Study On Saturation Model And Water Cut Evaluation Method Of Tight Sandstone

The fracture-cave carbonate reservoir is a kind of oil and gas reservoir mainly composed of secondary pores.The reservoir space is mainly composed of fractures,holes and caves with uneven distribution.The reservoir heterogeneity is strong,so it is difficult to evaluate and analyze the reservoir effectiveness of the fracture-cave carbonate reservoir.Conventional logging technology of detection range is often confined to the well near week,radial detection range is limited,the azimuth detection ability is poor,and developed based on array acoustic logging far detection imaging technology can be detected by the well several meters to tens of meters range of geological structure,can effectively broaden the scope of logging exploration,improve the ability of reservoir evaluation.Therefore,it is of great significance to carry out the research on the processing method of acoustic far-detection imaging and to use the multi-scale analysis method to analyze the reservoir effectiveness.At first,this paper studies the principle of measurement of the array acoustic log and sound waves far detection is mainly studied the basic principle of reflected wave imaging,explores the sound waves far steps: detecting imaging coordinate system transformation,waveform pretreatment,wave field separation,superp-osition of NMO correction and migration imaging,each step was studied in detail the principle and characteristics of data processing method,realize the detection and imaging data processing.Then,taking the ordovician carbonate strata of Tahe as the research object,the imaging data of dipole transverse wave were processed for the key exploration Wells in the research area,and the development of geological structure near the Wells was explained and analyzed.Then,the research on attribute extraction technology was carried out,and the attributes of the borehole seismic trace data and the remote detection imaging were analyzed,and the comparison and comprehensive interpretation of the borehole resistivity imaging logging and seismic trace imaging were carried out.Finally,combined with the test results and the above analysis,the validity analysis of the fractured and cavernous carbonate reservoir is carried out.Paper developed acoustic detection and imaging processing method,combining with borehole wall imaging,seismic attribute analysis,has realized the borehole wall,well,well different investigation depth of multi-scale integrated interpretation,reservoir completed the effectiveness analysis of the seam hole carbonate reservoir,effectiveness evaluation standard is established,for the carbonate reservoir evaluation provides new ideas,new methods and new technologies.