M-13.1, r. 1 - Regulation respecting petroleum, natural gas and underground reservoirs

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40. A well drilling licensee shall have wireline logs taken during drilling operations. The logs must make possible evaluation of the well below the surface casing.
Where the well is less than 150 m in depth, the logs must be of the gamma and resistivity types.
Where the well is more than 150 m in depth, the logs must be of the sonic, gamma, porosity and resistivity types.
O.C. 1539-88, s. 40.