Calibration method for fracture logging of reservoir

A logging and reservoir technology, applied in the field of petroleum exploration, to achieve the effect of reducing the cost of early data processing, high profit, and reducing work risks and costs

Active Publication Date: 2012-10-24
恒泰艾普集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects in the prior art, the present invention solves the problem of reservoir fracture density calibration in well logging

Method used

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  • Calibration method for fracture logging of reservoir
  • Calibration method for fracture logging of reservoir
  • Calibration method for fracture logging of reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] figure 1 is a schematic diagram of a method for calibrating well logging reservoir fractures of the present invention, the method comprising the following steps:

[0027] S101: collecting well logging data and seismic data;

[0028] In this step, the logging data and seismic data in the work area are received, the characteristic parameters of the logging fractures are obtained according to the interpretation of the logging data, and the fracture density is predicted according to the seismic data; specifically, it can be realized through the following steps:

[0029] First of all, two types of data are collected on the logging in the same work area, one is logging data and the other is seismic data. Among them, logging data can be obtained directly through logging survey, and seismic data can be collected through wellside seismic data give fulfillment. For the well logging data, the characteristic parameters of well logging fractures can be obtained through well loggin...

Embodiment approach

[0036] It is a method of determining effective reservoir fractures of the present invention when it is used in the detection of carbonate rock fractures and caves in a certain block of Tarim Oilfield: it specifically includes the following steps:

[0037] S201: Obtain multiple effective depths; firstly, analyze the logging data, and determine the level of fractures according to conventional logging and FMI logging techniques, such as figure 2 It can be seen from the FMI image that the depth position of fractures dense or well-developed is 21, which corresponds to the logging data at the same depth, so that the porosity of the fractures at the same depth is 0.65%. And according to this parameter, the effective porosity of fracture level I is determined to be 0.65%, and the limited porosity range is greater than 0.3%. Or the level of fractures can be divided by the intersection of porosity PHIE (%) and deep-dive resistivity RLLD (ohmm) data ( Figure 4 ) By establishing a two-...

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Abstract

The invention discloses a calibration method for fracture logging of the reservoir. The calibration method comprises the following steps of: receiving logging data and earthquake data in a working area, obtaining characteristic parameters of logged fractures according to the explanation of the logging data, and predicting the fracture density according to the earthquake data; carrying out interaction on the characteristic parameters of logged fractures and the predicted fracture density of earthquake to obtain a two-dimensional interaction diagram; and in the two-dimensional interaction diagram, dividing the level intervals of the predicted fracture density of earthquake by the level intervals of the characteristic parameters of the logged fractures, and calibrating the predicted fracture density of earthquake according to the level intervals of the logged fractures. The calibration method disclosed by the invention has the beneficial effects that the problems of the reservoir fractures and effective fractures is solved; and by logging calibration of predicted fracture density of earthquake, the effective fractures are easily recognized in practical work, and the working risk and the cost are further reduced, so that the earlier-stage data processing cost of the study on the fractures of the fracture-vug type reservoir is reduced and higher profit is obtained.

Description

technical field [0001] The invention relates to the field of petroleum exploration and is applied to reservoir prediction technology, in particular to a reservoir fracture logging calibration method. Background technique [0002] With the development and utilization of oil and gas resources, the reserves of conventional porous oil and gas reservoirs are decreasing day by day, and the difficulty of development is gradually increasing. Fractures, as oil and gas storage places, have attracted the attention of many petroleum workers. Fractured reservoirs refer to fractures as the main place, and the research on reservoirs has gradually developed from conventional porous reservoirs to other types of reservoirs, especially fractured reservoirs with storage spaces and seepage channels. According to the study of reservoirs, there is a geological structure with dispersed and interconnected isolated pores in the reservoir, which increases the effective porosity and has high permeabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40
Inventor 张志让孙庚文杨绍国邓林秦钢平汤金彪
Owner 恒泰艾普集团股份有限公司
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