Perforation well completion method for improving productivity of medium-high permeability oil and gas reservoir

A technology for oil reservoirs and perforating charges, which is used in earth-moving drilling, wellbore/well components, and production fluids. The problems of limited pore volume and crushing zone treatment range can improve the conductivity and flow efficiency, reduce the pressure drop funnel near the wellbore, and improve the energy utilization rate.

Pending Publication Date: 2022-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large energy loss, the increased hole penetration, pore volume and treatment range of the fractured zone are limited, and the shape of the tip of the perforation hole cannot be effectively changed, so it is difficult to effectively improve the flow diversion capacity and single well productivity

Method used

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  • Perforation well completion method for improving productivity of medium-high permeability oil and gas reservoir
  • Perforation well completion method for improving productivity of medium-high permeability oil and gas reservoir
  • Perforation well completion method for improving productivity of medium-high permeability oil and gas reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The perforation completion method includes: matching and loading shaped charges, high-energy particles and ignition devices in the perforating gun according to the optimized perforation density, and the installation quantity ratio of perforating charges and high-energy particles is 1:1;

[0040] The deep-penetrating perforating bullet is used to implement energy-concentrating perforation on the casing, cement sheath and formation of the target reservoir, and the ignition device is used to realize the internal ignition of the perforating gun.

[0041] After ignition, the specific reaction process is as follows figure 1 Shown:

[0042]The internal ignition of the perforating gun is realized by the ignition device, and the energy-shaping perforating bullets are formed through high-temperature and high-pressure metal jets extruding the formation to form channels to start energy-enhancing perforation; the high-pressure metal jet extrudes the formation to complete the energy-...

Embodiment 2

[0052] Taking two wells F-1 and F-2 in the same layer in the rectangular (well spacing: row spacing = 2:1) drainage area of ​​a medium permeability oil reservoir as an example, the original formation pressure of the block is 27.8MPa, and the drainage The radius is 80m, the wellbore radius is 0.1m, the viscosity of formation crude oil is 5mPa.s, the volume coefficient of formation crude oil is 1.2, and the corresponding coefficient of drainage shape is 0.668. Well F-1 reservoir is buried at a depth of 2810m, and the reservoir permeability is 52×10 -3 μm 2 , the thickness of the oil layer is 14.5m; the middle depth of the reservoir of F-2 well is 2785m, and the permeability of the oil layer is 57×10 -3 μm 2 , the oil layer thickness is 15.6m. Well F-1 adopts the perforation completion method described in Example 1 of the present invention, with a perforation thickness of 14.5m and a perforation density of 16 holes / m. Hole completion method, perforation thickness 15.6m, perfo...

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Abstract

The invention relates to a perforation well completion method of an oil and gas well, in particular to a perforation well completion method for improving the productivity of a medium-high permeability oil and gas reservoir. According to the method, high-energy particles are innovatively introduced on the basis of the energy-gathered perforation technology to do work for the second time, firstly, energy-gathered metal jet flow is used for extruding a stratum at high temperature and high pressure to form a hole channel, the high-energy particles are dragged into the hole channel through the high-speed jet flow effect, and the high-temperature cloud atomized high-energy particles are fully diffused, rubbed and collided; the tail end of the hole channel is instantly cracked, a hole wall compaction layer on the periphery of the columnar hole channel is collapsed, and radial micro-cracks are formed in the immediate vicinity of the wellbore, so that reservoir pollution is relieved, the hole volume and the flow efficiency of the hole channel are effectively improved, and the flow conductivity and the single well productivity of the immediate vicinity of the wellbore of the medium-high permeability reservoir are improved.

Description

technical field [0001] The invention relates to a perforation and completion method for oil and gas wells, in particular to a perforation and completion method for increasing productivity of medium and high permeability oil and gas reservoirs. Background technique [0002] Casing cementing and perforating is the main completion method for oil and gas development. Its purpose is to penetrate the casing, cement sheath and a certain formation depth, establish an oil flow channel between the wellbore and the formation, penetrate depth, compaction zone, core Debris is the key factor affecting the perforation effect. For medium-high permeability reservoirs, concentrated energy perforation is a widely used perforation technology under the current casing cementing and completion method, which basically meets the needs of exploration, development and production establishment of such reservoirs, but there are still problems in the actual application process. The compaction zone at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B43/267E21B43/263E21B43/117E21B43/114
CPCE21B43/26E21B43/267E21B43/263E21B43/117E21B43/114
Inventor 张宗檩廖成锐郑彬涛黄波宋李煜姜阿娜陈培胜刘霜王丽萍仲岩磊
Owner CHINA PETROLEUM & CHEM CORP
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