How to obtain good primary cement jobs
Journal Article
·
· World Oil; (USA)
OSTI ID:6728618
- Halliburton Services, Casper, WY (US)
- Schlumberger, Corpus Christi, TX (US)
A review of 23 primary cementing jobs performed over an 11-year period in four states has shown improved success with attention having been directed to low- cost means of improving displacement of drilling muds by cement slurries. The most important factors appear to be placement of centralizers and scratchers, conditioning of the drilling mud and pipe movement (reciprocation) while conditioning mud and while placing cement. Confidence gained in the use of these methods has resulted in a job technique wherein the top cementing plug is pumped down with 10% acetic acid or other desired perforating fluid followed by 2% KCI water. This technique permits lower-cost completions. The theory and application of cement bond logging is reviewed with five example CBL-VDL logs presented and discussed. Several examples are shown under applied surface pressure conditions. An example of a CBL-VDL log for an offset well where the principles of primary cementing were not observed is shown for comparison.
- OSTI ID:
- 6728618
- Journal Information:
- World Oil; (USA), Journal Name: World Oil; (USA) Vol. 210:4; ISSN 0043-8790; ISSN WOOIA
- Country of Publication:
- United States
- Language:
- English
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