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Method for determining litho-electric parameters

A technology of parameters and rock electricity, which is applied in the field of determining rock electricity parameters, can solve the problems of long-term cycle, long experiment cycle, rock electricity parameters can not be served in time and meet the actual production, and achieve good application effect

Active Publication Date: 2010-06-09
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Description
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AI Technical Summary

Benefits of technology

This technology allows for quicker and more precise computation than current methods by allowing researchers to test different rocks with specific electrical properties before actually producing them.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the accuracy and efficiency of oil drilling operations during hydrocarbon exploitation techniques such as hydraulic fracturing. Specifically, current methods require complete saturaence from all parts of the borehole before any measurements may take place on these partially filled areas. Additionally, existing methods have limitations when measuring electrical properties at lower levels than those required due to their slow response times.

Method used

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  • Method for determining litho-electric parameters
  • Method for determining litho-electric parameters

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Embodiment Construction

[0025] Detailed description below in conjunction with accompanying drawings.

[0026] The present invention the present invention adopts following steps to realize:

[0027] 1) Select a series of cores in the measurement area that can represent the geological characteristics of the area, conduct experiments and calculations to obtain the porosity φ and permeability K of the cores;

[0028] Select 77 core samples, conduct experiments and calculate the porosity φ and permeability K of each core according to the standard procedure of "Core Analysis Methods (SY / T 5336-2006)".

[0029] The experiments and calculations described in step 1) are carried out according to the standard procedure of "Core Analysis Methods (SY / T 5336-2006)", the core porosity φ is a percentage, and the permeability K is a decimal.

[0030] 2) measure step 1) the NMR T of the described series of rock cores 2 spectrum

[0031] Get the NMR T of each core 2 Spectral amplitude value and its corresponding sa...

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Abstract

The invention relates to the technical field of petroleum well logging, in particular to a method for determining litho-electric parameters, which comprises the following steps: 1), collecting a serial rock core of a measured area to conduct a test to calculate the porosity Phi and permeability K of the rock core; measuring a nuclear magnetism T2 spectrum amplitude value of the rock core collected by the step 1) and a corresponding sampling time value T2i of the nuclear magnetism T2 spectrum amplitude value; converting the porosity Phi of the rock core obtained by step 1) and the corresponding T2i spectrum amplitude value of the T2i time value obtained by step 2) into the corresponding porosity Phii of the T2 spectrum amplitude value; and calculating a bond index m and a saturation exponent n. The method of the invention can accurately and quickly obtain the m value and the n value, overcomes the difficulty that an experiment cannot be performed to calculate the litho-electric parameters in a laboratory according to a standard flow in a relatively short time, can timely meet requirements of practical production and has a relatively good application result.

Description

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Claims

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Application Information

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Owner BC P INC CHINA NAT PETROLEUM CORP
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