Ohio Administrative Code › Title 1501:9 - Division of Mineral Resources Management - Oil and Gas › Chapter 1501:9-11 - Plugging of Wells › Section 1501:9-11-01 - Definitions

Current through all regulations passed and filed through July 1, 2024
As used in Chapter 1501:9-11 of the Administrative Code:
(A) "Big lime" means all geologic formations
			 above the Silurian Rochester Shale and below the Devonian Olentangy Shale.
(B)
			 "Brush and stone bridge" means an obstruction made of timber and stone and
			 placed in a well bore to form an effective base for plugging
			 material.
(C) "Casing" means
			 lengths of steel pipe coupled or connected together to form a continuous
			 conduit in the well bore.
(D) "Cement" means a
			 complex, finely-ground kiln-fired calcium silicate that when mixed with water
			 forms a slurry that will harden in the borehole to form an effective seal
			 between the well bore and casing or tubing, or to effectively seal formations
			 penetrated by the well bore.
(E) "Clay" means, for
			 purposes of paragraph (H) of rule
			 1501:9-11-07 of the
			 Administrative Code, any material with a particle size of 4.0 microns or less
			 and the sand fraction will be all particles with a grain size exceeding 62.5
			 microns.
(F) "Drilling Mud"
			 means any mixture of water, bentonite, and/or clay to form a slurry as commonly
			 used in the oil and gas industry.
(G) "Fine grout" means
			 a mix of: Portland type I, II or III cement manufactured to meet ASTM
			 "C150/C150M/C595" standards or API "10 A
			 Specification for Cements and Materials for Well Cementing;" water and sand
			 that meets ASTM "C-33" standards and specifications.
(H) "Fresh water
			 strata" means all unconsolidated rock material or sedimentary rock containing
			 water with less than ten thousand milligrams per liter total of dissolved
			 solids.
(I) "Identification
			 tag" means a brass or steel plate with the initials ODNR and the plug permit
			 number legibly braised, burned, or stamped in the surface that is affixed on
			 top of the casing.
(J) "Long string" means
			 any casing placed in the well bore for the purpose of protecting the producing
			 zones.
(K) "Mechanical bridge
			 plug" means a manufactured device designed to seal the well bore or inside
			 diameter of any diameter of casing that may be used as a base for approved
			 plugging material.
(L) "Mineable coal
			 seam" means any underground coal seam of sufficient thickness that may be
			 economically mined by current mining methods.
(M) "Plugging plan"
			 means a written plan that includes all information 
								set forth
			 in section 1509.13 of the Revised Code in
			 addition to all of the following:
(1) The
			 diameter of each uncased segment of the wellbore;
(2) The length, weight, and outer diameter of
			 each casing string in the well;
(3)
			 The depth to the base and top of the cemented interval of each casing
			 string;
(4) The base and top of any
			 mineable coal seams;
(5) The name,
			 if known, and depth to the base and top of the deepest underground source of
			 drinking water;
(6) The depth to
			 the base and top of each reservoir rock, thief zone, underground mine zone,
			 karst void, or mineable coal seam that will be plugged or isolated;
(7) The proposed depth to the top and base of
			 each plug;
(8) The class of cement to be used to plug
			 the well;
(9) The yield and optimum
			 slurry density for each cement plug; and
(10) If the well will be plugged with an
			 approved clay, the total weight of clay in tons that will be emplaced across
			 each interval plugged.