Study Of The Fine Reservoir Description And The Rule Of Remining Oil Of The ES3 Reservoir Of Panhe Faults In Linpan Oilfield

The Es3 of Panhe faults Linpan oilfield is a typically complicate fault block heavy hydrocarbon reservoir. After more than thirty years development, it has entered high water-cut developing stage. At present, the main contradiction discovered during the development and the geological problems needed to be resolved require urgently using fine reservoir description technology to construct reservoir geological model of present-day condition, study residual oil distribution feature for guiding the development and keeping the stable production .Fine reservoir description and the study of residual oil was made for the main development oil reservoir of Es3 formation in the paper by studying stratigraphy fine correlation microstructure depositional facies> reservoir micro- and macro-heterogeneity characteristics, flow unit residual oil distribution etc, the fine model of the. reservoir has been made ; the rule of the remaining oil has been studied based on the data of the production, reservoir description - the ministor data, the study of the log of the remaining oil; based on the charactor, the regulation of the displacement ofoil by water in the normal heavy oilreseroir and the rule of sanding is studied good results have been achieved as follows:l.Fine stratigraphy correlation has been made in high resolution sequence and correlation framework has been constructed in the project, study of band has been stressed ,13 single sandstone body was fonnd than before.2.High resolution construction and Micro-structure study has been performed and construction framework is made clearly, one oil-bearing block ,pan 45 is founded. Three type micro-structures have been summarized The positive microstructures , such as little high point and little structural nose ,are good for the off-take well's production and the distribution of remaining oil.3.Various depositional marks have been comprehensively analyzed and depositional environment has been determined. Six microfacies have been classified by single well facies study, land horizontal microfacies distribution ,subaqueous branch channel an playa faces mainly, have been analyzed.4.study the explain of log explanation by the geologic preengage ,build up the model ofthe log explanation, the technique of waterflooded reservoir explanation and assessment is studied , the reserves is recalculated .5.Microcharacter and heterogeneous character have been studied by the use of the core of rock and the explanation of log . The normal intergranular pore-space is the main space for oil to store and can be divided into three types , reservoir with high pore and high permeability and reservoir with high pore and medium permeability are the main reservoirs. In situ layer,interlayer and horizontal permeability vary greatly and are seriously heterogeneouse through macroheterogeneity study.6.The regular of displacement of normal heavy oil by water flow and the mechanism of sanding indoors have been performed ,it's concluded that more than two thirds commercial reserves will be produced in the period of high cut. Higher intensite of water injection or produced intensity of oil can improve oil-water displacement efficiency. 2.5-3.OMPa is the most reasonable drawdown.7. Residual oil distribution has been determined based on the numerical model .remaining crude saturation log , comprehensive analyse of oil field engineering. On flat, remaining crude saturation mainly distributes nearly the faults or at the top to microconstruction ; horizontally, main layers is the flooded strata ,but there are more quantity of remaining recoverable oil; It is thought that low permeable interval of various rhythm layers is the enrichment interval of the residual oil.8. The comprehensive study results have been used on the off-take well on time, remaining crude near the faults is producing by orientational well and horizontal well; By the flood pattern modification, off-take wells which have not produced for a long time is reopened ; The adjustments have leaded to that the oil field has hold on stabilized production , the an...