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Well pattern spacing method of triangular horizontal well

A horizontal well, triangular technology, applied in wellbore/well components, earthwork drilling, production of fluids, etc., can solve the problems of fractured water flooding and large initial decline, reduce initial decline, improve single well production, reduce Effects of Fracture Flood Risk

Active Publication Date: 2016-08-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the existing problems of horizontal well pattern fracture water flooding and large initial decline

Method used

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  • Well pattern spacing method of triangular horizontal well
  • Well pattern spacing method of triangular horizontal well
  • Well pattern spacing method of triangular horizontal well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, the triangular horizontal well pattern well layout method includes the following steps,

[0031] Step 1, select six parallel first horizontal well A, second horizontal well B, third horizontal well C, fourth horizontal well D, fifth horizontal well E, sixth horizontal well F, fourth horizontal well D The first horizontal well A is located in the same column and coaxial, the fifth horizontal well E and the second horizontal well B are located in the same column and coaxial, the sixth horizontal well F and the third horizontal well C are located in the same column and coaxial,

[0032] The third water injection well Z is located between the second horizontal well B and the fifth horizontal well E, and is perpendicular to the second horizontal well B, and the two first water injection wells X are respectively on the same side of the first horizontal well A and the third horizontal well C and perpendicular to the first horizontal well A or the th...

Embodiment 2

[0041] On the basis of Example 1, the spacing between two adjacent wells of the six horizontal wells described in Step 1 is 500m. The row spacing between the first water injection well X at the end of the first horizontal well A and the first horizontal well A, and the row spacing between the first water injection well X at the end of the third horizontal well C and the third horizontal well C , the row spacing between the second water injection well Y at the end of the fourth horizontal well D and the fourth horizontal well D, and the row spacing between the second water injection well Y at the end of the sixth horizontal well F and the sixth horizontal well F are 180-220m. The row spacing between the first water injection well X at the end of the first horizontal well A or the third horizontal well C and the second horizontal well B, the second injection well at the end of the fourth horizontal well D or the sixth horizontal well F The row spacing of the water injection wel...

Embodiment 3

[0062] On the basis of Example 2, the row spacing between the first water injection well X at the end of the first horizontal well A and the first horizontal well A, the distance between the first water injection well X at the end of the third horizontal well C and The row spacing of the third horizontal well C, the row spacing between the second water injection well Y at the end of the fourth horizontal well D and the fourth horizontal well D, the second water injection well Y at the end of the sixth horizontal well F and the sixth horizontal well Y The row spacing of horizontal well F is 200m. The row spacing between the first water injection well X at the end of the first horizontal well A or the third horizontal well C and the second horizontal well B, the second injection well at the end of the fourth horizontal well D or the sixth horizontal well F The row spacing of water injection well Y and the fifth horizontal well E are both 130m.

[0063] According to the main lat...

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Abstract

The invention belongs to the technical field of oilfield development, and provides a well pattern spacing method of a triangular horizontal well. The well pattern spacing method has the advantages that 1, the methods of oil reservoir engineering, numerical simulation and mine statistics are comprehensively utilized, and technical indexes and economic indexes are simultaneously considered; 2, the capacity of large-scale volume fracturing is realized, and the output of single well is greatly improved; 3, the geology and technology are integrated; the different reservoir features and a targeted modification technology are sufficiently considered in the well pattern optimizing process, and the requirements of long-time stable water injection and energy supplementing can be simultaneously met; the purposes of effectively injecting water and supplementing energy can be realized under the condition of large-scale volume fracturing, an effective displacement fracturing system is established, the risk of fracture type water flooding is decreased, and the preliminary gradually-decreased horizontal well spacing type is reduced.

Description

technical field [0001] The invention belongs to the technical field of oilfield development, and in particular relates to a well pattern layout method for triangular horizontal wells. Background technique [0002] At present, the development of ultra-low permeability tight oil resources has become a new topic for the development of my country's petroleum industry. The production practice of tight oil reservoirs at home and abroad has shown that horizontal well development is an effective development method for such reservoirs. The formation pressure coefficient of foreign tight oil reservoirs is high (the formation pressure coefficient is between 1.2 and 1.5), and the viscosity of the formation crude oil is low. Basically, depletion is used in the initial stage of production. At the same time, supplementary energy development methods such as water injection and gas injection are being explored. Good effect; compared with the tight oil reservoirs successfully developed abroad...

Claims

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Application Information

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IPC IPC(8): E21B43/30E21B43/26E21B43/20
CPCE21B43/20E21B43/26E21B43/305
Inventor 谢启超王选茹刘万涛曲春霞黄天镜温德顺马静韩发俊
Owner PETROCHINA CO LTD
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