EOG Resources, Inc: Omissions of quantity data

Summary: FracFocus disclosures that omit fundamental quantity information undermine the integrity of the fracking chemical data. Open-FF (1) found that the operator EOG Resources, Inc. published 2889 disclosures with quantity data missing for at least some records. It was among companies publishing the most records with no quantity data. We summarize those omissions here.

A chemical disclosure instrument such as FracFocus depends on accurate and complete data. Individual disclosures with poor or missing data can erode the trust of users for the entire system. FracFocus, unfortunately, has many disclosures with missing data. This post is part of Open-FF’s effort to improve FracFocus data integrity and to alert stakeholders to these data weaknesses.

Along with the identity of a chemical used in a fracking operation, the quantity is critical information. The range of material quantities reported in FracFocus stretches from less than one pound to over a million pounds. When quantity data is missing, a reader of a disclosure won’t be able to tell if, say, a hydrochloric acid record is for one pound or one million pounds – the difference between a small jar’s worth and many tanker trucks full.

We’ve found many such data omissions (2) in the disclosures of the operating company, EOG Resources, Inc.. As of this date, we’ve found 2889 disclosures with at least one omission. That is 35.6% of all of the company’s disclosures. The following chart shows when those fracking jobs occurred and how many records were missing data.

More than half of all operators reporting to FracFocus had NO records with quantity omissions. In the following graph, each point is an operator. The companies without omissions are not on this graph. Just 25% of companies are above the horizontal line, and 25% to the right of the vertical line. EOG Resources, Inc. is highlighted in orange. Clearly a small fraction of companies account for much of the lacking records and EOG Resources, Inc. is part of that club.

Which states

These flawed disclosures are for fracking jobs in the following states.

State	number of disclosures with omissions
Texas	2141
New Mexico	339
North Dakota	158
Oklahoma	125
Wyoming	102
Pennsylvania	14
Louisiana	4
Ohio	2
Montana	2
Utah	1
Colorado	1

Which Chemicals

The following table lists the materials for which quantity was omitted and how many records of EOG Resources, Inc. were affected.

