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

Spacer fluid for deepwater well cementation and preparation method thereof

A deepwater cementing and spacer fluid technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor isolation effect of drilling fluid and cement slurry, etc., to prevent mutual pollution, good compatibility, and facilitate construction Effect

Active Publication Date: 2019-12-17
BC P INC CHINA NAT PETROLEUM CORP +2
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the spacer fluid provided by the related technology has improved the thermal insulation performance, the isolation effect on drilling fluid and cement slurry is poor

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
  • Spacer fluid for deepwater well cementation and preparation method thereof
  • Spacer fluid for deepwater well cementation and preparation method thereof
  • Spacer fluid for deepwater well cementation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0058] In the second aspect, the embodiment of the present invention also provides a method for preparing spacer fluid for deep-water well cementing, the method is applied to any spacer fluid for deep-water well cementing mentioned above, and the method includes:

[0059] According to the parts by weight of each component, the suspension stabilizer is added into the water, the first stirring is performed, and the first mixed liquid is obtained after dissolving.

[0060] Add diluent to the first mixed liquid, carry out the second stirring, after dissolving, add the weighting agent, carry out the third stirring, after uniform, obtain the spacer fluid for deep water well cementing.

[0061] Wherein, the suspension stabilizer is selected from at least one of attapulgite, bentonite, carboxymethyl cellulose, Wenlun gum, modified guar gum, polyacrylamide, and sodium silicate.

[0062] The above preparation method is simple, can be prepared on site, and is beneficial to deep water wel...

Embodiment 1

[0071] This example provides a spacer fluid for deepwater well cementing, which is prepared by the following method: add 2.85g attapulgite, 1.6g bentonite, 0.5g carboxymethyl cellulose, 0.05g modified melon to 100g water Er gum was stirred for 3 minutes at a speed of 4000 rpm, and dissolved for 30 minutes to obtain the first mixed solution. Then add 0.4g sodium lignosulfonate, 0.1g sulfonated tannin, 0.05g sodium chloride, 0.05g calcium chloride, 0.4g water to the first mixed solution, stir at 4000rpm for 10min, after uniform dissolution , to obtain the spacer fluid for deepwater well cementing provided in this embodiment.

Embodiment 2

[0073] This example provides a spacer fluid for deepwater well cementing, which is prepared by the following method: add 2.32g attapulgite, 1.28g bentonite, 0.36g carboxymethyl cellulose, 0.04g modified melon to 100g water Er gum was stirred for 3 minutes at a speed of 4000 rpm, and dissolved for 30 minutes to obtain the first mixed solution. Then add 0.8g sodium lignosulfonate, 0.2g sulfonated tannin, 0.1g sodium chloride, 0.1g calcium chloride, 0.8g water to the first mixed solution, stir at 4000rpm for 10min, after uniform dissolution , then add 28g of barite, stir at 4000rpm for 10min, and after uniformity, the spacer fluid for deepwater well cementing provided by this embodiment is obtained.

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 spacer fluid for deepwater well cementation and a preparation method of the spacer fluid, and belongs to the field of well cementation operation. The spacer fluid for deepwater well cementation comprises the following components in parts by weight: 2-8 parts of a suspension stabilizer, 1-4 parts of a diluent, 1-190 parts of a weighting agent and 100 parts of water, wherein the suspension stabilizer is selected from at least one of attapulgite, bentonite, carboxymethyl cellulose, welan gum, modified guar gum, polyacrylamide and sodium silicate. The spacer fluid has thefollowing effects that the intermiscibility between the spacer fluid and drilling fluid and cement paste is good, the rheological property after intermiscibility is good, and the problems of flocculation of the cement paste, shortening of thickening time and the like cannot be caused. The effect of isolating the drilling fluid from the cement paste is good, and the mutual pollution between the cement paste and the drilling fluid can be effectively prevented. The drilling fluid can be effectively diluted, and the displacement efficiency of the spacer fluid on the drilling fluid is improved. The spacer fluid can be applied to deepwater well cementation operation at the temperature of 0-30 DEG C, and construction of the deepwater well cementation operation is facilitated.

Description

technical field [0001] The invention relates to the field of well cementing operations, in particular to a spacer fluid for deep water well cementing and a preparation method thereof. Background technique [0002] Oil and gas resources in the deep water field account for a large proportion of the total oil and gas reserves, such as the hydrate layer (such as methane) deposited on the bottom of the deep water. However, the ambient temperature in deep water is low, the formation is soft, the fracture pressure is low, and fluid movement is easy to occur. Therefore, deep water cementing operation is a key link in oil and gas production. In deepwater cementing operations, it is necessary to use cement slurry to displace the drilling fluid to support the casing and seal the formation between the well wall and the casing. However, the miscibility of cement slurry and drilling fluid is poor. During the displacement process, it is easy to form a gel structure in the mixing section o...

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
IPC IPC(8): C09K8/467C09K8/48
CPCC09K8/467C09K8/48
Inventor 谢飞燕夏元博涂思琪王翀张其滨宋有胜赵宝辉石凌龙王建瑶邹建龙
Owner BC P INC CHINA NAT PETROLEUM 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