Reservoir Fracturing Geological Model Building And Application In Southern Songliao Basin H90 Block Fuyu Layer

The principle theory of sequence stratigraphy and high resolution sequence stratigraphy was used to formulate the formational sequence structure. Then the high resolution stratigraphic sequence division scheme was established and the equitime reservoir section was classified. Based on this restriction researches on basic reservoir evaluation geology can be executed. These include building of conceptual geological model on layers, structure, deposition and reservoir stratum. Then the prediction seismic reservoir model was built according to the basic geological instruction. Combing with the structural attitude、predicted sand distribution and producing testing results analysis on reservoir feathers and hydrocarbon distribution was carried out. Using the 3D structure interpretation results, the sedimentary context research results and well logging interpretation results as input, the focus block’s precise quantitative 3D reservoir model was established. According to the established model the sandstone layers and shell restraining barrier along with their distribution in the area can be determined. Thus the model can be used to instruct the horizontal well fracturing. Results and conclusions drawing in the research are as follows:1. The area’s 8 well tie correlation profile was interpreted and the whole area was finely match and divided. The block’s main pay zone was comprised with 4 sand body and can be divided into 12 sublayer. The thickness each subzone changes a little among the area this indicates the smooth and steady sedimentary in this area.2. Unified the format and units of the logging material in the block, and the interpret model of porocity, permeability and gas saturation was established. Especially the sensitive parameters on brittleness was calculated.3. Based on former research experience, the optimized parameter was correllated with the well sandbody. According to this the plane distribution of researvior feathers can be described. Along with the single well facies the precipitation microfacies in research area was depicted.4. Based on the 3D geologic model, comprehensive analysis on structure, sedimentary, reseavior and distribution of sandbody in horizontal plane and vertical was implemented. The real drilling log material of horizontal well identified the accuracy and precision of the model. Applying this model to fracturing desighn and operation, a new method using the 3D reservoir model to instruct engineering program was created.5. The geologic model can depict the sand extension of the area much more precise and can describe the sand body distribution in different periods. Also it can finely predict the development trend of sand and structure extension, which of course has significance on the horizontal placement and track design to increase hydrocarbon sand body encountered by the well bore.6. The model can determine which statement the well track intersect the sand body, which provide the technical staff with the prediction of the fracturing point, the fracture length and the fracture azimuth. In the meantime the model can precisely determined the shell barriers which helps design different fracturing scheme to fit the reservoir.