The Application Of FMI Electric Imaging Logging Technology In The Study Of Lithologic Facies Of Yingshan Formation In The Middle 43 Well Area

The application of electric imaging logging, conventional logging, core slice data, under the guidance of the theory of paleontology and historical geology, sedimentary petrology, logging geology, tectonic geology and sedimentary rocks and sedimentary facies, the article were divided the imaging logging in Tazhong area of Tarim Basin in Middle Ordovician Yingshan formation carbonate rocks of Zhonggu 43 well area and revised accordingly to the redefinition of the Ordovician carbonate rocks, and identify the stratigraphic boundaries of the study area part of wells, the imaging logging in carbonate rock lithology and lithofacies of phase response characteristic chart interpretation, comparison of single well coring lithology and its corresponding depth imaging logging summarize the characteristics, identification of lithology and lithofacies, lithology and lithofacies using electro imaging logging relatively not coring well divide, solution Release and revision, the establishment of study area of Yingshan formation depositional model and sedimentary facies in the study area aspect to the development characteristics and plane distribution characteristics analysis.On the basis of electric imaging logging, conventional logging and core slice data in yingshan group, and established the stratigraphic boundaries of the electric imaging logging comprehensive identification marks. Zhonggu 43 well area middle ordovician in yingshan group of the characteristics under the conditions of the boundary surface GR values fall or abnormal high value, RT value increases, the electric imaging logging facies by conductive thin layer of the high resistance of thick layer of phase change. Using the stratigraphic classification basis of 17 Wells in the study area the original layered review result set, nine Wells stratigraphic boundary has obvious changes, line range 2.06.0 m, correct rate reached 52.9%.The imaging logging lithology and lithofacies phase response characteristic is calcarenite for high resistivity thick layers of phase 45.04%(F22), low resistance calsilutites parallel lamellar phase 32.74%(F23) and dark spots (F72) 22.18%.The discrimination of imaging logging of the high-energy sandy beach subfacies is the high resistivity thick lamellar phase (F22)+dark spots (F72)+low resistance and deformation of the layered phase (F51)+high resistivity bulk phase (F12). The recognition of imaging logging of the middle-low energy psammitic beach subfacies is dark spots (F72)+low resistivity thin layer shaped phase (F23) +high resistivity bulk phase (F12); imaging logging the interbank sea subfacies identification for low resistivity thin layer shaped phase (F23)+dark spots (F72).Applying the electric imaging logging changes characteristics of lithology and lithofacies, the article reinterprete and amend the lithology-lithofacies, and reinterprete the gamma value of high and large sets of lithology beach body. Hold the view that the Zhonggu 43 well area is in the open platform sedimentary environment, with the main subfacies is intraplatform and Scattered interbank sea subfacies.the direction of the intraplatform is the same with Tazhong-1 slope break, NW-SE direction, Between the intraplatform there scattered interbank sea and its direction is the same with the intraplatform. In the vertical combination of features is a large set of thick layer of Intraplatform in multiple superimposed and thin interbank sea, In the Horizontal,the intraplatform has big thickness, wide distribution, good continuity, large scale, so it has a good contrast, the relatively low energy interbank sea deposite and distribute to be isolated.