Cement and Casing Failure Due to Extreme Temperatures and Corrosion


Heavy oil operators want low cost wells that will last for the 7-10 years it will take to realize ultimate recovery. Past experience in thermal projects has shown that steam, in addition to heating the heavy oil, can cause very high temperatures and corrosive conditions that may impose considerable thermal stress and chemical attack on casing and cement sheaths. Cement and casing failures and sand production problems lead to reduced well performance and the loss of many production and injection wells each year.

Another challenge posed by heavy oil reservoirs, which need to be relatively shallow, is that they are usually drilled in shallow formations which are prone to lost circulation.


Halliburton, the industry leader in cement technology, offers a variety of insulated and corrosion resistant cement systems that are tailored to endure high steam temperatures and low pH and still provide effective zonal isolation for longer than conventional cements. These better engineered thermal cementing programs can help improve casing and cement design, resulting in longer-lasting wells. Indeed, the life of the well is extended 5 to 10 years by the reduction in cement and casing failures. It is also critical that the chosen cement sealant for a heavy oil well is designed efficiently for both placement and optimized hydraulic modeling, and also for the life of the well.

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