Fracturing Layer Selection Method Based on Sonic Logging Curve and Resistivity Logging Curve
A technology of resistivity logging and logging curve, which is applied in wellbore/well components, earthwork drilling, and fluid production, etc., can solve the problems of inapplicability, need, and high cost of analysis and testing, so as to reduce the cost of testing and ensure accuracy. rate, and the effect of ensuring detection accuracy
Inactive Publication Date: 2021-11-19
OIL & GAS SURVEY CGS
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Problems solved by technology
The disadvantage of this method is that the parameters after fracturing are required, and it is not applicable to the preliminary exploration area or the exploration area with few fracturing wells
The disadvantage of this method is that the core is drilled and the cost of analysis and testing is high.
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[0026] Such as figure 1 Shown, the present invention obtains acoustic wave curve by acoustic logging, obtains resistivity curve by resistivity logging, comprises the steps:
[0027] Step 1: Decompose the spectrum of the acoustic wave curve and the resistivity curve respectively to obtain the low-frequency component of the acoustic wave, the high-frequency component of the acoustic wave, the low-frequency component of the resistivity, and the high-frequency component of the resistivity;
[0028] Step 2: Synthesize the low-frequency acoustic wave curve and the high-frequency resistivity curve into a generalized acoustic wave curve;
[0029] Step 3: comparing the generalized sound wave curve synthesized in step 2 with the sound wave curve to generate an indication curve, that is, indication curve=generalized sound wave curve / sound wave curve;
[0030] Among them, the acoustic wave (time difference) curve (DT) and resistivity curve (RT) are obtained by conventional logging method...
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The invention relates to a method for fracturing layer selection based on acoustic logging curves and resistivity logging curves. Acoustic curves are obtained through acoustic logging, and resistivity curves are obtained through resistivity logging. The steps are as follows: Step 1: Spectrum decomposition is performed on the acoustic wave curve and the resistivity curve respectively to obtain the low-frequency component of the acoustic wave, the high-frequency component of the acoustic wave, the low-frequency component of the resistivity, and the high-frequency component of the resistivity; Step 2: Synthesize the low-frequency acoustic wave curve and the high-frequency resistivity curve into a generalized acoustic wave curve; Step 3: Comparing the generalized acoustic wave curve synthesized in step 2 with the acoustic wave curve to generate an indicating curve; Step 4: selecting the fracturing interval according to the indicating curve.
Description
technical field [0001] The invention relates to a method for fracturing layer selection based on acoustic logging curves and resistivity logging curves. Background technique [0002] Reservoir stimulation is an important measure for shale oil production increase, and oil well fracturing layer selection is an important technical means in reservoir stimulation. There are two main types of layer selection methods for conventional fracturing: [0003] The first type of method, mature exploration area, counts the laws of the fracturing effect of existing wells and the parameters affecting the fracturing effect, and selects the fracturing interval for the target well. For mature exploration areas, select the parameters affecting fracturing, such as current production, original and current reservoir pressure, well location, perforation information, well completion information, etc. Using the method of mathematical statistics, find out the law of productivity after fracturing and ...
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IPC IPC(8): E21B49/00E21B43/26
CPCE21B43/26E21B49/00
Inventor 徐兴友陈珊白静王建国陈俊吴鹏
Owner OIL & GAS SURVEY CGS