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Sectioned multi-cluster synchronous volume fracturing technology for double horizontal wells

A dual-horizontal well and process technology technology, which is applied in the field of oil and gas field exploration and development, can solve problems such as unsatisfactory effects of production stimulation and reconstruction technology in tight oil reservoirs, and achieve the effects of improving the drilling encounter rate of oil layers, consistent minimum principal stress, and good location.

Active Publication Date: 2012-07-25
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to provide a dual-horizontal well segmented multi-cluster synchronous volumetric fracturing technology for the unsatisfactory effect of the existing tight oil reservoir stimulation technology

Method used

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  • Sectioned multi-cluster synchronous volume fracturing technology for double horizontal wells
  • Sectioned multi-cluster synchronous volume fracturing technology for double horizontal wells
  • Sectioned multi-cluster synchronous volume fracturing technology for double horizontal wells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the dual-horizontal well segmented multi-cluster synchronous volume fracturing technology is characterized in that the technology is implemented according to the following steps:

[0029] Step 1, synchronous fracturing area selection, according to the following three principles:

[0030] First, the geological conditions of the selected area are representative, that is, the average air penetration rate of the oil layer is less than 0.5%, and the reservoir has good oil content, that is, the thickness of the oil layer is greater than 8 meters, and the oil saturation is greater than 50%;

[0031] Second, the degree of reservoir control is high, and the oil layer drilling rate of horizontal wells in long horizontal sections is increased;

[0032] Third, the topographical conditions of the site permit, and the water supply conditions are good;

[0033] Step 2, selecting wells for simultaneous fracturing, and the two selected wells are two parallel...

Embodiment 2

[0042] Such as figure 2 As shown, according to the principle of selecting areas and wells for simultaneous fracturing, in 2011, two horizontal wells in the Xi** well area in the Xifeng area of ​​Changqing Oilfield were carried out for the test 1 and test 2 wells respectively. Application of volume fracturing technology.

[0043] The specific implementation process of the simultaneous volume fracturing technology for dual horizontal wells with segmented multi-clusters (segmented multi-clusters refers to a segment of multi-clusters, that is, there are two or more perforation clusters at each level) is carried out in accordance with the following steps:

[0044] Step 1. Simultaneous fracturing area selection and well selection

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Abstract

The invention belongs to the field of oil and gas field exploration, discloses novel technology for volume fracturing of a compact oil reservoir, and particularly relates to a sectioned multi-cluster synchronous volume fracturing technology for double horizontal wells. The technology is characterized by including the steps of synchronous fracturing selection, synchronous fracturing well selection, multi-section and multi-cluster perforation position determination, synchronous fracturing construction and synchronous fracturing effect evaluation. In the technology, cracks are impelled to turn by means of interference among the cracks, thereby realizing complicated netted cracks and effectively modifying the compact oil reservoir.

Description

technical field [0001] The invention belongs to the field of oil and gas field exploration and development, and is a new volume fracturing technology for tight oil reservoirs, in particular a segmented multi-cluster synchronous volume fracturing technology for dual horizontal wells. Background technique [0002] With the deepening of exploration and development of oil and gas fields, conventional oil and gas resources are gradually decreasing. Therefore, the exploration and development of unconventional oil and gas resources has become a supplementary and alternative resource for oil and gas resources. For unconventional oil and gas resources, the ability of the reservoir matrix to supply oil and gas to fractures is poor. It is difficult to achieve commercial exploitation of this type of reservoir by conventional fracturing methods only relying on a single fracturing main fracture and blindly pursuing long fracture stimulation. [0003] For this reason, referring to the conc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
Inventor 郭艳萍张冕池晓明韩文哲陈松袁冬蕊宋孝丹高红平杨燕刘欢王改红齐加德
Owner BC P INC CHINA NAT PETROLEUM CORP
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