Study On Reservoir Sandwich With Fuyu Reservoir In Fu-Xin Uplift Zone

Now new oilfield ? blocks enters the development stage of high water cut.Remaining oil distribution is very complex.In order to meet the needs of oilfield development and production,it is necessary to study the growth situation of the block layer and interlayer insulation.In this paper,the research is based on ? block reservoir sandwich of Fuyu Reservoir in Fu-Xin Uplift Zone.According to the geological characteristics of the region,guided by the sequence of geology and seismic data,combining well logging,drilling and other geological data as the foundation,it has carried on the observation of coring well,data analysis of well logging curve,and relevant research on Fuyu reservoir facies and subfacies.Next log phase mode is established.By carrying out the analysis of the single well phase of the coring well,identify the Fuyu reservoir as the delta sedimentary system which is divided into 14 small layers,and among them the first layer to the third layer are delta front subfacies,others(from fourth layer to the eleventh layer)are delta plain subfacies.Based on research of sedimentary microfacies of Fuyu reservoir,the paper mainly studies the distribution of interlayer insulation.At first,standardize the logging data to eliminate the effect of non-stratigraphic factors on the raw material.Then,carry out electrical and physical analysis of rock formations with different genetic conditions and different lithology to make sure that Fuyu reservoir interlayer is mainly divided into two categories:argillaceous interlayer insulation and physical isolation interlayer.Moreover,respectively identify these two compartments in terms of qualitative and quantitative aspects.In the end,Research on the cross-sectional study of the entire study area's interlayer to analyze the influence of sedimentary environment on the interlayer,determine the calculating method of the thickness of the barrier and the layer,plot the graphs of frequency distribution,distribution density map,planar distribution and profile distribution of intercalation layer.Because there is less Fuyu reservoir fault,besides the south and the north are lower,the middle is higher,and not develop well,the interlayer is less affected by the geological structure.However,sedimentary relative insulation has a large effect on the interlayer,the identification of the interlayer is consistent with the distribution of the channel.