Rock core water-containing analysis method

An analysis method and core technology, which is applied in the analysis of drilling and exploration cores, and in the field of core water analysis, can solve the problems of not being able to meet the needs of rapid on-site analysis, many supporting equipment, and long test periods, so as to improve the interpretation rate, use less, and The effect of easy operation

Inactive Publication Date: 2007-10-24
鲍云杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the many parameters required, many supporting equipment, complex process, and long test cycle, it cannot meet the needs of on-site rapid analysis.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment one: the rock core water content analysis method of the present invention adopts the following process steps:

[0029] Take a core sample from Well XX at a depth of 2100.5 meters 2cm 3 , after the core sample is crushed, a volume of 10cm is added to the test cylinder 3 Deionized water floods the core sample for efficient leaching of various ions. Fractured core samples are routine techniques. The test cylinder is a sealable container, which can be a general-purpose graduated cylinder or any other type of container.

[0030] 2. Seal the test cylinder and soak the core sample at room temperature for 24 hours; the test cylinder should be airtight to prevent inaccurate data caused by deionized water and various ion losses. The soaking time should not be too short, otherwise various ions will not be completely leached out, and the measured data will be unreliable. The longer the soaking time, the more complete the diffusion of various ions, but it is not neces...

Embodiment 2

[0046] Take a 2cm core sample from Well X at a depth of 2106.5 meters 3 , put in a 10cm 3 Soak in the test cylinder of deionized water for 48 hours. After measuring the conductivity, the relationship between conductivity and salinity is converted, and the calculated salinity is 50mg / L. It is known that the porosity of this sample is 15%, and the salinity of formation water is 6000mg / L.

[0047] Calculate the water saturation of the core according to the following formula:

[0048] S w =V 水 K 测 / (V 岩 K 地 φ)

[0049] =10×50 / (2×6000×15%)

[0050]= 27.78%.

[0051] That is, the water saturation of this sample is 27.78%, which is a low aquifer.

Embodiment 3

[0053] Take a 5cm core sample from Well Y at a depth of 1800.5 meters 3 , put in a 10cm 3 Soak in the test cylinder of deionized water for 24 hours. After measuring the conductivity, the relationship between conductivity and salinity is converted, and the calculated salinity is 100mg / L. It is known that the porosity of this sample is 10%, and the salinity of formation water is 10000mg / L.

[0054] Calculate the water saturation of the core according to the following formula:

[0055] S w =V 水 K 测 / (V 岩 K 地 φ)

[0056] =10×100 / (5×10000×10%)

[0057] = 20%.

[0058] That is, the water saturation of this sample is 20%, which is a low aquifer.

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Abstract

The invention relates to a rock core water-bearing analysis method, in particular to an analysis of drilling well exploration rock core, belonging to oil gas geological technical field. The method comprises that breaking a rock core sample to be arranged into a test barrel, adding deionized water into the test barrel to submerge the rock core sample, sealing the test barrel, immerging the sample at normal temperature, using a test machine to find the mineralization rate K of the immerge liquid. The invention uses conductivity detect technique, to simplify the analysis process via rock core water-bearing saturation analysis processes and calculation equation, to quickly obtain the water-bearing saturation via little devices, while the chemical agent has reduced consumption, non toxicity, non damage on operation, non special protection demand, and non environment pollution. And the invention has quick analysis, with only one device, simple calculation, non special demand on operation and worker, and the application for rock core water-bearing quick analysis at drilling site.

Description

technical field [0001] The invention relates to a method for analyzing the water content of rock cores, in particular to the analysis of rock cores for drilling and exploration, and belongs to the technical field of oil and gas geology. Background technique [0002] Core water analysis is very important first-hand information in geological exploration and drilling geological work. The mud logging operation at the drilling site is different from some operations and analysis methods in the laboratory, and it is almost required to be synchronized with the drilling speed in order to obtain effective analysis data. Based on this particularity and taking into account the convenience of operators, the water content analysis method of rock core must have the characteristics of easy operation and rapid analysis. [0003] At present, there are mainly water drop test method, distillation method, chromatography method and microwave method in core water analysis. [0004] The drip test...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/06G01N33/24
Inventor 鲍云杰
Owner 鲍云杰
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