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

The Method of Using Oilfield Sewage to Improve the Recovery of Fault Block Reservoir

A technology of oilfield sewage and recovery rate, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of oilfield sewage discharge and treatment difficulties, oilfield sewage, lack of economical and efficient effective means, etc. , to achieve the effect of alleviating the problem of sewage discharge, expanding water flooding and improving oil recovery

Active Publication Date: 2016-04-13
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, as the water content of oil reservoirs continues to rise, oil well production fluids continue to increase, resulting in more and more oilfield sewage, which brings great difficulties to the discharge and treatment of oilfield sewage
At present, domestic and foreign countries already have appropriate technical methods for tapping the remaining oil potential in the "locally enriched" area of ​​fault-block reservoirs in the ultra-high water-cut period. How to achieve zero discharge of sewage still lacks economical, efficient and effective means, and it is urgent to find new economical and efficient technical methods for improving oil recovery and sewage utilization

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
  • The Method of Using Oilfield Sewage to Improve the Recovery of Fault Block Reservoir
  • The Method of Using Oilfield Sewage to Improve the Recovery of Fault Block Reservoir
  • The Method of Using Oilfield Sewage to Improve the Recovery of Fault Block Reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] according to figure 2 and image 3 , Oilfield 1 is a typical strip-shaped narrow-roof fault-block reservoir with a buried depth of 1950m and an oil-bearing area of ​​0.92km 2 , the effective thickness of the oil layer is 9.3m, the porosity is 27.5%, and the air permeability is 673×10 -3 μm 2 , formation crude oil viscosity 9.3mPa.s, geological reserves 119×10 4 t, the original water-to-oil volume ratio of the reservoir is about 10, the formation dip angle is 12.5°, and the oil-bearing strip is 3.6km long and 100m-250m wide. One oil well was opened before the test, with a daily oil production of 0.4t / d, a comprehensive water cut of 97.7%, a dynamic liquid surface of 800m, and a recovery rate of 31.5%. It has entered the stage of ultra-high water cut and near technical abandonment.

[0029] (1) Screening is carried out according to the geological characteristics of the reservoir, the nature of crude oil and the development status. The reservoir meets the following c...

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 discloses a method for improving the fault block oil reservoir recovery efficiency by utilizing oilfield wastewater. The method comprises the steps of selecting a fault block oil reservoir region; developing a well network adopting a mode that water injection wells and oil production wells are combined, wherein the water injection wells and the oil production wells are large in well distance and staggered bidirectionally; selecting water well stable water injection oil wells or water well cyclic water injection oil wells to periodically perform oil recovery, wherein the injection-production ratio is kept higher than 1.0, and finally the oilfield wastewater are utilized to form artificial side water flooding for improving the fault block oil reservoir recovery efficiency in the fault block oil reservoir region. The method for improving the fault block oil reservoir recovery efficiency by utilizing the oilfield wastewater re-injects the oilfield wastewater to form the artificial side water flooding in an optimizing energy supplement mode, and five purposes of increasing the oil reservoir water flooding controlled reserves, effectively supplementing energy, widening a water flooding affection region, retarding edge water tongued advance and bottom water coning, effectively relieving wastewater discharge and the like can be achieved.

Description

technical field [0001] The invention relates to a method for zero discharge of oilfield sewage and a method for greatly increasing the recovery rate of water flooding in a complex fault-block oil reservoir during an extra-high water-cut period, in particular to a method for improving the oil recovery rate of fault-block oil reservoirs by using oilfield sewage. Background technique [0002] The produced geological reserves of fault-block reservoirs are large, and the distribution of remaining oil presents the characteristics of "universal distribution and local enrichment" as it enters the ultra-high water-cut development stage as a whole. In addition, as the water content of oil reservoirs continues to rise, oil well production fluids continue to increase, resulting in more and more oilfield sewage, which brings great difficulties to the discharge and treatment of oilfield sewage. At present, domestic and foreign countries already have appropriate technical methods for tappi...

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): E21B43/20
Inventor 杨勇王建牛栓文刘维霞路智勇胡罡庞丽丽宋志超吴义志王瑞
Owner CHINA PETROLEUM & CHEM CORP
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