Texola Drilling Company, Inc., brought this action to recover from Oklahoma Natural Gas Company1 an amount alleged to be due from the production of a natural gas well owned jointly by the parties. In 1940, Texsun Drilling Company, an Oklahoma corporation, and Oklahoma Natural were the owners of certain oil and gas leases covering eighty acres of land in the Chickasha Gas Field, described as the N1/2SW1/4 of Section 23, Township 5 North, Range 8 West, Grady County, Oklahoma. The parties entered into an agreement for the purpose of joint development and operation of the combined leases to depths below three thousand five hundred feet. The Texsun Drilling Company was to receive thirty-eight percent plus of the net proceeds from the sale of oil and gas produced from the leases. A producing gas well known as 'Sanford 1-B' was drilled under the terms of the agreement. Thereafter, Texola acquired the rights of Texsun Drilling Company.

Oklahoma Natural was the operator of the well and, unknown to Texola, arranged for an increased allowable by attributing to the well a portion of a contiguous lease which it owned. After the increased allowable, Oklahoma Natural made payments to Texola according to a formula which reduced the percentage of the total production proportionately with the increased allowable, but the payments to Texola were substantially the same as before the increase. This appeal is from a judgment in favor of Texola for the full contract percentage.

There is very little dispute as to the facts. The agreement herein referred to fixed the ownership of the parties in the well and the production therefrom. The well drilled on the combined leases produced gas from the Charlson Sand Zone and was described as one of the largest natural gas wells in Oklahoma, if not in the world. On October 30, 1947, the Commission promulgated and entered its Order No. 20536 which established the productive limits of the different sands in this field. The order also prescribed a production and allocation formula for the ratable taking of gas from the respective producing horizons with an established acreage factor. The map attached to and made a part of the order showed that forty-one acres of the leases covered by the contract were within the productive zone of the Charlson sand. The production allowable for the well was fixed accordingly.

Oklahoma Natural was the sole owner of an oil and gas lease on forty acres of land adjoining the combined leases and described as the SE1/4 of the SW1/4 of Section 23, Township 5 North, Range 8 West. Eighteen and one-half acres of this lease were within the established productive limits of the Charlson Sand Zone but were undeveloped and not attached to any well for production. During the month of February, 1949, Oklahoma Natural discussed the acreage allowable for the well with the Director of Conservation Department of the Commission, with a result that the original forty-one acre allowable was increased to forty-four and one-half acres, and the eighteen and one-half acres belonging to Oklahoma Natural were attributed or attached to the well of the parties for production. The allowable was then increased on the basis of sixty-three acres. Oklahoma Natural recomputed the percentages of interest i the increased production to which each of the co-owners was entitled in accordance with the new acreage factor and made payments to Texola on that basis. The effect of this recomputation was to reduce Texola's participation percentage in the production as provided for in the contract from thirty-eight percent plus to twenty-seven percent plus. These changes were accomplished without the knowledge or consent of Texola, and without a hearing before the Commission.2 The case was tried to the court without a jury which held that the attribution of the eighteen and one-half acres to the jointly-owned well was 'unauthorized and illegal and did not change the terms of the contract involved', and that Texola was entitled to receive the contract percentage for the total production.

Since 1913, Oklahoma has regulated the taking of natural gas from underground sources. Its statutes provide that the State Corporation Commission shall prescribe rules and regulations to regulate the taking of natural gas from common sources of supply to prevent waste, protect the interest of the public, and prevent unreasonable discrimination between those entitled to produce from the common source of supply. 52 O.S.A. § 239.3

The Commission has the power and authority to define and fix the boundaries of any common source of supply of gas in the state. Anderson-Prichard Oil Corp. v. Corporation Commission, 205 Okl. 672, 241 P.2d 363, appeal dismissed, 342 U.S. 938, 72 S. Ct. 562, 96 L. Ed. 698; Cities Service Gas Co. v. Peerless Oil & Gas Co., 203 Okl. 35, 220 P.2d 279, affirmed340 U.S. 179, 189, 71 S. Ct. 215, 95 L. Ed. 190; Application of Moran, 201 Okl. 43, 200 P.2d 758; Republic Natural Gas Co. v. State, 198 Okl. 350, 180 P.2d 1009.

It has the authority to provide for a ratable taking of gas to protect the correlative rights of those entitled to take from a common source of supply. Oklahoma Natural Gas Co. v. Choctaw Gas Co., 205 Okl. 255, 236 P.2d 970; Paterson v. Stanolind Oil & Gas Co., 182 Okl. 155, 77 P.2d 83; appeal dismissed, 305 U.S. 376, 59 S. Ct. 259, 83 L. Ed. 231. But the Commission has only such authority as is expressly, or by necessary implication, conferred upon it by the Constitution and the statutes, ans such power must be exercised in strict conformity with the grant of power. Carter Oil Co. v. State, 205 Okl. 541, 240 P.2d 787; Oklahoma Natural Gas Co. v. Choctaw Gas Co., 205 Okl. 255, 236 P.2d 970; Southwestern Light & Power Co. v. Elk City, 188 Okl. 540, 111 P.2d 820; H. F. Wilcox Oil & Gas Co. v. Walker, 168 Okl. 355, 32 P.2d 1044. After a full and complete hearing, the Commission, by its Order No. 20536, established the boundaries or the productive limits of the common source of supply of the Chickasha Gas Field and attributed different acreages to wells for production. Forty-one acres of the jointly owned lease of the parties hereto were found to be within the productive limits of the field and were attributed to the well drilled on the leases which entitled the parties to their ratable share of gas to be taken from the common source of supply. The validity of this order has been upheld by the Supreme Court of Oklahoma in two different cases. Anderson-Prichard Oil Corp. v. Corporation Commission, supra; Application of Little Nick Oil Company, 208 Okl. 695, 258 P.2d 1184. The acreage within the fixed boundaries generally determines the allowables which the owners may take gas from the common reservoir. The boundaries may be changed as actual drilling progresses and further geological data is obtained. There may be changes in the acreage attributed to any well, but these are judicial determinations to be made by the Commission only after a hearing at which those claiming correlative rights or interests in the common supply have had an opportunity to be heard. Application of Little Nick Oil Company, supra. The eighteen and one-half acres belonging to Oklahoma Natural, although within the productive limits of the field, were not attributed to any well in the original order. Oklahoma Natural owned the acreage and had the legal right to produce the gas from the common supply according to the established acreage factor, but it had no right to attach the acreage to any well and produce therefrom without a formal hearing before the Commission itself, and this requirement cannot be satisfied by the ex parte action of the Director of Conservation. Application of Little Nick Oil Company, supra.4

There being no effective order increasing the production allowance for the jointly-owned well, the parties find themselves in the same situation as though the well had been over-produced and under such circumstances a division of the net proceeds from the sale of all the gas produced must be made pursuant to the terms of the contract.

There is no merit to the contention of Oklahoma Natural that the entry of orders by the Commission which periodically fixes allowables was a hearing sufficient to satisfy the objections of Texola. It is true that these orders were entered after notice in compliance with Paragraph 21 of Order 20536,5 but the purpose of these hearings was to determine the demand for gas for the ensuing period and to fix the allowables accordingly.

Judgment affirmed.