UA78086C2 - Biopolymer drilling fluid - Google Patents

Abstract

A biopolymer drilling fluid has high structural and rheological properties and stability to influence of high temperatures contains polymer reduction of filtration, biopolymer of xanthane type, surface-active surface, lubricant admixture, humates of alkaline metals, salts of alkaline and/or alkali-earth metals and water. As surface-active substance and lubricant admixture it contains ethylene diamides of fatty acids (product of condensation of ethylene diamine and phosphatide concentrate). As polymer reduction of concentration it contains starch and polyanion cellulose or carboxymethyl cellulose or carboxymethyloxyethylcellulose or oxyethylcellulose or hydrolyzed polyacrylnitrile. As humates of alkaline metals it contains coal and alkaline reagent or humate-potassium reagent, as salts of alkaline and/or alkaline-earth metals contains KCl, NaCl, CaCl2, MgCl2, bischofite. It is intended for the use at drilling in complex mining and rheological conditions, including in chemogene sediments and at high temperatures.

Description

the condensation product of monoethanolamine and crude starch or polyanionic cellulose, fish oils mixed with kerosene, monoethanolamine and either carboxymethylcellulose, or caflotoreagent - oxal) - 0.5-1.0 and water - the rest rcarboxymethyloxyethylcellulose, or

went Russian patent Me2179568, IPC 7 СО09К7/02, oxyethyl cellulose, or hydrolyzed publ. 20.02.2002, Byul. Me5)|. polyacrylonitrile 0.1-1.0;

In the clay-free drilling fluid for dissolving xanthan-type biopolymer 0.2-0.5; digging productive horizons of starch and carboethylene diamides of fatty acids 0.05-3.0; the weighting agent performs the function of reducing carbon-alkaline reagent or humateness of filtration, but the presence of potassium reagent in the solution is 3.0-6.0; carbonate weighting does not allow regulation - KSI, mass, Sasi", Mosi", bischofite 3.0-40.0; decrease the density of the drilling fluid. the rest is water.

The biopolymer reagent performs the function of a structure. Experiments have determined that in an aqueous solution of the agent, but its heat resistance is limited. the active functioning of each of its components in the proposed bunent in an aggressive environment (several different ratios of salts are used in the concentrated solution, the effect of high temperatures), where neither components in high concentrations, namely: hydhumates, nor biopolymer are not able to exist separately. rophobizing surfactant - PKD - When dissolved together, the interaction 515 provides an increase in the permeability of the collector; the chains of biopolymer molecules with polyanions, the DSB-4TT foam bag - a product of the condensation of alkali metal monoetamates due to the formation of vinolamine raw tallow oils mixed with kerosene, which number of hydrogen bonds. This interaction of mammon-monoethanolamine and flotation reagent - oxal - cromolecules provides an irreversible spatial is used to reduce anti-adhesion three-dimensional location in the water environment, properties and improve the lubricating properties - active binding of water even with aggressive action of the shafts; alcohols (polyglycol) are used in high concentrations of salts and high temperatures, as a clay inhibitor and bactericide, but at the same time, which provides increased structural and rheological properties, they are a highly toxic substance. properties and reduction of the filtration rate at

In addition, the disadvantage of this solution is the low concentration of polymers. stable structural and rheological properties, namely: To reduce the filtration rate, the synergistic mixture of the proposed amount of biopolymer and starch requires additional application, provides sufficient viscosity indicators, dynamic polymer filtration reducers (starch, shear stress and plastic viscosity, that polyanionic cellulose (PAC), carboxymethylcellulose limits its use when drilling horizontal wells; insufficient heat resistance of wells; insufficient heat resistance of (KMOEC), oxyethylcellulose (OEC), hydrolyzed limits its use when drilling in complex polyacrylonitrile (hypane) ). mining and geological conditions (including in chemical deposits and at elevated temperatures). allows to reduce the amount and concentration of com-

The task of this invention is to reduce the number of components in the drilling mud due to the fluidity and concentration of the components for the preparation of which they simultaneously perform several functions of the drilling mud while preserving the inhibiting, lubricating properties. protective, filtering and anti-sticking properties. In the proposed technical solution, increasing the structural and rheological properties of fatty acid niamids perform the function of surface properties and heat resistance, providing a drying-active substance that allows ensuring resistance, reducing the harmful impact on the environment you have high inhibitory properties due to the environment. hydrophobization of the particle surface, which causes them

