Environment-friendly high temperature resistant gas-to-oil synthetic base drilling fluid and its preparation method and application

A gas-to-oil, high-temperature-resistant technology is applied in the field of environment-friendly, high-temperature-resistant gas-to-oil synthetic-based drilling fluids, which can solve the problems of oil-based drilling fluid pollution, restrictions on application and popularization, and achieve good rheology and high-temperature emulsification. The effect of agent stability and good high temperature and high pressure filter loss performance

Active Publication Date: 2017-12-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the pollution of oil-based drilling fluids, the application and popularization of oil-based drilling fluids in sensitive land areas and offshore complex formations are limited.

Method used

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  • Environment-friendly high temperature resistant gas-to-oil synthetic base drilling fluid and its preparation method and application
  • Environment-friendly high temperature resistant gas-to-oil synthetic base drilling fluid and its preparation method and application
  • Environment-friendly high temperature resistant gas-to-oil synthetic base drilling fluid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides an environment-friendly high-temperature resistant gas-to-oil synthetic base drilling fluid, which includes the following components in parts by weight:

[0042] Gas-to-oil 80 parts by weight, CaCl concentration 20wt% 2 20 parts by weight of aqueous solution, 13 parts by weight of main emulsifier DREM-13 parts by weight of auxiliary emulsifier DRCO-13 parts by weight, 2 parts by weight of organic soil DRGEL, 14 parts by weight of fluid loss control agent, 2 parts by weight of calcium oxide and 215 parts by weight of barite .

[0043] The environment-friendly high-temperature resistant gas-to-oil synthetic base drilling fluid of this example is prepared by the following method:

[0044] Add main emulsifier DREM-1 and auxiliary emulsifier DRCO-1 to gas-to-oil, stir at high speed for 20 minutes to obtain the first mixed liquid;

[0045] Add the CaCl of concentration 20wt% in the first mixed liquor 2aqueous solution, stirred at high speed for 30 ...

Embodiment 2

[0054] This embodiment provides an environment-friendly high-temperature resistant gas-to-oil synthetic base drilling fluid, which includes the following components in parts by weight:

[0055] Gas-to-oil 85 parts by weight, CaCl concentration 20wt% 2 15 parts by weight of aqueous solution, 13 parts by weight of main emulsifier DREM-13 parts by weight of secondary emulsifier DRCO-13 parts by weight of organic soil DRGEL, 14 parts by weight of fluid loss control agent DF0, 2 parts by weight of calcium oxide and 215 parts by weight of barite.

[0056] The environment-friendly high-temperature resistant gas-to-oil synthetic base drilling fluid of this example is prepared by the following method:

[0057] Add main emulsifier DREM-1 and auxiliary emulsifier DRCO-1 to gas-to-oil, stir at high speed for 20 minutes to obtain the first mixed liquid;

[0058] Add the CaCl of concentration 20wt% in the first mixed solution 2 aqueous solution, stirred at high speed for 30 minutes to obt...

Embodiment 3

[0067] This embodiment provides an environment-friendly high-temperature resistant gas-to-oil synthetic base drilling fluid, which includes the following components in parts by weight:

[0068] Gas-to-oil 90 parts by weight, CaCl concentration 20wt% 2 10 parts by weight of aqueous solution, 13 parts by weight of main emulsifier DREM-15 parts by weight of auxiliary emulsifier DRCO-15 parts by weight of organic soil DRGEL, 15 parts by weight of fluid loss control agent DF015 parts by weight of calcium oxide and 318 parts by weight of barite.

[0069] The environment-friendly high-temperature resistant gas-to-oil synthetic base drilling fluid of this example is prepared by the following method:

[0070] Add main emulsifier DREM-1 and auxiliary emulsifier DRCO-1 to gas-to-oil, stir at high speed for 20 minutes to obtain the first mixed liquid;

[0071] Add the CaCl of concentration 20wt% in the first mixed solution 2 aqueous solution, stirred at high speed for 30 minutes to obta...

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Abstract

The invention provides an environment-friendly high-temperature-resistant gas oil synthetic-based drilling fluid and a preparation method and an application thereof. The environment-friendly high-temperature-resistant gas oil synthetic-based drilling fluid comprises the following ingredients, by weight, 80-90 parts of gas oil, 2-3 parts of organic soil DRGEL, 3-4 parts of a main emulsifier DREM-1, 2-5 parts of an auxiliary emulsifier DRCO-1, 2-5 parts of a filtrate reducer DF01, 10-20 parts of a CaCl2 aqueous solution with the concentration of 20wt%, 2-4 parts of calcium oxide and barite. According to the drilling fluid, routine requirements of the drilling fluid can be met, and requirements on high temperature resistance and environmental protection of the drilling fluid in deep and ultra-deep wells in environmentally sensitive areas on land and on the sea are met.

Description

technical field [0001] The invention relates to an environment-friendly high-temperature-resistant gas-to-oil synthetic base drilling fluid and a preparation method and application thereof, belonging to the technical field of petroleum exploitation. Background technique [0002] With the continuous reduction of conventional oil and gas resources, oil exploration and development are gradually drilling into deeper formations and farther oceans. Therefore, the depth of oil wells is getting deeper and deeper. In the drilling of deep wells and ultra-deep wells, due to the existence of geothermal gradients, the deeper the wellbore, the higher the temperature in the wellbore will become. The bottom hole temperature of ultra-deep wells over 7000m in western oilfields and deep wells over 5000m in eastern oilfields is likely to exceed 200°C. Under high temperature conditions, various components in water-based drilling fluids will undergo changes such as degradation, fermentation, thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/22
CPCC09K8/36
Inventor 王茂功李英敏李爽李彦琴沈艳清张延丽郑建龙王发云
Owner BC P INC CHINA NAT PETROLEUM CORP
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