| Seismic Technique of Reservoir Prediction is one of the core technology of oil and gas exploration and development. Seismic reservoir prediction is mainly based on the analysis of the corresponding changes of the seismic reflection, refraction, wave, wave velocity, frequency, amplitude and phase caused by reservoir lithology, physical properties and reservoir filling fluid properties of the spatial variationto predict the distribution of reservoir rocks, reservoir characteristics and so on. Seismic reservoir prediction technology is an important means of lithological, stratigraphic reservoirs and other types of reservoirs such as reservoir construction, which constructed a complex reservoir lithology.This paper is based on the fine structural interpretation, seismic reservoir prediction, fine sand portrayed favorably of Nanyang oil field. Thesis research ideas:the study area for water distribution reservoir complexity, on the basis of stratigraphic correlation and fine structure interpretation on the use of stratigraphic sections, combined with the spatial distribution characteristics of sand bodies and the denudation line, the use of acoustic impedance inversion and lithology prediction technology, reservoir fine description, binding studies of hydrocarbon accumulation in the study area and the accumulation mode to kill your group strata exploration prospects prediction and evaluation. After a year of study, my study has finished the following work:1) In the research area, we have sorted and completed more than 300 wells logs and hierarchical data and 298 wells synthetic seismogram.We have explained the seismic interpretation horizon layer 9,completed the 20×20 encryption interpretion, an area of 1100Km2, important area reached 1×12) My study has completed a total of Neogene Shawan top and bottom of each interval TO diagram, structure diagram, a total thickness of FIG 24, Neogene Tacitus River Formation ground.We have figured out a TO diagram3)I have collected and organized well logs and drilling datadata of 300 wells.For each interval of sandstone, mudstone statistics,I figure out seven maps,3 time-depth conversion diagram, a correction formula.I had extracted each interval Shawan rms amplitude attribute, the effective bandwidth when the properties and half-life energy properties, a total of 21 properties..4)I have used Jason inversion software and calculated three inversion data,8 sand body contours, a comparison diagram of inversion sandstone and sandstone Inoue.5) Seismic fine structural interpretation results, combined with testing data, attribute analysis, inversion results and other information N1s1-T2 is preferably a small group as the exploration potential of sand layer, I had completed a comprehensive evaluation diagram.After a year of research, I have got the following results:1、The study area is located at Che Paizi,which adjacent to Xiaoguaihe Redshanzui oil field. Car Paizi is located in the northwestern margin of junggar basin, the tectonic on wooden trunk with a Hong Che fault zone belongs to the western junggar basin uplift of first-order tectonic units, east of the Hong Che fault zone is bounded into the turn changji sag and the bulge, the south sag and Elaine black bill root for four tree hill, west and northwest of Zaire mountain, the north and g-summer fault fold belt.2、The sand group of Sha Wan in the study area mainly developed braided river, braided river delta-lake sedimentary system, reservoir performance is good, oil source sag from four tree Jurassic with Ann set of oil, of the HaiHe river group of light oil filling period should be 5 ma Sha Wan group today. Jurassic oil mixed with Ann set of haihe river group of oil source, migration along shawan group at the bottom of the unconformity to Che Paizi, due to the better preservation conditions, formation of light oil reservoir.3、In research area, I have made a conclusion on the basis of rock physics of target interval statistics:research in sand shale wave impedance obvious distinction between wave impedance is greater than the mudstone and sandstone wave impedance, the original log data on wave impedance values increase with the increase of purpose layer buried depth. After depth calibration, wave impedance value fluctuation due to the normal range and a fixed threshold to distinguish between sand and mud lithology.4、Before I make the 3D seismic interpretation and wave impedance inversion, I have analysed 3D seismic data in the area of study on seismic data quality,and make a final conclusion:on the seismic profile, top-down seismic data in frequency is reduced, but the Line direction within the scope of the frequency of seismic data and Trace the same time also is not the same, on horizontal plane, I have obtained by extraction properties contrast, within the scope of the study area center high signal-to-noise ratio of seismic data, and the study area boundary at the end of the signal-to-noise ratio of seismic data, shows that internal accord with 3D seismic data in the study area and wave impedance inversion of seismic data interpretation.5、By maping the seismic reflection map layers of structure, I have got the result:fine structure interpretation can get from the structure, the overall form reflector are bottom from north to south, fracture development, mainly in the north6、Through the understanding of regional geological survey in the study area, the study area neogene shawan formation of steep slope at the northwestern margin of junggar basin, the same target layer buried depth of time difference to 1000 ms.7、Lithology prediction:based on the logging curve analysis, wave impedance study area increases with the increase of purpose layer depth, through extracted from well logging curve error numerical correction formula, and synthesis of the rock physics statistical results for correction, will be able to distinguish between sand and mudstone fixed gate value, when the lithology prediction, wave impedance of the body, after the depth correction applied statistical threshold is worth to sand mud rock. |
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