In order to solve the problem of rejection from the aqueous phase, and the function of lubricating biopolymer drilling fluid, which contains anti-adherent and anti-adherent impurities due to a large polymer filtration reducer (starch), bio-adsorption capacity on metal surfaces and the formation of polymer, surface-active substance, lubrication of a dense, strong monomolecular layer, flax admixture and water, according to the invention, as a surface, which allows it to be used effectively at low concentrations of the active substance and lubricating admixture. contains ethylenediamides of fatty acids (a product of ethylenediamine and phosphatide condensation on the basis of natural, unbranched, paired citrate), as a polymer filter reducer of fatty acids, in addition to the above properties, polyanionic cellulose (PAC) or carboxymethyl- perform an anti-enzymatic function, are biodegradable- carboxymethyl oxyethyl cellulose (KMU), or they are non-toxic and harmless to the environment, and thus prevent oxyethyl cellulose (OC), or hydrolyzed poly- enzymatic destruction of polymeric ( polysaccharide-acrylonitrile (hypane), while additionally containing liquid) reagents. humates of alkali metals (carbon-alkaline reagent To increase the inhibitory properties and (VLR) or humate-potassium reagent (GKR)) and salts, providing the possibility of use during drilling of alkaline and/or alkaline earth metals (KSI, mass, in difficult mining and geological conditions (in so do-

Sasi", Mossig, bischophyte) in the following ratio in chemogenic sediments and with increased darkening of components, mass. 9o: temperatures) add salts of alkaline and/or alkaline earth media

talivs (KSI, Masi, Sasig, MosSi", Bishofit, etc.). metals Exceeding concentration over 1.090

The biopolymer base of the drilling fluid is economically and technologically impractical (see table 11.

Oyomiv, Riomiv5, Nadoroi, 2irozap and others. They are ev- Addition of ethylenediamines of fatty acids is less water-soluble powdery polys- 0.0596 is ineffective, because we get reductions obtained by treatment with bacteria of the type "xan- sion of lubricating, inhibiting, anti-sticking tamonas". and anti-enzymatic properties, and an increase

As a polymer filtration reducer, the use of edible starch according to TU-2483-002-3,095 is impractical due to the fact that the improvement of 41668452-97 or other modifications of starch or these properties practically does not occur (see polyanionic cellulose (Roiuras I or K), or card- table 2). boxymethylcellulose (Kamcel, Tuiose, Rippiykh to- Research has determined that ethylenediamides that), or carboxymethyloxyethylcellulose (СНЭ-1, fatty acids are non-toxic and belong to

START-6, etc.), or oxyethyl cellulose, or hydrolyzed reagents of the fourth class of danger. polyacrylonitrile (hypane according to TU U The inhibitory effect of salts, as is known, is clearly manifest- 31062554.02-2001) and their various modifications and is marketed starting from a concentration of 3.095, which is the brand. spoken lower concentration threshold. Due to the high

Ethylenediamides of fatty acids are produced according to the salt resistance formula of the drilling mud

TU U 24.6-32028975-005-2004, as reagents used - the upper threshold of the concentration of salts is limited only to the phosphatide concentrate - a product with a limit of their solubility in water, which makes it possible for oil and fat production, which is a mixture, to use such a solution when drilling in chemo - triacylglycerides and phospholipids, and ethylenediamine deposits. min. Static filtration was determined on the device

As humates of alkali metals, a Fann filter press according to the standard of the American Institute of Carbon Alkaline reagent according to TU U 36-01-247-76 or the Petroleum Institute (ANI) is used. humate-potassium reagent according to TU U 26.8-23690792- Filtration index at a temperature of 1407С 0О2-2001. at a pressure drop of 7MPa was determined on the device

Salts of alkaline and/or alkaline earth metals VTVT - high temperature / high pressure (for sta- (KSI, mass, Sasi, MosSi, Bischofite) are obtained according to: NDART ANI), which reproduces the conditions for drilling wells

KSI according to DOST 4568-95, Masi according to DOST 13830-68, depths of about 5000 m.

Sasi" according to DOST 450-77, ModSig or bishofit according to DOST. Within the declared ratios of concentration - 7759-73. of these components, all formulations of biopolymer drilling

An example of the preparation of a biopolymer drilling fluid is sufficiently heat-resistant, which follows from it in laboratory conditions. a significant increase in the filtration rate, which

After heating at a temperature of 15070, the hydration of 5 g of xanthan-type biopolymer is carried out in 900 ml of water with stirring for 4 hours (see item 1-10 of table 11.) for 15 minutes, then add 50 g of VLR or GKR and 2 g Lubricants and anti-stick properties of starch or PAC, or KMC, or KMOEC, or were measured using the "I irgisyu Tevieg" device

OEC, or hydrolyzed polyacrylonitrile, ethyl-American firm "Ragt Ipzigitepi Co" and non-diamides of fatty acids (EDHK)-30g and mixed with the help of the KTK device. for 15-30 minutes, then add 70g of KSI or Inhibitory properties were tested by mass method, or Sasi", or Modsi", or Bischofite. After running-in of the core material in a roller furnace while dissolving the salts, biopolymer drilling mud at a temperature of 1007"C for four hours. In the ready-to-use quality samples, argillite was used. After

