Comprehensive Interpretation Of Non-seismic Geophysical In Oil And Gas Geological Survey

Relying on the Project, undertaken by the Institute of Geophysical andGeochemical Exploration CAGS, Oil and gas geological survey in themiddle-Cenozoic volcanic rock basins which is in the outside of the Songliaobasin(item number:1212010813072), based on the data of in the the wulangai basincollection and test petrophysical samples of rock and profile of gravity, magnetic andmagnetotelluric sounding, combined with regional geological, gravity, aeromagnetic,shallow drilling and logging,This article has studied petrophysical of rock andprocessed and explained non-seismic geophysical data in wulangai basin,using theadvanced processing method, The research has made main achievement andknowledge:1、 Carried out studies of physical properties of rock in the wulangai Basin. In thewulangai basin density, magnetic susceptibility and resistivity of layer and volcanicrocks,through specimen testing, physical property data collection and statisticalanalysis, have carried out petrophysical studies, analyzed the main density interface,the magnetic body and the low resistance layer of electrical signs; pointed out inwulangai basin the premise of physical properties of using non-seismic geophysicaltechniques to carry out the evaluation of the potential for oil and gas resources, to themain of gravity, magnetic, electrical non-seismic geophysical techniques can describethe depth of oil and gas target layer-Cretaceous Bayanhua group and Jurassicmorphology semi-quantitative and quantitative. These knowlege provide the basis forthe data of non-seismic geophysical.2、Explored the non-seismic geophysical technology in areas of low level of knowlege.Because of it, in the wulangai basin cover volcanic area is difficult to obtain goodresults, the lack of deep drilling, well logging and seismic data,present ideas of theway of specimen testing+logging data collection+shallow drilling+areaconstrained determine the geophysical model.and use different geophysical methodsand comprehensive analysis to determine the final geological interpretation model in order to reduce the uncertainty of the geophysical interpretation of the results.3、 Using the results inversion calculation achieved by gravity, magnetic, andmagnetotelluric, combined with regional geological data to develop an integratedresearch and given of the wulangai basin boundary, the depth of the target layer withoil and gas-Cretaceous Bayanhua group and the Mesozoic group,fracture distribution,rock distribution and spatial distribution characteristics and provide a strong basis forthe evaluation of the potential oil and gas resources of the basin.