Geokinetics Inc., a provider of seismic data, filed for chapter 11 protection yesterday, Bloomberg News reported. The company cited assets of $12 million and liabilities of $351 million in the court filing. Geokinetics, based in Houston, said in January that it reached an agreement with holders of more than 70 percent of secured notes, under which the noteholders would convert $300 million of debt to equity. Geokinetics missed a $14.6 million interest payment due Dec. 15 on the secured notes.