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Viscosity reducer for gathering and transferring of single pipes and preparation method thereof

A viscosity reducer, gathering and transportation technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor adaptability

Active Publication Date: 2012-03-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above technologies have poor adaptability to crude oil single-pipe gathering and transportation for viscosity reduction in Chaheji Oilfield.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: the viscosity reducer for single-pipe gathering and transportation, the weight percentage of each component is:

[0043] 1. Sodium nonylphenol polyoxyethylene ether carboxymethyl: 3.5%;

[0044] 2. Liquid guanidine hydrochloride 0.5%;

[0045] 3. Polyoxyethylene alkylphenol sulfate sodium salt: 8.2%;

[0046] 4. Sodium pyrophosphate: 0.5%;

[0047] 5. Diethylene glycol ether: 12.5%;

[0048] 6. Pre-filmed drag and viscosity reducing agent BN-99: 5.6%;

[0049] 7. Arginine: 0.005%;

[0050] 8. Water is 69.195%, and the sum of the weight percentages of each component is 100%.

[0051]Production process: First, four raw materials, including nonylphenol polyoxyethylene ether carboxymethyl sodium, liquid guanidine hydrochloride, polyoxyethylene alkylphenol sulfate sodium salt, and sodium pyrophosphate, are added to the enamel reaction kettle according to the weight ratio. Slowly heat up to 65-75°C. Secondly, under continuous stirring, first add 6% of the...

Embodiment 2

[0052] Embodiment 2: the viscosity reducer for single-pipe gathering and transportation, the weight percentage of each component is:

[0053] 1. Sodium nonylphenol polyoxyethylene ether carboxymethyl: 3.5-4.5%;

[0054] 2. Liquid guanidine hydrochloride 0.5-0.65%;

[0055] 3. Polyoxyethylene alkylphenol sulfate sodium salt: 6.8-8.2%;

[0056] 4. Sodium pyrophosphate: 0.5-0.55%;

[0057] 5. Diethylene glycol ether: 12.5-14.5%;

[0058] 6. Pre-filmed drag and viscosity reducing agent BN-99: 5.5-6.5%;

[0059] 7. Arginine: 0.005-0.006%;

[0060] 8. Water is 68.354%, and the sum of the weight percentages of each component is 100%.

[0061] Production process is identical with embodiment 1. When the dosage is 180mg / l, the wellhead back pressure decreases by 28%.

Embodiment 3

[0062] Embodiment 3: the viscosity reducer for single-pipe gathering and transportation, the weight percentage of each component is:

[0063] 1. Sodium nonylphenol polyoxyethylene ether carboxymethyl: 3.5-4.5%;

[0064] 2. Liquid guanidine hydrochloride 0.5-0.65%;

[0065] 3. Polyoxyethylene alkylphenol sulfate sodium salt: 6.8-8.2%;

[0066] 4. Sodium pyrophosphate: 0.5-0.55%;

[0067] 5. Diethylene glycol ether: 12.5-14.5%;

[0068] 6. Pre-filmed drag and viscosity reducing agent BN-99: 5.5-6.5%;

[0069] 7. Arginine: 0.005-0.006%;

[0070] 8. Water is 68.695%, and the sum of the weight percentages of each component is 100%.

[0071] Production process is identical with embodiment 1. When the dosage is 150mg / l, the wellhead back pressure decreases by 27 percentage points.

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Abstract

The invention discloses a viscosity reducer for gathering and transferring of single pipes, which is applied to reducing the wellhead back pressure in the gathering and transferring processes of crude oil single pipes. The viscosity reducer consists of the following components in percentage by weight: 3.5-4.5 percent of nonylphenol polyoxyethylene ether sodium carboxymethyl, 0.5-0.65 percent of liquid guanidine hydrochloride, 6.8-8.2 percent of polyoxyethylene alkylphenol sodium sulfate, 0.5-0.55 percent of sodium pyrophosphate, 12.5-14.5 percent of diethylene glycol diethyl ether, 5.5-6.5 percent of pre-film drag reduction viscosity reducer BN-99, 0.005-0.006 percent of arginine and the balance of water, wherein the sum of the percentage by weight of each component is 100 percent. The viscosity reducer has the effect that: when 150-200 mg / l of viscosity reducer is added, the wellhead back pressure of an oil well can be lowered by 25-30 percent.

Description

technical field [0001] The invention relates to the technical field of petroleum industrial chemicals, in particular to a viscosity reducer for reducing wellhead back pressure during single-pipe gathering and transportation of crude oil, and is a viscosity reducer for single-pipe gathering and transportation and a preparation method thereof. Background technique [0002] The largest integrated sandstone oilfield in North China - Chaheji Oilfield, after simplified optimization, a single tube set with high and low liquid production wells connected in series, single wells connected in trunk lines, multi-well branched in series, branch rings mixed with water in series, and viscosity reduced by adding chemicals The oil matching process has achieved a freezing point of 33°C and a liquid production of 3m 3 The / d oil well collects oil without heat tracing throughout the year, which opens up a new situation of simplified optimization of "high freezing point, low liquid production" t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/588
Inventor 耿玉广姚红星马秀荣刘海俊齐惠恩陶宝胜杨建雨杨达玉王婷婷
Owner PETROCHINA CO LTD
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