Environment-friendly high-temperature-resistant gas oil synthetic-based drilling fluid and preparation method and application thereof

A gas-to-oil, high-temperature-resistant technology, applied in the field of environmentally friendly high-temperature-resistant gas-to-oil synthetic base drilling fluid, can solve the problems of oil-based drilling fluid pollution, application and promotion restrictions, etc., and achieve good rheology and good high-temperature emulsification The effect of agent stability and good high temperature and high pressure filtration performance

Active Publication Date: 2015-02-04
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 oil synthetic-based drilling fluid and preparation method and application thereof
  • Environment-friendly high-temperature-resistant gas oil synthetic-based drilling fluid and preparation method and application thereof
  • Environment-friendly high-temperature-resistant gas oil synthetic-based drilling fluid and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

[0042] 80 parts by weight of gas to oil, 20wt% of CaCl 2 20 parts by weight of aqueous solution, main emulsifier DREM-13 by weight, auxiliary emulsifier DRCO-13 by weight, organic soil DRGEL 2 parts by weight, fluid loss agent DF014 by weight, calcium oxide 2 parts by weight, and barite 215 parts by weight .

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

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

[0045] Add 20wt% CaCl to the first mixed solution 2 The aqueous solution was stirred at high speed for 30 minutes to obtain the second mixed solution;

[0046] Add the...

Embodiment 2

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

[0055] 85 parts by weight of gas to oil, concentration of 20wt% CaCl 2 15 parts by weight of aqueous solution, main emulsifier DREM-13 by weight, auxiliary emulsifier DRCO-13 by weight, organic clay DRGEL 2 parts by weight, fluid loss reducer DF014 by weight, calcium oxide 2 parts by weight, and barite 215 parts by weight.

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

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

[0058] Add 20wt% CaCl to the first mixed solution 2 The aqueous solution was stirred at high speed for 30 minutes to obtain the second mixed solution;

...

Embodiment 3

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

[0068] 90 parts by weight of gas to oil, 20wt% of CaCl 2 10 parts by weight of aqueous solution, main emulsifier DREM-13 by weight, auxiliary emulsifier DRCO-15 by weight, organic clay DRGEL 3 by weight, fluid loss reducer DF015 by weight, calcium oxide 2 by weight, and barite 318 by weight.

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

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

[0071] Add 20wt% CaCl to the first mixed solution 2 The aqueous solution was stirred at high speed for 30 minutes to obtain the second mixed solution;

[0072] Add the organic soil DRGE...

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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-liquid 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 deeper strata and farther oceans. Therefore, oil wells are getting deeper and deeper. In the drilling of deep and ultra-deep wells, due to the existence of geothermal gradient, the deeper the borehole, the higher the temperature in the borehole. The bottom-hole temperature of ultra-deep wells exceeding 7000m in western oilfields and deep wells exceeding 5000m in eastern oilfields is likely to exceed 200℃. Under high temperature conditions, various components in the water-based drilling fluid will undergo changes such as degradation, fermentation, thickening, failure, etc., result...

Claims

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Application Information

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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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