CEMENTING EVALUATION ON ULTRA-DEEP WELL KU-1 IN TAHE OILFIELD

With the enhancement of exploration and development in Tahe Oilfield, more ultra - deep exploration wells of over 6000 m in depth are drilled in the lower Ordovician formation. To improve cementing quality and expand the exploration achievements, a most representative well KU - 1 is selected as an example for evaluation. The evaluation focuses on hole condition difficulties presentation before cementing each section of casing, operation process description, successes and failures of cementing operations, etc. Technical features and difficuhies in cementing operations of Tahe Oilfield are presented, and it is pointed out that the present technology level can meet the cementing requirements in ultra - deep wells, while there are still some aspects to be improved. Some suggestions and methods are also brought out and can be used as reference for the future operation.