CN103666408A

CN103666408A - Shale formation protective agent

Info

Publication number: CN103666408A
Application number: CN201310469434.1A
Authority: CN
Inventors: 李火莲
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-10-10
Filing date: 2013-10-10
Publication date: 2014-03-26

Abstract

The invention discloses a shale formation protective agent which is characterized by consisting of the following components in parts by weight: 15-60 parts of quebracho bark, 20-50 parts of brown coal, 4-20 parts of black asphalt, 10-30 parts of sulfite, 1-20 parts of paraformaldehyde, 2-15 parts of sodium hydroxide, 30-50 parts of water and 1-10 parts of sodium bichromate. The preparation method comprises the following steps: mixing all the materials, stirring and reacting at the temperature of 100-1500 DEG C for 90-120 minutes, and adding the sodium bichromate for uniformly stirring to obtain the product. The shale formation protective agent has the advantages of readily available raw materials, low cost, environment friendliness, convenience in use and good effect.

Description

Shale formation protective material

Technical field

The invention belongs to a kind of oil field chemical.

Background technology

Oil field chemical, in a broad sense, mean each lamp chemical for all technological processs such as petroleum prospecting, drilling, collection are defeated, mainly comprise mineral products (as removing soil etc.), general chemical (as various bronsted lowry acids and bases bronsted lowries etc.), natural product (as starch), inorganic product (as zinc carbonate) and special use (fine chemistry industry) product (as polymkeric substance and tensio-active agent etc.).Finger in the probing of oil, Sweet natural gas, adopt defeated, water conditioning and improve recovery ratio process in an analog assistant used, it various in style, major part belongs to water-soluble polymers (as vegetable jelly, polyacrylamide, Mierocrystalline cellulose and biological polymer) and tensio-active agent (sulfonated petro-leum, alcohol radical or alkylphenol base oxethyl ether).The content of oilfield chemistry research is mainly the preparation of this chemical, the evaluation of performance (comprising basic theory), screening formula, working design and test in place.Because reservoir condition is different, the performance of crude oil, water quality, rock is different, and the specific aim of chemical used (formula) is very strong.In order to develop and reasonably to use oil field chemical, need diverse discipline knowledge (as organic chemistry, inorganic chemistry, physical chemistry, chemical engineering, analytical chemistry, hydromeehanics, reservoir engineering and computational mathematics etc.).Oilfield chemistry forms emerging boundary science gradually, more and more comes into one's own.According to < < 2013-2017 China's oil field chemical industry market research and investment forecasting analysis report > > [1] data analysis, since nearly more than ten years, China's oilfield chemical technology development rapidly, has formed more wide oil field chemical market.According to incompletely statistics, nineteen ninety-five oil field at home chemicals usage be 102.9 ten thousand tons, and by 2009, whole industry usage quantity reached 1,470,000 tons.Between 15 years, the usage quantity of oil field chemical has increased more than 42%, and market scale increases over 180%.Wherein, drilling well is maximum by chemicals usage, accounts for the 45%-50% of the total consumption of oil field chemical; Recover the oil with high content of technology with chemical, account for always the more than 30% of the amount of disappearing.China's new discovery oilfield reserve is limited, and the maturing field arduous task of taping the latent power, particularly for China's oil field feature, strengthens In Oil Field Exploration And Development, improves oil recovery rate, strengthen environmental protection, need more novel, efficient, oligosaprobic oil field chemical falls.At present, China Petrochemical Industry, PetroChina Company Limited. and three major companies of CNOOC are controlling China overwhelming majority's oil and natural gas oil well, and the preparation of drilling fluid in its oil mining process and technical service are also generally all responsible for by its special department.China drilling liquid technology service industry concentration degree is higher, and the top ten drilling liquid technology service enterprise market concentration is about 55%.The key enterprise that drilling liquid technology service is engaged in nationwide comprises Great Wall drilling fluid company of drilling project company limited, COSL, Shengli Oil Field drilling engineering technology company, Chuan Qing drilling project company limited of PetroChina Company Limited., Sichuan RenZhi oil field Technology Service stock Co., Ltd etc.At present, benevolence intelligence oilfield services is the drilling liquid technology service enterprise of domestic private maximum.Mainly refer to chemical displacement of reservoir oil chemical agent used.The chemical displacement of reservoir oil is divided into: 1. polymkeric substance water drive.A small amount of thickening material (as partially hydrolyzed polyacrylamide or biological polymer) is soluble in water, and the viscosity of increase water, improves the fingering of water when injecting, and improves oil recovery factor.2. surfactant slug drives, surfactant slug is the microemulsion being made into by sulfonated petro-leum or synthesising sulfonate and activity promotor alcohol, it has ultra low interfacial tension, and (<10-8N/cm can by the mother oil displacement in kapillary out, improve oil recovery factor.Maximum difficulty is the loss (absorption, trapping, precipitation) will overcome tensio-active agent and flow in oil reservoir time.3. caustic waterflooding, injects oil reservoir by caustic soda water, reacts with the active ingredient in crude oil, forms emulsion, to improve oil recovery factor.

