Unlock instant, AI-driven research and patent intelligence for your innovation.

A sand-carrying liquid-squeezing reservoir reconstruction method

A technology for reservoir stimulation and oil formation, applied in chemical instruments and methods, earthwork drilling and production, wellbore/well components, etc., can solve problems such as lack of technical and theoretical research, low production capacity, and poor formation permeability

Active Publication Date: 2022-06-24
XINJIANG YONGSHENG ENERGY CO LTD
View PDF20 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technical and theoretical research on oil well sand-carrying fluid-squeezing reservoir stimulation is still lacking, and there are problems of poor formation permeability and low productivity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A sand-carrying liquid-squeezing reservoir reconstruction method
  • A sand-carrying liquid-squeezing reservoir reconstruction method
  • A sand-carrying liquid-squeezing reservoir reconstruction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Input the design parameters according to the construction well conditions.

[0059] At present, the steam injection effect of this well is poor, and it is necessary to squeeze liquid out of the reservoir to break the plug, improve the permeability, and reduce the steam injection pressure at the wellhead.

[0060] The pipe string is made of N80, φ73mm varnished oil pipe with flared mouth.

[0061] The perforation thickness of the well is 13m, the treatment thickness is 13m, and the porosity is 20%.

[0062] 30 / 50 mesh quartz sand volume 3.0m 3 , sand ratio 4%, sand strength=3 / 13≈0.23m 3 / m

[0063] 5. It is proposed that the strength of this squeeze liquid treatment is about 8.1m 3 / m, the treatment radius is 3.6m, and the calculated amount of sand-carrying and plugging breaking fluid is 109m 3 .

[0064] 1. Basic data of oil layer of construction well

[0065] The reservoir lithology is sandstone, and the storage space is a pore-fracture dual medium reservoir wit...

Embodiment 2

[0122] Input the design parameters according to the construction well conditions.

[0123] At present, the steam injection effect of this well is poor, and it is necessary to squeeze liquid out of the reservoir to break the plug, improve the permeability, and reduce the steam injection pressure at the wellhead.

[0124] String selection

[0125] The perforation thickness of the well is 21m, the treatment thickness is 22.5m, and the porosity is 19%.

[0126] 30 / 50 mesh quartz sand volume 5m 3 , sand ratio 5%, sand strength = 0.36m 3 / m

[0127] It is proposed that the strength of this squeeze liquid treatment is 10.7m 3 / m, the treatment radius is 4.2m, and the calculated amount of sand-carrying and plugging breaking fluid is 150m 3 .

[0128] Carry out the absorption test. If the test pressure is less than the set pressure of 0.9MPa, it is in line with the construction pressure, and the next step can be performed; After setting the pressure, proceed to the next step. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle size (mesh)aaaaaaaaaa
diameteraaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention provides a sand-carrying liquid-squeezing reservoir reconstruction method, which belongs to the technical field of oilfield production increase and injection increase. The invention provides a sand-carrying squeeze fluid reservoir transformation method, comprising the following steps: inputting design parameters according to the construction well conditions; carrying out pressure testing on the construction wells: pressure testing with clean water to the set pressure, stabilizing the pressure for 10 minutes, and the pressure drop < 0.5MPa is qualified; start the liquid supply pump to supply liquid to the pump truck, start the sand supply device and the shock wave injection device to mix the liquid, and squeeze the sand-carrying plugging breaking fluid into the oil layer of the construction well. The invention squeezes the sand-carrying plugging breaking fluid into the oil layer, displaces the pollution in the area near the well, expands the seepage radius, improves the liquid supply capacity, and enables the oil well to increase production and injection.

Description

technical field [0001] The invention relates to the technical field of oil field stimulation and injection, in particular to a method for improving a reservoir with sand-carrying liquid squeezed out. Background technique [0002] The world's low-permeability oil and gas fields are very rich in resources and widely distributed. Basically, all oil-producing countries have this type of oil and gas fields, and they are widely distributed in the United States, Canada, Australia, and Russia. In my country, low-permeability oil and gas fields are also widely distributed in various oil fields in the country, such as Daqing, Shengli, Liaohe, Changqing, Tuha, Zhongyuan, Xinjiang and other oil fields, which play an important role in contributing to the world's energy. With the increasing demand for energy around the world, more and more difficult-to-recover reserves have been put into development in recent years, a large part of which are low-permeability oil fields. Low-permeability ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26C09K8/52C09K8/514
CPCE21B43/26E21B43/261C09K8/52C09K8/514
Inventor 董琪肖舒月李新强蒋立明赵红艳彭通曙李情霞寸猛史源源敬思伟何小群费涛张振前王健军
Owner XINJIANG YONGSHENG ENERGY CO LTD