Many papers and books have been written relating the importance of cementing operations to the success of drilling and completions operations. While cementing costs typically represent less than 10% of total planned wells costs for domestic US onshore operations1 , the failure to get good zonal isolation and adequate cement bonding to the casing and formation can be catastrophic…from loss of potential pay zones to the loss of the entire well. Even operator personnel involved with cementing on a regular basis may take the operation for granted. "Cementing should be seamless." "It is not a commodity that I am as tied into as mud or casing."2  Often the success of the cementing operations is measured on location with a single drilling report entry…Bumped the plug and floats held. Good cement job. But was it really a good cement job? Does bumping the plug and pumping all the cement really reflect the efficiency and quality of the job? A recent two year cementing project in Wyoming provided both the operator and the service company an opportunity to develop metrics for evaluating cementing success that go beyond "bumping the plug". The purpose of this paper is to present the key performance indicators developed and demonstrate how to apply them to other cementing projects to quantify cementing success. For the seasoned engineer this paper provides a review of the importance of cementing operations while newer engineers may use it to become more familiar with the scope of planning and implementing successful cementing operations.

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