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A method for predicting water plugging potential of high water-cut horizontal wells

A prediction method and horizontal well technology, applied in prediction, data processing applications, instruments, etc., can solve the problems of long water search period, many water injection wells, and long verification period, etc., to achieve short water search cycle, easy implementation, and applicability strong effect

Active Publication Date: 2020-05-08
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The mechanical water search is controlled by the downhole switch, and the water search is produced section by section. However, with the increase in the number of horizontal well reconstruction sections, the water search cycle is longer
[0004] 2. Production logging mainly judges the fluid production and water content of each layer through the fluid production profile test, but the high cost, high wellbore requirements, and too small fluid production will affect the test results
[0005] 3. The dynamic verification of water injection wells is to track the water content of oil wells and judge the direction of water inflow by changing the working system of water injection wells. However, since there are many water injection wells corresponding to horizontal wells and the verification period is long, it is only applicable to fractured water breakthrough horizontal wells
[0006] 4. The dynamic monitoring method mainly uses water flooding front test and tracer monitoring to judge the direction of water inflow. However, due to the development of micro-fractures and heterogeneity in the reservoir, the relationship between fracture networks is complicated and it is difficult to judge the direction of water inflow. and higher cost

Method used

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  • A method for predicting water plugging potential of high water-cut horizontal wells
  • A method for predicting water plugging potential of high water-cut horizontal wells
  • A method for predicting water plugging potential of high water-cut horizontal wells

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Embodiment 1

[0028] Such as figure 2 As shown, a method for predicting the water plugging potential of a high water-cut horizontal well provided by an embodiment of the present invention includes the following steps:

[0029] Step 100; Collect dynamic parameters of well group and static parameters of oil well;

[0030] Step 200: Simulate the incoming water direction according to the dynamic parameters of the well group and the static parameters of the oil well;

[0031] Step 300: Using the fuzzy clustering method to analyze the reservoir parameters and reservoir stimulation parameters in the static parameters of the oil well to determine the water breakthrough position of the wellbore;

[0032] Step 400: Obtain a prediction result of water blocking potential according to the simulated incoming water direction and the identified wellbore water breakthrough position.

[0033] In step 300, the fuzzy clustering method is an existing method, which generally refers to constructing a fuzzy mat...

Embodiment 2

[0035] On the basis of Embodiment 1, the well group includes oil wells and water injection wells corresponding to the oil wells. Water injection wells refer to wells used to inject water into oil layers, and each oil well corresponds to 4 to 6 water injection wells.

[0036] The well group dynamic parameters include oil well production dynamic parameters and corresponding water injection well dynamic parameters. The dynamic production parameters of the oil well include production time, daily liquid production, daily oil production, and water cut. The dynamic parameters of the corresponding water injection well include water injection time, water injection volume, water injection pressure and the like.

[0037] The static parameters of the oil well include reservoir parameters, well pattern parameters, reservoir stimulation parameters and fluid PVT parameters.

[0038] The reservoir parameters include average oil layer thickness, average porosity, average permeability, water s...

Embodiment 3

[0041] On the basis of Embodiment 1, the specific steps of the step 200 are: divide the wellbore of the oil well into several sections, then input the dynamic parameters of the well group and the static parameters of the oil well in each section into the Eclipse numerical simulation software as input parameters, and simultaneously perform the numerical simulation in Eclipse The formation seepage parameters and flow parameters in the wellbore are input into the software to obtain the simulation result map of the water incoming direction, and the water incoming direction can be judged from the simulation result map.

[0042] Among them, the wellbore segmentation is mainly carried out according to the size design network of the well pattern of the water breakthrough well, production dynamic parameters, reservoir parameters and fluid PVT parameters and other data.

[0043] Wherein, the Eclipse numerical simulation software is a known software and will not be described in detail her...

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Abstract

The invention relates to the technical field of petroleum well logging, in particular to a high-water-cut horizontal well water plugging potential prediction method which includes the steps: 100 collecting well group dynamic parameters and oil well static parameters; 200 simulating a water incoming direction according to the well group dynamic parameters and the oil well static parameters; 300 analyzing reservoir parameters and reservoir reconstruction parameters in the oil well static parameters by a fuzzy clustering method to identify the water breakthrough position of a shaft; 400 analyzing whether the simulated water incoming direction is consistent with the identified water breakthrough position of the shaft or not to obtain water plugging potential prediction results. The water breakthrough rule of a horizontal well is simulated by analyzing the well group dynamic parameters and the oil well static parameters, the water incoming direction and the water breakthrough position of the horizontal well are pre-judged, a basis is provided for establishing water plugging measures of the horizontal well, and the method is short in water seeking period, high in applicability, easy to implement and low in cost.

Description

technical field [0001] The invention relates to the technical field of petroleum well logging, in particular to a method for predicting the water plugging potential of a horizontal well with high water content. Background technique [0002] figure 1 Shown is a schematic diagram of the current wellbore structure of a horizontal well. At present, the water breakthrough position of a horizontal well with high water cut (generally refers to a water content greater than 80%) is mainly judged by mechanical water search and production logging, and the direction of water inflow is mainly verified by dynamic verification of water injection wells. And dynamic monitoring means to determine, these methods have some shortcomings, not widely used. [0003] 1. The mechanical water search is controlled by the downhole switch, and the water search is produced section by section. However, with the increase in the number of horizontal well reconstruction sections, the water search cycle is lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02
Inventor 崔文昊吕亿明常莉静牛彩云王百朱洪征罗有刚李亚洲
Owner PETROCHINA CO LTD