The Study Of Development Technology On Naturally Fractured Reservoir In High Watercut-H₂ Formation Of Huoshaoshan Oilfield As Example

Natural fractured reservoir is in the process of oil exploration and development of the most difficult types of reservoir. The ultimate oil recovery depends on the complexity of the reservoir. Oilfield waterflooding into the mature development state, fractured reservoir special reservoir flow conditions and the development of the reservoir arduous and complicated. Production performance of reservoir complex, the short duration of period of stabilized production, water breakthrough fast and production decline rapidly, wells production decline type complex, difficult oilfield development index forecast, forecast results to higher uncertainty; fractured reservoir development methods reasonable choice and reasonable injection, injection and production wells and injection-production network structure determination of the existence of greater difficulty; fractured reservoir matrix system in the remaining oil, leading to the eventual recovery of low reservoir engineers to a number of issues raised enormous challenge. The study take the H₂ formation Huoshaoshan Oilfield as example, to illustrate the system method and technology of how to development naturally fractured reservoir effectively, development of geology, reservoir stochastic modeling, the naturally fracture characterization and modeling, reservoir engineering, adaptability and the current pattern of remaining oil distribution and the study integrated harness are studied.Study fully digested and absorbed previous research results and knowledge, the method of high-resolution sequence stratigraphy principle and method is applied to optimize of H₂ formation rock strata partition scheme, in the sedimentary facies signs, rocks - electrical response relationship on the basis of research, H₂ establishment of the short-term cycles of microfacies distribution map; integrated core test, testing for oil data, in-depth studies of reservoir characterization, the well log fine interpretation is proceeded to obtain reservoir properties parameters (porosity, permeability, water saturation, etc.), application facies-control reservoir stochastic modeling techniques to establish the H₂ formation fine geological models(matrix). Description and Modeling fine naturally fractures is the focus of the research papers. Based on previous studies, by the observation of core fractures, fractures understand the characteristics and type of growth, combined with dynamic production, drilling engineering, and other information calibration imaging and conventional log data, in-depth study to the pair of measuring and other conventional logging response mechanism series of fractures developed on the basis of conventional logging - fractures in the response mode, the fractal dimension of technology is applied to identify wells fractures, evaluation of the current structural fracutres' distribution law using the mature and reliable technical methods (curvature structure, etc.), development of fractures forecast H₂ formation regional distribution, through the drilling and completion and production of a wide range of information dynamic contrast scale of the predicted results for quality control, finally, The method and technology of geostatistics is applied to establish H₂ formation entire reservoir of discrete fracture network(DFN). The production data of H₂ formation is collected and evaluate the production performance, the evaluation of waterflood development effective is Application of analogy interference test, numerical simulation methods are used to evaluate adaptability of current H₂ formation well pattern. Study indicate that optimization water injection structure alone, injection-production system is unable to fundamentally improve the development status. Well pattern infill and well injection and production wells net form of adjustment is imperative. Application of reservoir simulation technology on H₂ formation under the current status of the development of the remaining oil distribution of the controlling factors of the prediction. Integrated geology, the development of research results for H₂ formation of the existing problems and contradictions, and develop comprehensive management schemes.The paper takes H₂ formation, Ping Diquan Group Permian, Huoshaoshan oilfield as example, based on the development of natural fractures reservoir geological features, to resolve the oilfield waterflooding development of the problems and contradictions that exist for the purpose of the study, with computer technology as a means of closely around the "understanding residual oil, development residual oil" the core issue, integrated geological, logging, analysis of laboratory and reservoir engineering using reservoir evaluation integrated research ideas, combining static and dynamic, from qualitative to quantitative, mutual authentication, promote each other ,formed naturally fractured sandstone reservoir fine description, and the remaining oil distribution and development of methods for the exploration and development of similar reservoir provides exploratory research.