CASRN	Name	Molecular structure	Number of missing values
79-06-1	Acrylamide		550
10604-69-0	Ammonium acrylate		331
14808-60-7	Quartz (SiO2)	no image	320
67-63-0	Isopropanol		303
9014-01-1	Subtilisin	no image	283
67-56-1	Methanol		280
68585-34-2	Poly(oxy-1,2-ethanediyl), alpha-sulfo-omega-hydroxy-, C10-16-alkyl ethers, sodium salts	no image	259
1310-73-2	Sodium hydroxide		228
9004-32-4	Edifas B	no image	186
68551-12-2	Alcohols, C12-16, ethoxylated	no image	182
107-21-1	Ethylene glycol		170
1338-43-8	Sorbitan, mono-(9Z)-9-octadecenoate		167
64742-47-8	Distillates (petroleum), hydrotreated light	no image	166
2836-32-0	Glycolic acid sodium salt		158
590-29-4	Formic acid, potassium salt		145
25322-68-3	Polyethylene glycol		145
57-55-6	1,2-Propylene glycol		144
1333-73-9	Sodium borate	no image	132
111-30-8	Glutaraldehyde		129
50-00-0	Formaldehyde		129
68002-97-1	Ethoxylated C10-16 alcohols	no image	120
12125-02-9	Ammonium chloride		117
7647-01-0	Hydrochloric acid		116
64-17-5	Ethanol		108
68439-46-3	Alcohols, C9-11, ethoxylated	no image	93
64476-38-6	Apatite	no image	92
1310-14-1	Goethite (Fe(OH)O)	no image	92
1302-27-8	BIOTITE	no image	92
12173-60-3	Illite	no image	92
98072-94-7	Ilmenite (FeTiO3), conc.	no image	92
34590-94-8	Dipropylene glycol monomethyl ether		87
7757-82-6	Sodium sulfate anhydrous		87
68439-50-9	Alcohols, C12-14, ethoxylated	no image	85
25987-30-8	2-Propenoic acid, polymer with 2-propenamide, sodium salt	no image	80
11138-66-2	Corn sugar gum	no image	80
66455-14-9	Alcohols, C12-13, ethoxylated	no image	79
68424-85-1	C12-16-Alkylbenzyldimethylammonium chlorides		73
9005-65-6	Polysorbate 80	no image	65
78330-21-9	Alcohols, C11-14-isoalcohols, C13-rich, ethoxylated	no image	65
10222-01-2	2,2-Dibromo-3-nitrilopropionamide		59
27176-87-0	Dodecylbenzenesulfonic acid		58
68953-58-2	Quaternary ammonium compounds, bis(hydrogenated tallow alkyl)dimethyl, salts with bentonite	no image	56
108-32-7	Propylene carbonate		55
1184-78-7	N,N-Dimethyl-methanamine-N-oxide		55
7173-51-5	Didecyldimethylammonium chloride		50
57-13-6	Urea		48
111-46-6	Diethylene glycol		48
68410-62-8	Ethoxylated naphthenic acids	no image	45
9005-67-8	Polysorbate 60	no image	42
111-76-2	2-Butoxyethanol		42
107-19-7	Propargyl alcohol		42
61790-12-3	Fatty acids, tall-oil	no image	41
56-81-5	Glycerol		41
60-24-2	2-Mercaptoethanol		39
15821-83-7	2-Butoxy-1-propanol		39
68527-49-1	Thiourea, polymer with formaldehyde and 1-phenylethanone	no image	38
1303-86-2	Boron oxide (B2O3)		37
64-18-6	Formic acid		37
8028-48-6	Orange terpenes	no image	37
61791-26-2	PEG-10 Hydrogenated tallow amine	no image	36
5989-81-1	alpha-Lactose monohydrate		35
8002-43-5	Lecithin	no image	35
119345-04-9	Benzene, 1,1′-oxybis-, tetrapropylene derivs., sulfonated, sodium salts	no image	34
9003-11-6	Poloxalene	no image	33
1309-42-8	Magnesium hydroxide		32
1319-33-1	Ulexite	no image	32
1113-55-9	2-Bromo-3-nitrilopropionamide		30
68951-67-7	Alcohols, C14-15, ethoxylated	no image	28
26266-58-0	Sorbitan trioleate	no image	28
71011-25-1	Quaternary ammonium compounds, benzyl(hydrogenated tallow alkyl)dimethyl, bis(hydrogenated tallow alkyl)dimethylammonium salt with bentonite	no image	28
