Calcite dolomite porosity measuring method and apparatus

A measuring method and technology of measuring device, which are applied in the field of geological survey and can solve the problems of poor porosity prediction results and the like

Active Publication Date: 2016-06-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method and device for measuring the porosity of limestone dolomite, which is used to so

Method used

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  • Calcite dolomite porosity measuring method and apparatus
  • Calcite dolomite porosity measuring method and apparatus
  • Calcite dolomite porosity measuring method and apparatus

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0025] figure 1 It is a schematic flowchart of a method for measuring the porosity of lime dolomite provided by Embodiment 1 of the present invention. Such as figure 1 As shown, the porosity measurement method of lime dolomite includes the following steps:

[0026] 101. Obtain the dolomite content of the lime dolomite in the area to be measured.

[0027] Before obtaining the dolomite content of limestone dolomite in the area to be measured in step 101, it also includes:

[0028] Obtain relevant data of the area to be tested, including seismic data, logging data and core data.

[0029] Among them, the seismic data includes: angle-wise stacked data volume or pre-stack time migration data, and seismic horizons. Well logging data include basic well data, such as coordinates, well depth, core filling altitude, etc., geological stratification data, well logging curves such as compressional wave velocity, shear wave velocity, density, dolomite content curve, and logging interpret...

Embodiment 2

[0047] figure 2 It is a schematic flowchart of another lime dolomite porosity measurement method provided in Example 2 of the present invention. Such as figure 2 As shown, the porosity measurement method of lime dolomite includes the following steps:

[0048] 201. Obtain relevant materials of the region to be measured.

[0049] Wherein, the relevant data include seismic data, logging data and core data.

[0050] Among them, the seismic data includes: angle-wise stacked data volume or pre-stack time migration data, and seismic horizons. Well logging data include basic well data, such as coordinates, well depth, core filling altitude, etc., geological stratification data, well logging curves such as compressional wave velocity, shear wave velocity, density, dolomite content curve, and logging interpretation porosity curve, etc. Other cores and imaging logging data.

[0051] 202. Carry out petrophysical analysis based on well logging data and core data, and obtain the firs...

Embodiment 3

[0082] Figure 5 It is a schematic structural diagram of a lime dolomite porosity measurement device provided in Embodiment 3 of the present invention. Such as Figure 5 As shown, the lime dolomite porosity measurement device includes: an acquisition module 21 , a determination module 22 and a calculation module 23 .

[0083] Wherein, the obtaining module 21 is used to obtain the dolomite content of the lime dolomite in the region to be measured.

[0084]Specifically, before the acquisition module 21 acquires the dolomite content of the limestone dolomite in the area to be tested, relevant data of the area to be tested needs to be obtained, wherein the relevant data include seismic data, well logging data, and core data. Among them, the seismic data includes: angle-wise stacked data volume or pre-stack time migration data, and seismic horizons. Well logging data include basic well data, such as coordinates, well depth, core filling altitude, etc., geological stratification ...

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Abstract

The invention provides a calcite dolomite porosity measuring method and an apparatus. The calcite dolomite porosity measuring method comprises following steps: dolomite content of calcite dolomite in an area to be measured is acquired; it is determined that which target content area the acquired dolomite content belongs to; if the acquired dolomite content belongs to a first content area, the porosity of pure dolomite is taken as the porosity of calcite dolomite; if the acquired dolomite content belongs to a second content area, the porosity of pure limestone is taken as the porosity of calcite dolomite; and if the acquired dolomite content belongs to a third content area, the porosity of calcite dolomite is calculated based on the proportion of pure limestone porosity and pure dolomite porosity in the calcite dolomite porosity. According to the calcite dolomite porosity measuring method, the dolomite content of calcite dolomite is used for determining the relationship of calcite dolomite porosity with pure limestone porosity and pure dolomite porosity, the porosity of calcite dolomite is obtained based on the proportion of the pure limestone porosity and the pure dolomite porosity in the calcite dolomite porosity, and accuracy on prediction on calcite dolomite porosity is increased.

Description

technical field [0001] The invention relates to the field of geological survey, in particular to a method and device for measuring the porosity of lime dolomite. Background technique [0002] The porosity of rock and soil is an important index to determine oil and gas reserves. For the Lower Paleozoic carbonate rock series, the thickness of the Cambrian and Ordovician dolomite reaches 1560-1692m, and the exploration potential is huge. Among them, the lithology of the Middle-Lower Ordovician-Upper Cambrian strata is mainly limestone, dolomite, and limestone dolomite. Affected by the formation mechanism of pores and compaction, the deep layer is the dolomite and dolomite with a buried depth of more than 4000 meters. Limestone porosity varies greatly, and its petrophysical laws also vary greatly, especially in the transitional section between limestone and dolomite. How to predict the porosity of limestone dolomite is a difficult problem in dolomite exploration. [0003] The ...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01V1/28
Inventor 关宝珠陈永权董瑞霞徐彦龙李保华熊益学邓力萍赵飞亢茜严威王轩张艳秋郭晓燕孙玉善
Owner PETROCHINA CO LTD
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