Field Studies of Circulating Temperatures Under Cementing Conditions

Abstract

Summary One of the most important but least well-known parameters in cementing operations is the circulating temperature. Many authors have presented theoretical analyses of the wellbore conditions, formulated mathematical models, and presented actual field measurements. However, very little temperature data have been reported for conditions of greatest concern (i.e., with casing in hole). To gather such data in detail, circulating temperature and pressure measurements were made with downhole tools lowered on wireline. In one case, temperature measurements were made during circulation immediately before cementing to record the circulating temperature in the well. In another case, measurements were made after the slurry was been placed to record the thermal recovery of the well. Data collected during these field trials (with casing in hole) are presented and demonstrate the different thermal response of a well with casing instead of drillpipe in the hole. Measured circulating temperatures are lower than those derived from the API schedules and highlight the necessity to account for well geometry properly when determining downhole temperatures. Introduction The oil industry has long recognized the importance of accurate and reliable determination of downhole circulating temperatures with respect to cementing operations. This is amply illustrated by the number of papers published on the subject. A number of analytical and numerical methods have been proposed to model the circulating well that often quote field data collected under drilling conditions. Various tools have been proposed for downhole flowing temperature measurement, and field data have been presented that show temperatures measured with drillpipe in the hole. However, very few papers have reported field data under the conditions that are most important (i.e., circulating temperatures with casing in hole). This paper presents the results of two field trials where fluid temperatures have been measured either at the casing shoe just before or immediately after the placement of a cement slurry.

Geothermal energy from abandoned oil and gas wells using water in combination with a closed wellbore

“…Oil and Gas industry preference however is to use direct measurements to gather data on downhole conditions rather than use exhaustive calculations where possible. [24] The development of accurate downhole tools and sensors, many tied to measurement while drilling systems, has enabled the industry to take measurements of downhole conditions in real time for many years.…”

A wellbore fluid performance parameters–temperature–pressure coupling prediction model during the managed pressure cementing injection stage

“…In addition, the prediction of wellbore temperature field is of great significance for the determination of fluid performance parameters and the calculation of wellbore pressure, and it is also an important basis for other related research. For the wellbore temperature field during drilling, a more mature prediction method has been formed due to a large number of theoretical research conducted by scholars and the application of temperature measurement devices such as measurement while drilling 21,22 . While during cementing injection, the acquisition of temperature field also relies on the prediction through mathematical modeling because temperature measurement devices cannot be installed 23 .…”

“…For the wellbore temperature field during drilling, a more mature prediction method has been formed due to a large number of theoretical research conducted by scholars and the application of temperature measurement devices such as measurement while drilling. 21,22 While during cementing injection, the acquisition of temperature field also relies on the prediction through mathematical modeling because temperature measurement devices cannot be installed. 23 Currently, the common method for predicting the temperature of the cement injection stage in the field is the API method proposed by the American Petroleum Institute.…”

Hydration kinetics of oil well cement in the temperature range between 5 and 30°C

“…Accurately measuring and modeling the evolution of cement hydration heat at low temperatures is of great significance for preventing gas hydrate decomposition. In recent years, many researchers have worked to develop algorithms that can accurately predict the temperature increase during cementing (Bittleston, 1990;Guillot et al, 1993;Davies et al, 1994). However, most studies only consider the heat exchange between the cement slurry and other media in the wellbore during the pumping process and ignore the key factor of cement hydration heat.…”