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Biosynthetic drilling fluid and preparation method thereof

A biosynthesis and drilling fluid technology, applied in the field of oil and gas exploration and development, can solve the problems of the environment containing aromatic hydrocarbons, strong biological toxicity, and low environmental pollution, and achieve the effects of small environmental hazards, good rheological properties, and good lubricity

Active Publication Date: 2021-07-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to overcome the serious environmental pollution problems such as oil-based cuttings produced by oil-based drilling fluids, waste oil-based drilling fluids that are difficult to degrade, strong biological toxicity, and containing aromatic substances, the present invention provides solutions to the above-mentioned A kind of biosynthesis-based drilling fluid and its preparation method according to the problem, the performance of the drilling fluid provided is similar to that of the oil-based drilling fluid system, but it does not contain aromatic hydrocarbons, has low toxicity, is biodegradable, is more easily accepted by the environment, and has little environmental pollution Biosynthetic Drilling Fluid

Method used

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  • Biosynthetic drilling fluid and preparation method thereof
  • Biosynthetic drilling fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] This embodiment provides a density 1.60g / cm 3 , The oil water ratio is 80:20 biosynthetic base drilling fluid, which is prepared from the following weight percentage of raw materials: biodiesel 320ml, 6.0g of the organic soil, 14.0g of the main emulsifier, 8.0g, lime 10.0g, quality concentration For 26% of the calcium chloride solution 80ml, the filter dosage is 16.0g, a wetting agent 2.0g, a stream modulator 3.2 g, and a crystalline stone powder 400g.

[0037] The preparation method is as follows:

[0038] (1) Add biodiesel to the high mixture, add organic soil to stir at 11000 r / min at high speed;

[0039] (2) While stirring at high speed, the primary emulsifier continues to be added to stir at 11000 r / min at high speed;

[0040] (3) While stirring at high speed, the carbonate is continued to be added to 11000 r / min at a high speed of 20 min;

[0041](4) While stirring at high speed, the alkalin regulatagent lime is continued to stir at 11000 r / min at high speed...

Embodiment 2

[0048] This embodiment provides a density 2.30g / cm 3 , Oil-water ratio of biosynthesis liquid ratio of 90:10: it is prepared from the following weight of raw materials: biodiesel 360mL, 6.0g, main emulsifier 16.0g, carimetifier 8.0g, quality The concentration of 26% aqueous solution of calcium chloride is 40 ml, a lifting filter dosage 16.0g, a wetting agent 2.0g, a stream modulator 2.0 g, and a crystalline stone powder 1000g.

[0049] Its preparation method is the preparation method described in Example 1.

[0050] Example 1, the raw materials of Example 2 were sold in the market. They were strictly used in accordance with industry standards or enterprises in the purchase. Specifically, see Table 1

[0051] Table 1 Biosynthetic drilling fluid raw material bright table

[0052]

[0053]

[0054] 1. Comparative evaluation of the emulsifier emulsification effect

[0055] 2% main emulsifier was added to 240 ml of synthetic drilling fluid (biodiesel), stirred at a high speed for...

Embodiment 3

[0070] In this embodiment, the chemical properties of one biosynthetic drilled well prepared in Examples 1 and Example 2 were examined in this example:

[0071] 1. Evaluation of anti-high temperature effects

[0072] The formulated biosynthetic drilling fluid is rolled at different temperatures, and the constant temperature aging is 16h, cooling to 50 ° C to measure its rheology and electrical stability, and evaluate the temperature effect of biosynthetic drilled well fluid, and the measurement results are shown in Table 5.

[0073] Table 5 Rheological parameters under normal temperature of biosynthetic drilling fluid

[0074]

[0075]

[0076] It can be seen from Table 5 above: 2.30g / cm of density 3 And 1.60g / cm 3 The biosynthetic drilling fluid has a good resistance effect. When the temperature is less than 160 ° C, the high temperature high-pressure filter loss of the biosynthetic drilled well is controlled within 3.0 ml, and the drilling liquid filtration can be effect...

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Abstract

The invention discloses a biosynthesis-based drilling fluid and a preparation method thereof. The biosynthesis-based drilling fluid is prepared from the following raw materials: biodiesel, a calcium chloride solution, organic soil, a main emulsifier, an auxiliary emulsifier, a filtrate reducer, a wetting agent, lime, a flow pattern regulator and barite powder. The biodiesel comprises the following components in parts by weight: 80-90 parts of biodiesel and 20-10 parts of calcium chloride solution; wherein the main emulsifier is polyamide ester HYOZ, the auxiliary emulsifier is amide amine HYOF, and the flow pattern regulator is polyamide HYON. The biosynthesis-based drilling fluid provided by the invention can overcome the problems that oil-based rock debris and waste oil-based drilling fluid generated by conventional oil-based drilling fluid are difficult to degrade and strong in biotoxicity, contain aromatic hydrocarbon substances and the like and cause serious environmental pollution.

Description

Technical field [0001] The present invention relates to the field of oil and gas exploration and development, and more particularly to a biosynthetic basis drilling fluid and a preparation method thereof. Background technique [0002] Drilling fluid refers to the general name of various circulatory fluids that meet the needs of drilling work during the oil gas drilling process, which is essential in drilling, and is known as the blood of drilling. Drilling fluid needs to have functions of carrying and suspension cutting, stable well wall and control formation pressure, cooling, and lubrication drill bit, transmitting water, acquiring underground information, etc., there is a need to add a drilling fluid treatment agent having various functions therein. . According to the continuous phase, water-based drilling fluid, oil-based drilling fluid, synthetic drilling fluid, and the like. [0003] With the enhancement of people's environmental awareness, the requirements of drilling flui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/36
CPCC09K8/36C09K2208/12
Inventor 周代生胡锡辉杨欢唐庚张启根林强周兴钰明爽杨少云陈熙平
Owner PETROCHINA CO LTD
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