Table 1 shows examples of the preparation of a sample roller in distilled water of the remaining biopolymer drilling mud at different concentrations of core material, and after running-in in bioconcentrations of the components. polymer drilling fluid 95.7-97.595 (see

Table 2 shows data on lubricants, pos. MoMe1-10 table 21, which testifies to the significant inhibitory, anti-adhesion properties of the biopolymer- improvement of the inhibitory properties of the proposed drilling fluid at different concentrations of the fluid. components. The anti-enzymatic effect of ethylene diamides of fatty acids

A decrease in the biopolymer concentration to 0.295 and the slot was determined by the number of aerobic bacteria

VLR/or GKR up to 3.095 has a negative effect on the structure of the biopolymer reagent solution for auxiliary rheological properties (see positions MeMe2, with indicators Zapimspesk AB of the Viozap company in Table 1), while the stability of the solution decreases. ". Samples collected in plastic bags containing salts of alkaline and alkaline earth metals were left for incubation for 36 hours at high temperatures. Increasing the concentration at a temperature of 36"С, the number of bacteria in a solution of 100 biopolymer is higher than 0.595, and the VLR or GKR is higher than 6.095 per 1 ml, at a concentration of 0.5-195. It is impractical because the costs of chemical reactions increase. The technical result of the use of agents, and structurally - the rheological and filtration properties of the proposed biopolymer drilling mud are not significantly improved (see obtaining high structural and rheological properties, MoMo7-10 of Table 11. properties, increasing inhibitory, lubricating,

The use of polymer filter-filtering and anti-sticking properties of the walkie-talkie in the given concentrations ensures low drilling fluids while reducing the amount and filtration coefficient of biopolymer drilling decentration of components, increasing their resistance to action even under conditions of aggression of polyvalent salts of high temperatures and concentrations of alkali salts -

them and alkaline earth metals, improvement of an- in deposits and at elevated temperatures), as well as tifermentative properties. inclined and horizontal sections

The implementation of the proposed biopolymer wells, to reduce the harmful effect on the natural drilling fluid will allow to reduce the costs of the environment, to improve the technical and economic chemical reagents during drilling in complex mining- drilling indicators. geological conditions (including chemogenic ones

Table 1

Examples of preparation of biopolymer drilling mud at different concentrations of components

The amount of biopolymeric drilling mud assoclad oyupolymer raw mud, mass. At -20C After warming up 4411-1500

Me Sasi"/ | Gipan p/p vVLR KMmo masses! Mosi", |(on dry.|Krozh| ED F, snztomoi p, | 7, tt, sh snztomo i, | 7,

BP or (IPATSKMCTSI is, | LKSIII bisho- | Recho |mal| ZhK |2M7) dpa Impa|dpa|sis|M/| dpa |mpa| dpa

GKR fit wine Zohv d Zohv d

Ir with ol! | | | Central Central Bureau of Investigation | | 005148 1277 | 18), 25 |z0I28|68| 5 v8lo 22 with | 0! | HER | (U B yuyuZYI | ol |48| vl 12/14 32 z | | | | 1 ЮЙ yuYushch RUK 04 | 1 158 7/2 PE 4rzi 5 | | 02! 7 шЩ | | | 715 Щ|45| 29/37 45/62 5r35| | | 02! z| | | | 15 | 47| z1m9 ЗB/B2 6 ra 5 | 02| | | 126! VG | | | 2 | 70| 5763 | 69 | 95 | 60155| 65| 51/58 60) vu 7 ro 6 03! | | | | 40 | | | 2 |67| 7282 |i20|167|85I72| 8 | 70/85 8 ro 6 | | | 03! | tho | | | 25 |651| 75/85 67/81 95 6 |02| | | 126! | | | with |62| /mvo | 21 | 49|7l|68| 5 | 627 | 18 | 140 lo re 6 | | | | 26! | || 715 | 4 | 55/z 49/71 pe 151 but | 12 | 18 |65 ISO 15 o5 |5| in x prototype: starch - 195, biopolymer - 0.395, polyglycol PEG-400-395, DSB-515-0.595, PKD-515-1.595, chalk - 595, SasSio-395, Masi - 2096.

Table 2

Data on the lubricating, inhibiting, anti-seize properties of biopolymer drilling fluid at different concentrations of components

Ме розчину із таблиці 1 Вимірювані властивості й Змащувальні, (КТ Протиприхватні, Ампер Інгібуючі, 905 711117176111111111117117171771717171717171110ол277|777717171717171717171713277771 1965 11771110 | 77777132 9690 11117811111111111171711111111омт111711111111111126111111111117111973 ни нини хо нах и т КИ

Computer layout V. Matselo Signature Circulation 26 approx.

Ministry of Education and Science of Ukraine

State Department of Intellectual Property, str. Urytskogo, 45, Kyiv, MSP, 03680, Ukraine

SE "Ukrainian Institute of Industrial Property", str. Glazunova, 1, Kyiv - 42, 01601