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

Clastic rock low-pressure oil-gas well reservoir protection liquid as well as preparation method and application thereof

A technology for reservoir protection and oil and gas wells, which is applied to chemical instruments and methods, drilling compositions, reagents, etc., can solve the problems of high cost of reservoir protective fluid, large leakage of reservoir protective fluid, etc., and achieves low cost , Save gas lift cost, protect reservoir effect

Inactive Publication Date: 2018-03-13
CHINA PETROLEUM & CHEM CORP
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a clastic rock low-pressure oil and gas well reservoir protection fluid and its preparation method and application, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the existing reservoir protection fluid has relatively low leakage during use. The problem of high cost of Yamato reservoir protection fluid

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
  • Clastic rock low-pressure oil-gas well reservoir protection liquid as well as preparation method and application thereof
  • Clastic rock low-pressure oil-gas well reservoir protection liquid as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: The clastic rock low-pressure oil and gas well reservoir protection fluid, raw materials include acrylamide copolymer 1% to 4%, a mixture of chromium acetate and organic zirconium 0.04% to 0.08%, hexamethylene 0.4% to 0.7% of the mixture of tetramine and hydroquinone, 0.05% to 5% of the mixture of phenolic resin, resorcinol and polyethyleneimine, 0.01% to 0.04% of thiourea, and the balance for water.

[0020] The clastic rock low-pressure oil and gas well reservoir protection fluid obtained from the raw materials described in this example is pumped into the wellbore and forms a high-viscosity gel filter cake temporary plugging layer on the hole or well wall through physical dehydration, effectively Block the leakage of workover fluid in medium and low permeability reservoirs.

Embodiment 2

[0021] Embodiment 2: The clastic rock low-pressure oil and gas well reservoir protection fluid, raw materials include acrylamide copolymer 1% or 4%, a mixture of chromium acetate and organic zirconium 0.04% or 0.08%, hexamethylene 0.4% or 0.7% of the mixture of tetramine and hydroquinone, 0.05% or 5% of the mixture of phenolic resin, resorcinol and polyethyleneimine, 0.01% or 0.04% of thiourea, and the balance for water.

Embodiment 3

[0022] Example 3: As an optimization of the above example, the raw materials include 2% of acrylamide copolymer, 0.05% of a mixture of chromium acetate and organic zirconium, and 0.05% of both hexamethylenetetramine and hydroquinone by weight percentage. 0.5% of the mixture, 0.1% of the mixture of phenolic resin, resorcinol and polyethyleneimine, 0.02% of thiourea, and the balance is water.

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 the technical field of oil-gas well reservoir protection liquid, in particular to a clastic rock low-pressure oil-gas well reservoir protection liquid as well as a preparationmethod and the application thereof. The clastic rock low-pressure oil-gas well reservoir protection liquid comprises an acrylamide copolymer, a mixture of chromium acetate and organic zirconium, a mixture of hexamethylenetetramine and hydroquinone, a mixture of phenolic resin, resorcinol and polyethyleneimine, as well as thiourea and water. The clastic rock low-pressure oil-gas well reservoir protection liquid provided by the invention can effectively protect a clastic rock low-pressure oil-gas well reservoir; the clastic rock low-pressure oil-gas well reservoir using the clastic rock low-pressure oil-gas well reservoir protection liquid provided by the invention minimally leaks or does not leak, the pressure bearing capacity is significantly improved, the gas lift cost can be reduced, and the oil and gas productivity recovery rate reaches 100 percent; the clastic rock low-pressure oil-gas well reservoir protection liquid provided by the invention is lower in cost and has a better application prospect.

Description

technical field [0001] The invention relates to the technical field of oil and gas well reservoir protection fluid, and relates to a clastic rock low pressure oil and gas well reservoir protection fluid and its preparation method and application. Background technique [0002] Reservoir protection has always been an important issue in the development of oil and gas fields, especially in clastic condensate gas reservoirs. In the process of workover and completion of clastic condensate gas wells, the loss of killing fluid not only causes incompatibility damage such as water sensitivity, but also produces liquid lock damage, which leads to a sharp drop in gas phase permeability, a significant reduction in gas well productivity, and increased gas production after workover. Fees for auxiliary measures such as lure spraying. The workover and completion operations of low-pressure wells have large pressure differences, large leakage, more serious reservoir damage, and higher gas lif...

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): C09K8/575
CPCC09K8/5753C09K8/5755Y02P20/141
Inventor 陈波李建伟陈浩黄成陈彪闫科举伍兴东曾伟于建孙德彬孙柏林杨川胡小菊
Owner CHINA PETROLEUM & CHEM CORP