilling rate of intercalations.On the basis of elaborate geological interpretation, geological reservoir models are made to describe the structure of single genetic sand body. Utilize Fine structural interpretation and combination of wells and seismic to depict structural map which is for structural framework to establish an accurate model. On the basis of modeling method, stable type model and second stable intercalation model are made and random sequential indicator simulation is completed focused on the random intercalations in the single genetic sand body. Since well density of the study area is large and a fine geological understanding has been established, single genetic sand body model is determined. Applying the single sand body controlling principle, porosity parameters are taken into account for sequential Gaussian simulation, and porosity model acts as the second variable constraints on permeability parameters sequential Gaussian co-simulation. The models are conducted through thinning wells test and reservoir numerical simulation, whose results demonstrate that the geological models are of high precision.