| Ordos Basin is located in the north sector in China.which is a very distinctive, complex, compelling super large sedimentary basin, the development of which is not only a very good reservoir-cap type, but also has a lot of oil and gas resources, is one of the key oil and gas fields of mining blocks.in china.In Suligemiao blocks of China,Sulige gas field is a super large gas field which has been discovered in the world, it made a great contribution that let’s at least more than one billion Chinese people who can use the clean natural gas. Sulige gas field is loved and hated.Love is that it has "inexhaustible" oil and gas,at the same time,we hate it because of that it has ultra-low porosity,ultra-low abundance, low capacity, low permeability in the all oilfields on the entire planet, Which cause it is one of most difficult to development as the world’s largest gas field. In order to achieve the Sulige gas field development effect of the high-performance, field researchers continue to innovate and successfully developed a new temporary plugging drilling fluid technology, and to carry out large-scale application of air drilling, PDC drill bits, slim hole drilling and other new technologies. Effective protection of the environment has been taken to avoid contamination, reducing the cost of production inputs. In order to facilitate fast and accurate identification within the reservoir characteristics of the various fluids, researchers used advanced logging technology, developed a low porosity suitable for Sulige gas field, low permeability, low resistance gas reservoir log interpretation template. Currently, the Sulige gas field construction has entered a new era of modernization, the "modular construction, standardized design, digital management," a new mode of construction, set off a revolution in the history of China’s oil and gas fields, and laid a solid for the world oil and gas exploitation basis.Sulige gas filed,As the study area of the research.which make full use of the deposition, petrology, sequence stratigraphy, structural geology, seismic stratigraphy, the use of a large number of cores,well logging and seismic data, is to study the Gas reservoirs. Signs of lithology, sedimentary structures, paleontology flag, particle size characteristics, logging facies and seismic facies characteristics is to infer the depositional environment. Collection, analysis and collate existing regional tectonic, sedimentary facies and reservoir distribution, exploration and development of research and geological and logging, seismic, laboratory analysis and other information, increase static of the dynamic database. Based on the fine stratigraphic correlation,the use of three-dimensional seismic technique for elaborate explanation, the fine structure study. Using core, cuttings, well logs, and high-resolution three-dimensional seismic data using deposition theory sedimentary microfacies study, analysis of the distribution of sand bodies in three-dimensional space, the establishment of research work area deposition mode, and the study of sedimentary microfacies. Using core analysis data, combined with logging data, to carry out the study of the distribution pattern of reservoir and its physical properties, to predict the distribution of reservoir and its physical parameters. The ultimate goal is to improve Extensions tapping the potential on the fine interpretation on the basis of division and correlation in a small layer, the sedimentary microfacies research and seismic data, the implementation of the reservoir distribution rule, and established micro and macro reservoir evaluation parameters of the standard of Sulige gas field area 48 Su 8 section.(1) the use of high-resolution sequence stratigraphy method, and logs data volume, fine stratigraphic division and correlation in the petrel2010. Conclusion:Su 48 blocks long cycle 8 segment is divided into 8 upper case, lower case, etc.8 two mid-cycle, and the box is divided into 881 cartridge, the cartridge 82; 8 lower case divided into 8 boxes of 1,2 under box 8, a total of four short-term cycles. The implementation of the 212 single-well stratigraphic units divide the data that the gas field area classification scheme more reliable, relevant maps prepared formation 19;(2) defined the Soviet zone box 8 of 48 sedimentary environment braided river delta sedimentary facies, braided river delta plain with respect to the front sub-facies, box 8 segment into a lake, the sand bodies retrogradation evolution mode, completed the division of the backbone sectional 37 single well sedimentary microfacies, sedimentary microfacies complete the preparation of relevant maps 9;(3) Su 48 block development is relatively rare rock types, specifically the following two kinds:first lithic quartz sandstone, quartz sandstone and lithic sandstone second, the former development-oriented; reservoir space is varied, with intergranular dissolved pore, residual intergranular pore, kaolinite intercrystalline pores, micro-cracks; the study area is fine-micropores,-fine throat, is a low porosity and low permeability; on the basis of clear reservoir physical properties and characteristics of heterogeneity, the preparation of the relevant maps reservoir horizontal distribution maps and heterogeneity plane distribution member 35;(4) the establishment of the Soviet zone box 8 of 48 micro and macro reservoir evaluation parameters of the standard of formation at all levels.8 cartridge reservoir evaluation were classified, the conclusion is:Box 8 Upper Reservoir poorly developed, box 8 lower reservoir upper section 8 than the box better reservoir development, and focus on the point of view of the work area from the plane of the Midwest, the preparation of reservoir classification maps 5;... |
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