68990-47-6	Fatty acids, tall-oil, reaction products with diethylenetriamine, maleic anhydride, tetraethylenepentamine and triethylenetetramine	no image	28
7447-40-7	Potassium chloride		28
12045-78-2	Boron potassium oxide (B4K2O7), tetrahydrate		27
8042-47-5	White mineral oil, petroleum	no image	27
77-92-9	Citric acid		26
7783-20-2	Ammonium sulfate		25
64-19-7	Acetic acid		25
84133-50-6	Alcohols, C12-14-secondary, ethoxylated	no image	25
7446-09-5	Sulfur dioxide		24
7722-76-1	Ammonium phosphate		24
127087-87-0	Poly(oxy-1,2-ethanediyl),alpha-(4-nonylphenyl)-omega-hydroxy-,branched	no image	24
104-55-2	3-Phenylprop-2-enal		24
120313-48-6	Alcohols, C12-15-branched and linear, ethoxylated propoxylated	no image	24
25085-02-3	Acrylamide-sodium acrylate copolymer	no image	24
7681-82-5	Sodium iodide		23
144-55-8	Sodium bicarbonate		23
540-72-7	Sodium thiocyanate		22
7664-93-9	Sulfuric acid		22
13446-12-3	Ammonium hydrogen phosphonate		21
3252-43-5	Dibromoacetonitrile		21
9025-56-3	Hemicellulase	no image	20
9003-04-7	Sodium polyacrylate		20
9000-30-0	alpha-D-Galactopyrano-beta-D-mannopyranan	no image	20
9051-89-2	1,​4-​Dioxane-​2,​5-​dione, 3,​6-​dimethyl-​, (3R,​6R)​-​, polymer with rel-​(3R,​6S)​-​3,​6-​dimethyl-​1,​4-​dioxane-​2,​5-​dione and (3S,​6S)​-​3,​6-​dimethyl-​1,​4-​dioxane-​2,​5-​dione	no image	19
112926-00-8	Hydrated silica	no image	19
73003-80-2	2,2-Dibromopropanediamide		18
68649-44-5	Ethanol, 2-amino-, reaction products with ammonia, by-products from, phosphonomethylated	no image	18
69418-26-4	Polyquaternium-33	no image	18
121888-68-4	Bentonite, benzyl(hydrogenated tallow alkyl) dimethylammonium stearate complex	no image	18
9004-96-0	Poly(oxyethylene) monoleate		18
6381-77-7	Sodium erythorbate		17
64-02-8	Ethylenediaminetetraacetic acid tetrasodium salt		17
9043-30-5	Polyoxyethylene isotridecyl ether		16
10043-52-4	Calcium chloride		15
68442-77-3	2-Butenediamide, (2E)-, N,N’-bis[2-(4,5-dihydro-2-nortall-oil alkyl-1H-imidazol-1-yl)ethyl] derivs.	no image	15
68155-20-4	Tall-oil fatty acid DEA	no image	15
71050-62-9	2-Propenoic acid, polymer with sodium phosphinate	no image	14
68584-22-5	(C10-C16) Alkylbenzenesulfonic acid		14
61723-83-9	Polyoxyethylene sorbitol tetraoleate	no image	14
5064-31-3	Glycine, N,N-bis(carboxymethyl)-, trisodium salt		14
910644-97-2	2-Propenoic acid, ammonium salt (1:1), polymer with 2-propenamide, sodium salt	no image	13
7722-84-1	Hydrogen peroxide		13
111-42-2	Diethanolamine		12
77-89-4	Citric acid, triethyl ester, acetate		12
127-08-2	Potassium acetate		12
68551-13-3	C12-15 ethoxylated propoxylated alcohols	no image	12
1302-78-9	Bentonite	no image	11
26100-47-0	Ammonium acrylate-acrylamide copolymer	no image	10
78-40-0	Triethyl phosphate		10
108-24-7	Acetic anhydride		10
1309-48-4	Magnesium oxide		10
67-64-1	Acetone		10
29316-47-0	Formaldehyde, polymer with 4-(1,1-dimethylethyl)phenol and methyl oxirane	no image	10
68648-87-3	Benzene, C10-16-alkyl derivatives	no image	10
14452-57-4	Magnesium peroxide (Mg(O2)​)		10
63428-92-2	Ethylene oxide-formaldehyde-p-nonylphenol-propylene oxide copolymer	no image	10
111-87-5	1-Octanol		10
7664-38-2	Phosphoric acid		9
124-38-9	Carbon dioxide		9
471-34-1	Calcium carbonate		9
