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Wells - surface resistivity method to determine the boundary of the oil and gas reservoirs

Author: ZhangJiFeng
Tutor: FengBing
School: Chang'an University
Course: Earth Exploration and Information Technology
Keywords: Well - surface resistivity method Range of oil and gas reservoirs Finite Element FEPG Numerical Simulation
CLC: P618.130.8
Type: Master's thesis
Year: 2005
Downloads: 119
Quote: 2
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Abstract


Petroleum resources are the basis for the development of the national economy , accelerate the exploration and development of petroleum resources , improve drilling success rate , the desire of people dream of . In this paper, the use of the well - the resistivity method , by means of an oil well to determine the scope of oil and gas reservoirs . Well - surface resistivity method the powered electrode into the well , and the ground potential distribution of a measured electrical prospecting method . And terrestrial , of its underground uneven body more responsive the apparent resistivity difference between the target body by calculating the point of power , under powered △ ρ_s, to highlight the impact of oil and gas reservoirs . Firstly, according to the characteristics of oil and gas reservoirs , abstract geophysical model simulation of a the line power two-dimensional geoelectric model using the finite element software FEPG point of the the power field three-dimensional geoelectric model to analyze the impact of various factors on abnormal . Studied the depth of oil and gas reservoirs , the influence of the thickness and width of the surface potential and apparent resistivity ; the point power distance away from the reservoir , the reservoir and surrounding rock resistivity differences , the reservoir deviation from the drilling location as well as oil and gas reservoirs above abnormally affected by high impedance or low impedance strata of ground features; study of its variation with the diode device the apparent resistivity its gradient parameters , identify their quantitative relationship . The theoretical model analysis showed that well - surface resistivity method is a method of determining the level of oil and gas reservoir boundary effective method . Through the drilling of high impedance reservoir , can make is abnormal even more prominent ; with the △ ρ_s parameters in practical work , as far as possible to make a point current source close to the reservoir will be more obvious exception amplitude ; reservoir above high and low resistivity formations , through the reservoir below the power supply for the poor , a significant role in the weakening of the top of the high , low resistivity formation , prominent oil and gas reservoirs will obtain better results . Finally, through the flume tests to prove the effectiveness of the method .

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