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A AVO Analysis Technique Applied to North Kendong Area

Author: ZhangXueFang
Tutor: ZhangJinLiang；WangJinZuo
School: Ocean University of China
Course: Geological Engineering
Keywords: Northeast of Reclamation Petrophysical Prestack angle gathers AVO attribute Hydrocarbon detection
CLC: P618.13
Type: Master's thesis
Year: 2009
Downloads: 180
Quote: 1
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Abstract


Chengdao Ken northeast belongs NNW - Zhuangxi - Long Beach - Gudong - buried hill drape Kendong tectonic zone, southern Upper Tertiary Guantao group drape above the Gudong Kendong buried hill, fluvial deposition. Upper Guantao Formation meandering river depositional system, 4,5 sand sets its main oil and gas bearing system. Ken northeast of oil and gas exploration and divided into three phases of exploration time and exploration purposes since 1987, is now in the third phase of the possession for looking the lithologic on the tectonic setting goals. Reservoirs of oil and gas after the surrounding rock between the wave impedance differential increase oil and gas production, mainly based on the strong amplitude reflection characteristics as a basis for drilling. Majority of the use of this method to deploy well successfully Ken East 34, Kendong 47, Kendong 481 and other wells in the target layer were high-yield oil and gas flow; but also some of the wells drilled dashed, such as Kendong 346, Kendong 482 , Kendong 82 drill water wells in the target layer layer. Defeat wells seismic reflection characteristics in the post-stack seismic profiles showed strong reflection amplitude characteristics and hydrocarbon layer is no different, post-stack seismic data on the the strong amplitude information may be related to the oil and gas, but may also be related to lithology changes can not be used to directly determine the oil and gas. The detected strong amplitude sand body petroliferous become the key to improve the success rate of exploration. In this paper, the the petrophysical theory as a guide, a comprehensive analysis of reservoir characteristics and with logging petrophysical analysis means that Ken northeast Museum on rocks for hydrocarbon detection using prestack physical basis; prestack angle gathers for a common letter noise than the problem of low solution stack and then rake angle gathers superimposed AVO inversion, AVO attribute processing and Museum on the the segment Ⅳ, Ⅴ sand group AVO attribute analysis results show that the shear wave impedance μρ data highlight the effects of lithology identification, Poisson's ratio and the far corner of the superposition of seismic data for oil and gas response sensitive. Oil and gas test results with the drilling results consistent rate of up to 93%. Simple, fast, and effective method has advantages in the far corner of the superposition of the seismic data on oil and gas detection, and promote the use of hydrocarbon detection can the shallow rivers phase Jiyang Depression; the AVO attribute summed up the application of technical processes to improve exploration success rate of development and the perfect subtle reservoirs in reservoir characterization technology has a positive effect.

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Fuel deposits > Oil, natural gas
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