8007-43-0	Sorbitan sesquioleate	no image	9
7727-37-9	Nitrogen		9
7758-19-2	Sodium chlorite		9
1310-58-3	Potassium hydroxide		9
123-91-1	1,4-Dioxane		8
68412-54-4	Polyoxyethylene branched-C9-alkylphenol	no image	8
8001-79-4	Castor oil	no image	8
68911-87-5	Quaternary ammonium compounds, bis(hydrogenated tallow alkyl)dimethyl, salts with montmorrillonite ((Al1.22-1.67Mg0.33-0.67)(Ca0-1Na0-1)0.33Si4(OH)2O10.xH20))	no image	8
71-36-3	1-Butanol		8
112-30-1	1-Decanol		8
75-56-9	(+/-)-1,2-Propylene oxide		8
75-07-0	Acetaldehyde		7
75-21-8	Ethylene oxide		7
93-83-4	Oleic acid diethanolamide		7
7631-86-9	Silica		7
7681-52-9	Sodium hypochlorite		7
67254-71-1	Alcohols, C10-12, ethoxylated	no image	7
5989-27-5	D-Limonene		7
68133-47-1	1,3-Propanediol, 2-amino-2-(hydroxymethyl)-, polymer with 2-methyloxirane and oxirane	no image	7
139-13-9	Nitrilotriacetic acid		7
56449-46-8	Poly(oxyethylene) oleyl ester	no image	7
68-12-2	N,N-Dimethylformamide		6
870-72-4	Sodium hydroxymethanesulfonate		6
7772-98-7	Sodium thiosulfate		6
55566-30-8	Tetrakis(hydroxymethyl)phosphonium sulfate		6
73138-29-1	Alkanes,C10-C18	no image	6
7727-54-0	Diammonium peroxydisulfate		6
24937-78-8	Vinyl acetate ethylene copolymer	no image	6
7757-83-7	Sodium sulfite		6
9005-25-8	Starch	no image	6
61789-71-7	Quaternary ammonium compounds, benzylcoco alkyldimethyl, chlorides	no image	5
7681-38-1	Sodium hydrogen sulfate		5
62649-23-4	Poly (acrylamide-co-acrylic acid), partial sodium salt	no image	5
10043-35-3	Boric acid (H3BO3)		5
92908-33-3	Ulexite, calcined	no image	5
94266-47-4	Citrus extract	no image	5
7664-41-7	Ammonia		5
63800-37-3	Sepiolite	no image	5
584-08-7	Potassium carbonate		4
26172-55-4	5-Chloro-2-methyl-3(2H)-isothiazolone		4
10377-60-3	Magnesium nitrate		4
629-50-5	Tridecane		4
7786-30-3	Magnesium dichloride		4
68155-39-5	Amines, C14-18; C16-18-unsaturated, alkyl, ethoxylated	no image	4
1120-21-4	Undecane		4
68937-66-6	Alcohols, C6-12, ethoxylated propoxylated	no image	4
121-43-7	Trimethyl borate		4
67-48-1	2-Hydroxy-N,N,N-trimethylethan-1-aminium chloride		4
17593-73-6	[(Carboxymethyl)amino]acetate		4
112-40-3	Dodecane		4
38193-60-1	Acrylamide-sodium-2-acrylamido-2-methlypropane sulfonate copolymer	no image	4
64742-55-8	Distillates, petroleum, hydrotreated light paraffinic	no image	4
69227-22-1	Alcohols, C10-16, ethoxylated propoxylated	no image	4
9003-05-8	Polyacrylamide		3
7783-28-0	Diammonium hydrogen phosphate		3
9016-45-9	Nonylphenoxypolyethoxyethanol		3
1302-76-7	Kyanite (Al2O(SiO4))	no image	3
15619-48-4	1-Benzylquinolinium chloride		3
91-20-3	Naphthalene		3
12174-11-7	Attapulgite	no image	3
2682-20-4	2-Methyl-3(2H)-isothiazolone		3
95-63-6	1,2,4-Trimethylbenzene		3
186614-90-4	Phosphonic acid, [[[2-[(2-hydroxyethyl)(phosphonomethyl)amino]ethyl]imino]bis(methylene)]bis-, ammonium salt	no image	3
100-97-0	Methenamine		3
64742-94-5	Solvent naphtha, petroleum, heavy arom.	no image	3
10486-00-7	Sodium perborate tetrahydrate		3
631-61-8	Ammonium acetate		3
72480-70-7	Tar bases, quinoline derivatives, benzyl chloride-quaternized	no image	3
68991-52-6	C10-16 alkenes	no image	3
64743-02-8	Alkenes, C>10 alpha-	no image	2
1330-20-7	Xylenes		2
14807-96-6	Talc	no image	2
14464-46-1	Cristobalite	no image	2
