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Shale gas horizontal well continuous fluctuation type reservoir horizontal section geosteering trajectory control method

A resistivity, mixed liquid technology, applied in complex mathematical operations, earthwork drilling, wellbore/well components, etc., can solve the problems of not easy to use, long test cycle, difficult to simulate the situation of sewage reinjection, etc., to achieve accurate high sex effect

Active Publication Date: 2021-06-18
CHINA UNIV OF PETROLEUM (EAST CHINA) +2
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] This method uses injection water with a fixed salinity to mix with formation water, which is difficult to simulate the sewage reinjection situation in the actual reservoir water injection development, the experimental conditions are difficult to establish and the test period is long, it is not easy to use, and there are limitations in the experimental objects. Disadvantages of scale being different from reservoir scale

Method used

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  • Shale gas horizontal well continuous fluctuation type reservoir horizontal section geosteering trajectory control method
  • Shale gas horizontal well continuous fluctuation type reservoir horizontal section geosteering trajectory control method
  • Shale gas horizontal well continuous fluctuation type reservoir horizontal section geosteering trajectory control method

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Effect test

Embodiment 1

[0069] Example 1: T layer in KL Oilfield

[0070] The implementation process is described in detail below:

[0071] For the case where the water analysis test data of not less than 3 layers and the corresponding water production rate data are available, the method of estimating the resistivity of the mixed liquid using the inspection well data is specifically as in Scheme 1:

[0072] 1) The salinity of the formation mixed fluid in the single-layer water analysis test data collected in the inspection well is converted into the formation mixed fluid resistivity under the formation temperature condition, as shown in Table 1;

[0073] 2) Establish a model R with the collected single-layer water production rate and formation mixed fluid resistivity WZ =0.6183*F W +0.2567;R 2 = 0.7968.

[0074] Table 1 Collected single-layer water production rate and single-layer water analysis and laboratory data statistical table

[0075]

[0076]

[0077] Application effect:

[0078] ...

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Abstract

The invention discloses a shale gas horizontal well continuous fluctuation type reservoir horizontal section geosteering trajectory control method. Identification points are arranged at fluctuation change points of a top interface and a bottom interface of a target layer, an optimal trajectory control path is formed by combining an in-target point and an out-target point, the well deviation angle of the trajectory reaching the in-target point and the well deviation angle required by the front point reaching the rear point in each section are obtained by matching with corresponding formulas, and the geosteering trajectory control of the continuous fluctuation type reservoir horizontal section is realized. The control method is simple, the engineering curvature is optimized, the trajectory adjustment frequency is low, the drilling route is short, and the drilling quality and the drilling time are improved.

Description

technical field [0001] The present invention relates to petroleum logging evaluation technology, mainly based on the core analysis test data, water analysis test data, production dynamic (water production rate) data and well logging data of inspection wells to establish the statistical relationship between water production rate and formation mixed fluid resistivity, Finally, a method for estimating the resistivity of mixed liquid by using inspection well data is established. Background technique [0002] Most oilfields have entered the middle and late stages of development. For oilfields developed by water flooding, the key to tapping the potential of oilfields is to study the remaining oil saturation and enrichment areas. When using resistivity logging to quantitatively calculate remaining oil saturation, the resistivity of formation mixed fluid is the most critical parameter. [0003] There are mainly two methods for calculating the resistivity of formation mixed fluid in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/08G06F17/15
CPCE21B49/08G06F17/15
Inventor 韩学辉王鹏韩振鹏江佳洋柴立学
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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