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Method of building influence plate on horizontal well production effect by crack and well trajectory angle

A production effect and establishment method technology, applied in wellbore/well components, earthwork drilling, production fluid, etc., can solve problems such as difficulty in determining stress and difficulty in predicting production effect of horizontal wells

Inactive Publication Date: 2017-02-15
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

With the widespread application of Sinopec horizontal wells since the "Eleventh Five-Year Plan", the operating rate of horizontal wells is basically stable at about 89%. According to field practice, due to the difficulty in determining the stress in the work area, generally speaking, the fracturing fractures and the well trajectory are in a very different shape. Orthogonal situation, which makes it difficult to predict the production effect of horizontal wells

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  • Method of building influence plate on horizontal well production effect by crack and well trajectory angle
  • Method of building influence plate on horizontal well production effect by crack and well trajectory angle
  • Method of building influence plate on horizontal well production effect by crack and well trajectory angle

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Embodiment Construction

[0021] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0022] Such as figure 1 as shown, figure 1 It is a flow chart of the method for establishing a chart of the influence of the included angle between the fracture and the well trajectory on the production effect of the horizontal well in the present invention.

[0023] In step 101, the limit oil drainage radius is calculated by using the permeability of the target layer in the block, and the work area whose length is the horizontal well length + 2 times the limit oil drainage radius and whose width is the fracture length + 2 times the limit oil drainage radius is determined. The formula for calculating the limit oil drainage radius is:

[0024] r 极限 =3.226×(P e -P w )×(K / μ) 0.5992

[0025] r 极限 —Technical limit well spacing, m;

[0026] P e —Or...

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Abstract

The invention provides a method of building an influence plate on the horizontal well production effect by a crack and well trajectory angle; the method comprises the following steps: 1, using a limit draining radius to determine a work area scope; 2, interpolating production well point permeability in the work area scope so as to obtain a permeability distribution map in the work area scope; 3, calculating a production power under a fractured crack and well trajectory quadrature condition; 4, changing the fractured crack and well trajectory angle, and comparing the production power with the quadrature condition; 5, zero dimensioning the crack, and building the influence plate on the horizontal well production effect by the crack and well trajectory angle under three conditions in which a no dimension seam is =1, >1 and <1. The method is developed for the oil field disposition fracture horizontal well; when the fracture crack and the well trajectory direction form different angles under the fracture crack and the well trajectory direction nonopiate conditions, the method can predict the influence plate on the horizontal well production effect by the angle.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for establishing a chart of the influence of the angle between a fracture and a well trajectory on the production effect of a horizontal well. Background technique [0002] With the domestic horizontal well technology becoming more and more perfect, horizontal well has become an important means to increase single well productivity, increase reserve utilization rate, increase recovery rate, and improve economic benefits. At present, the application of horizontal wells basically covers all types of oil and gas reservoirs, and is widely used in various oil and gas reservoirs such as heavy oil, fault block, low permeability, and complex lithology. Marginal reservoirs such as oil and ultra-heavy oil can be effectively developed by using horizontal wells. With the widespread application of Sinopec horizontal wells since the "Eleventh Five-Year Plan", the operatin...

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Application Information

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IPC IPC(8): E21B43/26
Inventor 陈辉曹小朋郭迎春任允鹏吕广忠张传宝牛祥玉贾艳平刘晓艳李超李景梅孙秀芝邓宏玲
Owner CHINA PETROLEUM & CHEM CORP
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