Tahe Oilfield In BM Xiao Haizi Groups Reservoir Evaluation

The main research method of this paper is:according to the former drilling, logging, test and analysis, production dynamic data analysis and seismic data and petroleum geology, logging geology, reservoir engineering, as a theoretical guide to Tahe Oilfield BM (Bachu county and Mai Gaiti) areal groups reservoir Xiao Haizi forecast; And through the well earthquake fine calibration, the completion of the3d seismic data structure interpretation, the optimization of seismic attribute screening of reservoir prediction oiliness; The logging constraint inversion results on reservoir, tracking contrast, carries out the lithologic trap and description, finally, reservoir comprehensive evaluation and puts forward suggestions the well.The main research ideas:first of all, through to the Xian Bazha3d seismic data people-to-people explain analysis, in view of the Xiao Haizii group of carbonate reservoir, establish the response characteristics of reservoir changes in law; Second, according to explain the layer of the bits of data, the Xiao Haizi along the layer extraction of seismic attribute analysis, looking for oil and gas reservoir and attributes of the relationship between; Finally, according to the seismic interpretation model, and the logging constraint seismic inversion, explore various reservoir earthquake impedance relationship.The main research technology:with a different seismic inversion method, the study of seismic data inversion region, identify favorable lithology body; Based on the statistical well point place oiliness layer segment different logging response physical quantities, analyzes the reservoir characteristics; Use technology to rock chip analysis reservoir lithology and structure for qualitative analysis; The seismic attribute research, predict laminar to discriminate reservoir.The main research contents and main research results of this paper including the following six aspects:1、Through to the thesis topic source and the significance of research, combining Tahe Oilfield of reservoir evaluation research status from domestic and abroad, according to the southern Tahe Oilfield exploration and research status and existing problems, this paper expounds the thoughts and the research technical route, give the important research content. Using research area before drilling, logging, test and analysis, the dynamic material production and seismic data, conduct research area, and the structural characteristics of the reservoir characteristics of analysis and study. And respectively from the lithologic features, reservoir and reservoir characteristics, trap cover combination type characteristic, oil and gas accumulation conditions of research on features, the reservoir characteristics of Tahe Oilfield on fine description.2、In Tahe Oilfield, reservoir distribution characteristics, through to the region, the characteristics of structural evolution analysis, horizon calibration and structure interpretation, the completion of the fracture system, structure features and main structural trap analysis, and other aspects of the research work. And then the core observation, logging curves and the seismic data analysis and contrast, carry on comprehensive velocity analysis, and based on this, the calibration different lithology, electrical formation and characteristics of the seismic section of the reflection corresponding relation. And used various methods to enhance the accuracy of tectonic detailed interpretation of fault characteristics and trap features for research.3、Through the analysis of the seismic attribute, then the different seismic inversion method research area of seismic data inversion of the main application is sparse pulse inversion. Inversion is based on the pulse deconvolution on the basis of the recursive inversion method, the basic hypothesis of the formation is strong reflection coefficient is sparse distribution. This method is applicable to well number less area, the advantages of being able to get broadband take of reflection coefficient, better solve seismic inversion of multiple solution, thus making the inversion results tend to be more true. Which also involves non-ferrous inversion, the inversion method from the point of view of the algorithm actually belong to the frequency domain log constrained wave impedance inversion. It is the core technology with the earthquake frequency spectrum and well of the spectrum of the wave impedance matching to complete the inversion, the inversion method does not have the obvious wavelet extraction process, also do not need to initial model, vertical resolution than sparse pulse is high, but lower than the model inversion, because its objective, concise particularly suitable for reservoir dramatic changes in horizontal lithologic trap of prediction, and the fault, sedimentary reflects objectively, especially suitable for complicated for the lithology area.4、In the comprehensive research content above, and concludes that the Tahe Oilfield in BM Xiao Haizii groups reservoir geophysical response characteristics, effective reservoir prediction technology, reservoir favorable development of some conclusions and forecast with understanding, and make corresponding reservoir evaluation and puts forward Suggestions the well.5、Through this fine structure interpretation, reservoir prediction on the basis of the research work, and finally, in the study area evaluation25structural trap, among them, there are five lithologic trap,14structure trap, six tectonic lithology composite traps.6、In25structure and structural and lithologic trap, is used to make it better, including oil and gas traps11,11favorable structural trap figure, a total area of about110km2for them. In11favorable structural trap, and ultimately the most favorable evaluation traps7, area of about56km; They are:well BT6east trap, BT6well north trap, BT9well QU1trap, north east trap, QU1well well well BC1traps and south west traps and B1well south traps.