Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for improving effective paving of propping agents in large and thick reservoir

A proppant and reservoir technology, which is applied in the field of improving the effective laying of proppant in the vertical direction of hydraulic fractures, can solve the problems of unreasonable fracturing construction methods, poor fracturing effect, and low propping efficiency, so as to improve the effective laying , improve the transformation effect, and realize the effect of effective support

Active Publication Date: 2013-04-10
SOUTHWEST PETROLEUM UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing fracturing technology in oilfields adopts unreasonable fracturing methods for thick and low-permeability reservoirs, resulting in low support efficiency and poor fracturing effect of thick (30-100m) reservoirs, according to the Due to the difference in physical properties in the vertical direction of thick reservoirs, the present invention provides a new method for improving the vertical effective laying of proppant in thick reservoirs

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
  • Method for improving effective paving of propping agents in large and thick reservoir
  • Method for improving effective paving of propping agents in large and thick reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]The fracturing interval of Well Yi 104-1 in Shengli Oilfield is 3698.2m-3775.5m, and the thickness of the fracturing interval is 77.2m, which is a typical thick layer. The physical properties of the reservoir in the fracturing and fracturing section of the well are relatively uniform, and concentrated perforation is carried out at 3715m to 3735m near the middle and upper part of the thick reservoir. Fracturing adopts sanding technology with different density proppant combinations, high density: medium density: low density ceramsite proppant according to the ratio of 1.5:1:1, using high density (1810kg / m 3 ) Ceramsite 48m 3 ;Medium density (1650kg / m 3 ) Ceramsite 32m 3 ;Low density (1470kg / m 3 ) Ceramsite 32m 3 In the process of fracturing, the way of adding sand in the fracturing process is to first pump high-density ceramsite, then pump medium-density ceramsite, and finally pump low-density ceramsite to add ceramsite proppant in order to effectively support all frac...

Embodiment 2

[0047] The fracturing interval of Well Yi 104-6 in Shengli Oilfield is 3724m-3785.5m, and the thickness of the fracturing interval is 61.5m, which is a typical thick reservoir. The physical properties of the upper No. 3 sublayer (3727m-3760m) and the lower No. 5 sublayer (3762m-3783.5m) of the fracturing interval are good. Concentrated perforation is used for these two sublayers respectively, and the perforation section is No. 3 The middle and upper part of the reservoir is 3731m-3744m and the middle and upper part of No. 5 reservoir is 3762m-3770m. The fracturing adopts sand-adding technology with different density proppant combinations. The ratio of high-density and low-density ceramsite proppant is 2.7:1, and high-density (density 1810kg / m 3 ) Ceramsite 128m 3 and low density (1470kg / m 3 ) Ceramsite 48m 3 , the way of adding sand during the fracturing process is to add ceramsite proppant in the order of pumping high-density ceramsite first, and finally pumping low-densit...

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

No PUM Login to View More

Abstract

The invention relates to a method for improving effective paving of propping agents in a large and thick reservoir. When the large and thick reservoir is perforated, with consideration that hydraulic fissures can be extended in the longitudinal direction and can be communicated with the whole reservoir during fracturing and with the consideration of the influence of the propping agents on the paving of the propping agents when the propping agents settle towards the bottoms of the fissures during propping agent conveying and according to the physical difference of the large and thick reservoirin the longitudinal direction, the large and thick reservoir is perforated in a centralized way; and during fracturing, the pavement of the propping agents in the hydraulic fissures can be adjusted by using a sand technology of combination of propping agents with different densities, different settlement speeds of the propping agents with different densities, and convective motion between sand carrying liquids with different densities, so that the propping agents can be effectively paved in the fracturing layer in the longitudinal direction according to the different requirements of physical properties of the reservoir on propping flow guidance capacities of fissures. The method can effectively overcome the defects of the prior art, and improve the propping efficiency, and the increase production effect of the improved reservoir fracturing.

Description

Technical field: [0001] The invention relates to a method for improving the effective laying of proppant in the vertical direction of hydraulic fractures in the process of fracturing and reforming in the field of oil and gas field development. Specifically, it relates to a method that is mainly used in thick and low-permeability reservoirs to improve the effect of fracturing and increasing production. Methods. Background technique: [0002] During the exploration and development of low-permeability reservoirs, thick reservoirs are usually encountered, especially in low-permeability glutenite reservoirs, the reservoirs are generally thick, the interlayers are thin, there is no effective barrier, and the fracture height formed by hydraulic fracturing It cannot be controlled at all. The fractures formed by hydraulic fracturing are usually tens of meters or even hundreds of meters high. If conventional hydraulic fracturing methods are used for this type of reservoir, the proppan...

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): E21B43/267
Inventor 郭建春毕义泉卢聪赵志红
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com