Through Chinese publication retrieval, do not find the scheme identical with present patent application.

Summary of the invention:

The object of the invention is to; The defect existing for current oil layer protective agent, proposes a kind of protection oil reservoir, anti-collapse, shale formation protective material of falling leak-off effect of having concurrently.

Shale formation protective material of the present invention, is characterized in that: by weight, by quebracho 15-60 part, brown coal 20-50 Fen ， ?pitch 4-20 part, sulphite 10-30 part, paraformaldehyde 1-20 part, sodium hydroxide 2-15 part, water 30-50 part; Red all sodium 1-10 parts form, and by whole mixing of materials, stirring reaction 90-120 minute at 100-1500 ℃, adds red all sodium to stir, and obtains product.

The present invention compared with prior art its beneficial effect is: have raw material and be easy to get, cost is low, and environmental protection is easy to use, have concurrently protection oil reservoir, anti-collapse, leak-off effect, effective advantage fall.

Embodiment:

Below in conjunction with embodiment, the invention will be further described, but embodiments of the present invention are not limited to this.

Shale formation protective material of the present invention, raw materials usedly buys acquisition.

Embodiment 1

Embodiment 2

Shale formation protective material of the present invention, is characterized in that: by weight, by 15 parts of quebrachos, brown coal 20 Fen ， ?4 parts of pitches, 10 parts, sulphite, 1 part of paraformaldehyde, 2 parts, sodium hydroxide, 30 parts, water; 1 part of composition of red all sodium, by whole mixing of materials, stirring reaction 90-120 minute at 100-1500 ℃, adds red all sodium to stir, and obtains product.

Embodiment 3

Shale formation protective material of the present invention, is characterized in that: by weight, by 60 parts of quebrachos, brown coal 50 Fen ， ?20 parts of pitches, 30 parts, sulphite, 20 parts of paraformaldehydes, 15 parts, sodium hydroxide, 50 parts, water; 10 parts of compositions of red all sodium, by whole mixing of materials, stirring reaction 90-120 minute at 100-1500 ℃, adds red all sodium to stir, and obtains product.

Embodiment 4

Shale formation protective material of the present invention, is characterized in that: by weight, by 15 parts of quebrachos, brown coal 50 Fen ， ?4 parts of pitches, 30 parts, sulphite, 1 part of paraformaldehyde, 15 parts, sodium hydroxide, 30 parts, water; 10 parts of compositions of red all sodium, by whole mixing of materials, stirring reaction 90-120 minute at 100-1500 ℃, adds red all sodium to stir, and obtains product.

Embodiment 5

Shale formation protective material of the present invention, is characterized in that: by weight, by 60 parts of quebrachos, brown coal 20 Fen ， ?20 parts of pitches, 10 parts, sulphite, 20 parts of paraformaldehydes, 2 parts, sodium hydroxide, 50 parts, water; 1 part of composition of red all sodium, by whole mixing of materials, stirring reaction 90-120 minute at 100-1500 ℃, adds red all sodium to stir, and obtains product.

Shale formation protective material product of the present invention, have have concurrently protection oil reservoir, anti-collapse, leak-off effect falls.

Product index: the orange-yellow liquid of outward appearance; Effective constituent 95%; Solid content is more than 70%, and its 10% solution pH value is 7.0-8.5; Viscosity 300-420 centipoise; 3 years shelf liveves.

Claims

1. a shale formation protective material, is characterized in that: by weight, by quebracho 15-60 part, brown coal 20-50 part, ?pitch 4-20 part, sulphite 10-30 part, paraformaldehyde 1-20 part, sodium hydroxide 2-15 part, water 30-50 part; Red all sodium 1-10 parts form, and by whole mixing of materials, stirring reaction 90-120 minute at 100-1500 ℃, adds red all sodium to stir, and obtains product.