Oil deposit inter-well dynamic connectivity inverting method

A connected and dynamic technology, applied in earthwork drilling, wellbore/well components, genetic models, etc., can solve problems such as high cost and difficult data preparation

Inactive Publication Date: 2010-06-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of high cost and difficult data preparation of conventional reservoir well connectivity research methods, and pr...

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  • Oil deposit inter-well dynamic connectivity inverting method
  • Oil deposit inter-well dynamic connectivity inverting method
  • Oil deposit inter-well dynamic connectivity inverting method

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0035] The inversion steps of dynamic connectivity between reservoir wells based on signal processing are shown in the appendix image 3 Shown, with the present invention in Lu 9 well area J 2 x 4 The field application of the oil reservoir is taken as an example to further illustrate the present invention.

[0036]Luliang Oilfield is located in the hinterland of the Gurbantunggut Desert in the hinterland of the Jungar Basin. The Lu 9 well area is located in the area around Well Lu 9 in the northwest of the Sanquan bulge of the Luliang Uplift. There are more than 10 faults developed in the work area, concentrated distribution On the north and south wings of the east-dipping end of the anticline structure in the Lu 9 well area. Xishanyao Formation J in Well Lu 9 area 2 x 4 The oil reservoir is an anticline sandstone oil reservoir with low saturation,...

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Abstract

The invention discloses an oil deposit inter-well dynamic connectivity inverting method. The oil deposit inter-well dynamic connectivity is obtained by adopting oil deposit injection and withdrawal dynamic data inverting based on signal processing technology. Firstly a multiple regression model of oil deposit inter-well dynamic connectivity is established, a first order linear system convolver is built according to the transmission characteristic of injectivity signal in oil deposit, the convolver is applied to pre-treatment on the injectivity signal, genetic algorithm is induced into optimization solution of inverting model, systematic training is carried out on parameters to be optimized, and inverting is carried out to obtain connectivity factor representing oil deposit inter-well dynamic connectivity and time constant representing time delay and attenuation properties of the injectivity signal. The invention has strong practicability and high universality, is mainly used for evaluating oil deposit inter-well dynamic connectivity and further guides oil-field development scheme formation and production optimization.

Description

technical field [0001] The invention relates to a method for evaluating the connectivity of oil reservoirs, in particular to a method for obtaining the dynamic connectivity between wells of oil reservoirs by inversion of dynamic data of injection and production of oil reservoirs. Background technique [0002] In oilfield development, reservoir connectivity is an important content of reservoir evaluation and an important parameter affecting oilfield development performance. Recognition of reservoir connectivity is of great significance for enhancing oil recovery from reservoirs. With the continuous development of the reservoir, the reservoir parameters have changed greatly, and the static connectivity can no longer accurately reflect the formation properties and reservoir fluid connectivity. Understanding the dynamic connectivity between wells and clarifying the flow direction of water injection wells can not only guide the optimization of process measures such as profile co...

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Application Information

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IPC IPC(8): E21B49/00G06N3/12
Inventor 侯健杜庆军刘业俊于波张言辉高达王传飞
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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