497-19-8	Carbonic acid sodium salt (1:2)		2
68603-42-9	Amides, coco, N,N-bis(hydroxyethyl)	no image	2
141-53-7	Sodium formate		2
9002-84-0	Polytetrafluoroethylene		2
64742-54-7	Distillates, petroleum, hydrotreated heavy paraffinic	no image	2
64742-65-0	Distillates, petroleum, solvent-dewaxed heavy paraffinic	no image	2
13709-94-9	Potassium metaborate		2
70142-34-6	Polyoxyl 15 hydroxystearate	no image	2
68815-65-6	1,2-Ethanediamine, N1-(2-aminoethyl)-N2-[2-[(2-aminoethyl)amino]ethyl]-, polymer with 2-methyloxirane and oxirane	no image	2
129828-36-0	Ethanol, 2-amino-, [[[2-[(2-hydroxyethyl)(phosphonomethyl)amino]ethyl]imino]bis(methylene)]bis[phosphonate] (salt)	no image	2
67701-32-0	Glycerides, C14-18 and C16-18-unsatd. mono- and di-	no image	2
127-09-3	Sodium acetate		2
25038-72-6	Vinylidene chloride/methylacrylate copolymer	no image	2
7447-39-4	Copper(II) chloride		2
26006-22-4	Acrylamide-methacryloxyethyltrimethylammonium methylsulfate copolymer	no image	2
5470-11-1	Hydroxylamine hydrochloride		2
2673-22-5	Sodium ditridecylsulfosuccinate		2
68476-34-6	Fuels, diesel, No. 2	no image	2
1344-28-1	Alumina	no image	1
68647-72-3	Terpenes and Terpenoids, sweet Orange-oil	no image	1
9014-93-1	Nonyl nonoxynol-10	no image	1
104-76-7	2-Ethyl-1-hexanol		1
67762-41-8	C10-16 Alcohols		1
119-36-8	Methyl salicylate		1
515-98-0	Ammonium lactate		1
102-71-6	Triethanolamine		1
24938-91-8	Polyoxyethylene tridecyl ether		1
68139-75-3	Fatty acids, C18-unsatd., dimers, polymers with diethylenetriamine and tall-oil fatty acids	no image	1
526-73-8	1,2,3-Trimethylbenzene		1
533-74-4	Dazomet		1
74499-34-6	Alcohols, C12-15, propoxylated	no image	1
61791-14-8	Amines, coco alkyl, ethoxylated	no image	1
7775-27-1	Sodium persulfate		1
70851-08-0	Amides, coco, N-[3-(dimethylamino)propyl], alkylation products with sodium 3-chloro-2-hydroxypropanesulfonate	no image	1
9003-35-4	Bakelite	no image	1
70714-66-8	[[(Phosphonomethyl)imino]bis[2,1-ethanediylnitrilobis(methylene)]]tetrakis-phosphonic acid, ammonium salt (1:x)		1
15468-32-3	Tridymite	no image	1
154518-36-2	Alcohols, C9-11-iso-, C10-rich, ethoxylated propoxylated	no image	1
15220-87-8	Propylene pentamer		1
5131-66-8	1-Butoxy-2-propanol		1
89-65-6	Isoascorbic acid		1
108-67-8	1,3,5-Trimethylbenzene		1

The numbers in this post reflect a FracFocus data set downloaded in January 2025. For more up-to-date statistics, visit this link.

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Endnotes

1. Open-FF is a public service project, independent of FracFocus, that aims to foster better understanding of chemical uses of the fracking industry by organizing and analyzing chemical disclosures of FracFocus. To see company-specific information about EOG Resources, Inc., visit this page.
2. The values that are omitted are in the “PercentHFJob” data field which represents the percentage (by mass) of the total fracking fluid. This number is usually less that 1% but because the mass of the total fluid is enormous – often greater that 100 million pounds – the actual mass of the chemical component can be quite large.
3. Title image credit: Becky Mansfield, modified by author
4. Chemical images credit: EPA Comptox