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New method for increasing reservoir reconstruction volume through subdivision cutting and temporary plugging steering combined technology

A technology of reservoir reconstruction and new method, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problem of no contribution to productivity, achieve less pollution of the reservoir, maximize the volume of the reservoir, increase the production capacity, etc. The effect of sophistication

Active Publication Date: 2019-04-12
CHINA UNIV OF PETROLEUM (BEIJING) +2
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Problems solved by technology

Distributed temperature sensors and acoustic sensor monitoring show that about 1 / 3 of the perforation clusters do not form effective fractures, and about 1 / 3 of the perforation clusters with fractures do not contribute to productivity

Method used

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  • New method for increasing reservoir reconstruction volume through subdivision cutting and temporary plugging steering combined technology
  • New method for increasing reservoir reconstruction volume through subdivision cutting and temporary plugging steering combined technology

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] Such as figure 1 As shown, a new method of subdividing and cutting combined with temporary plugging and diverting technology to improve the volume of reservoir stimulation in the present invention includes the following steps:

[0039] Step 1: Carry out quick-drilling bridge plugs and high-density clustered perforations to realize subdivision cutting of horizontal wells, such as figure 1 Shown; where horizontal wells are segmented and clustered, the principles to be followed for subdivision and cutting are as follows:

[0040] (1) According to mud logging and electrical measurement data, the location with relatively good physical properties is selected;

[0041] (2) Avoid layers with poor cementing quality according to the results of the sound amplitude curve;

[0042] (3) For oil layers with similar brittleness index but shorter, two clusters...

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Abstract

The invention relates to a new method for increasing the reservoir reconstruction volume through a subdivision cutting and temporary plugging steering combined technology, and belongs to the field ofpetroleum and natural gas exploitation. The invention aims to provide the new method for increasing the reservoir reconstruction volume through the subdivision cutting and temporary plugging steeringcombined technology to solve problems, subdivision cutting of a horizontal well is achieved through fast drilling bridge plugs and high-density clustered jet holes, and fracturing fluid and active fluid are injected to open a first-stage artificial fracture in a pressing mode; then sand-carrying fluid containing cleaning steering material fluid is injected to temporarily plug the fracture which ispressed to be open before and a blast hole, the fracture is forced to steer longitudinally, and displacement fluid is used for displacing; and finally a fracture lattice structure is formed. According to the new method, through an adopted subdivision cutting method, high-density artificial fracture well completion is conducted to sufficiently cut a reservoir so as to achieve reservoir working volume maximization, and the production efficiency of all jet hole clusters can be improved by combining with a temporary plugging steering technology; and meanwhile, large-displacement fracturing construction is conducted, the complexity degree of the artificial fractures can be increased, the petroleum leakage area is increased, and the reservoir reconstruction volume is increased.

Description

technical field [0001] The invention relates to a new method for increasing reservoir reconstruction volume by subdivision cutting combined with temporary blocking and steering technology, which belongs to the field of oil and gas exploitation. Background technique [0002] my country has huge low-permeability oil and gas resources. Among the proven reserves, low-permeability reservoirs account for more than 2 / 3 of the national reserves, and the development potential is huge. This kind of oil and gas resources has the characteristics of three lows, that is, low permeability, low abundance, and low single well productivity. [0003] With the rapid development of hydraulic fracturing technology, staged multi-cluster fracturing of horizontal wells has played a huge role in the development of low-permeability oil and gas reservoirs. Fracturing stimulation volume is a crucial parameter affecting the stimulation effect of low-permeability reservoirs. For low-permeability unconve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/11E21B43/267E21B43/27E21B33/13
CPCE21B33/13E21B43/11E21B43/267
Inventor 周福建李根生李奔王博葛洪魁姚二冬梁天博杨晨盛茂高立阳左洁
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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