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

Fracture-vug type oil reservoir runner profile control agent system and preparation method thereof

A profile control agent and fracture-cavity type technology, which is applied in the field of preparation of the profile control agent system of the fracture-cavity type oil reservoir, can solve the problems of affecting the effect of the regulator, difficult to enter the deep formation, deposition and stratification, etc. Good resistance to high temperature and high salt, rapid expansion and enhanced oil recovery

Active Publication Date: 2021-03-12
三智鼎业(北京)能源技术有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing agent system, under the combined influence of formation salinity and high-temperature and high-salt conditions, the regulator injected into the formation is prone to various types of degradation and structural changes, causing problems such as deposition and stratification, and affecting the final action on the In addition, when the common pre-crosslinked granular regulators are injected into the shallow low-temperature area, the pressure gradient may be too large due to rapid water absorption and expansion, and the volume of the particles will expand to the original tens. The speed of more than 10 times is too fast, it is difficult to enter the deep part of the formation, which limits the scope of depth profile control

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
  • Fracture-vug type oil reservoir runner profile control agent system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] S1: Preparation of the main agent gel

[0028] 12 g of acrylamide was added to 0.8 g of 1% concentration of azobiobutile solution initiator, 0.48 gn, N-bis dihydroxymethylurea, 0.4 g of polyethylene glycol double maleate, 50 g of water, The mixture was stirred in a 70 ° C water bath for 5 h, and 8 g of the bentonite and vermiculum were added to the obtained mixed solution, and the temperature was continued for 5 h, resulting in the main agent gel.

[0029] S2: Preparation of the conditioning agent of the seam type reservoir

[0030] The main agent gel prepared in step S1 was moved to a 90 ° C oven for 24 h, resulting in an electrical adhesive solid, and then grinded by an electrical particulate sample using a grinder and a 100 mesh screen.

Embodiment 2

[0032] The preparation process of the main agent gel and the slot hole reservoir section is the same as in Example 1, which is different in which N, N-double dihydroxymethylene urea is 0.64 g, polyethylene glycol double malai The amount of acid ester was 0.4 g, and the amount of water was 50 g.

Embodiment 3

[0034] The preparation process of the main agent gel and the slot-type reservoir cross-channel conditioning system is the same as in Example 1, and the difference is that N, N-double dihydroxymethylene is urea is 0.8 g, and polyethylene glycol double male The amount of acid ester was 0.4 g, and the amount of water was 50 g.

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 fracture-vug type oil reservoir runner profile control agent system and a preparation method thereof. The profile control agent is prepared by mixing the following raw materials in parts by mass: making acrylamide react with N,N-bis(dimethylol)urea, polyethylene glycol bismaleimide, an initiator, an auxiliary agent and water for 10 hours under the condition of 70 DEG C and nitrogen protection, and drying for 24 hours at 90 DEG C to obtain profile control agent particles. According to the invention, N,N-bis(dimethylol)urea and polyethylene glycol bismaleimide are respectively copolymerized with an acrylamide monomer to obtain a double cross-linked polymer, and different from conventional granular profile control agent molecules, the profile control agent particlescan be gradually hydrolyzed in water while the molecular strength of the profile control agent is ensured, so that the expansion and plugging adjustment effects of particles are improved, low-temperature slow expansion effect is good, and the particles expand rapidly at high temperatures, and has favorable high-temperature and high-salt resistance; and the profile control agent particles can be conveyed to the deep part of the complex pore structure of the fracture-cavity type oil reservoir to quickly play a role in adjustment, and can satisfy the reservoir adjustment of different depths and structures.

Description

Technical field [0001] The present invention relates to the field of oil and gas field development, and more particularly to a preparation method of a seventh-type reservoir cross-channel electrical treatment system. Background technique [0002] The storage feature of the seam type reservoir is that the reservoir storage is mainly randomized, and the permeability of the dense bezel rock is low, the single water is different, the water is complex, the water well is usually There is no sign, and the water is serious, and it is possible to suddenly stop spray. Therefore, based on the research results of the seam type reservoir, the reservoir space and flow path are adjusted to stabilize the oil, to ensure An important means of normal harvesting of the suture type reservoir. [0003] Adjustment of the flow path of the existing seam type reservoir, currently use chemical synthetic gels, precipitation, particles, etc., plug-in, the complex network fracture of the seam type reservoir, ...

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 Applications(China)
IPC IPC(8): C09K8/512C09K8/88C08F290/06C08F220/56
CPCC08F290/062C09K8/5083C09K8/512C09K8/882C09K8/887C08F220/56
Inventor 张继欧学峰
Owner 三智鼎业(北京)能源技术有限公司