Kerr-McGee anticipates large after-tax charges.

The company said it expects to take the special non-cash charges of about $265 million in the third quarter of 1986. Kerr-McGee Chairman Frank A. McPherson said the special charges will reduce stockholders’ equity in the energy company to $1.4 billion from $1.7 billion. “The special charges result primarily from the reassessment of company assets and operations in light of the decline in oil and gas prices,” he said.