Applied Geothermics for Petroleum Engineers by I. M. Kutasov

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By I. M. Kutasov

The aim of utilized Geothermics for Petroleum Engineers is to provide in a transparent and concise shape tools of using the information of temperature surveys in deep boreholes in addition to the result of box, laboratory and analytical investigations in geothermics to a large viewers. even supposing a few features of the topic of this ebook were mentioned in different past books and diverse papers, utilized Geothermics for Petroleum Engineers is the 1st ebook in this subject on hand to the petroleum engineering group. the target of the booklet is to provide the kingdom of information and prediction of downhole and formations temperatures in the course of good drilling, good crowning glory, shut-in and creation. utilized Geothermics for Petroleum Engineers is meant for drilling engineers (impact of increased temperatures on good drilling and finishing touch expertise, Arctic drilling), creation engineers (temperature regime of construction, injection and geothermal partitions, Arctic production), reservoir engineers (temperature box of reservoirs, thermal homes of formations and formation fluids), good logging engineers (interpretation of electric resistance, dust density, and temperature logs), and geophysicists and geologists (interpretation of geophysical info, calculation of the terrestrial warmth circulate, reconstruction of earlier climates).

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Initial conditions. Any instant can be taken as the origin of the time coordinate. 45) Let us assume a case of radial symmetry: an oil well after some period of production was shut-in for some time. To find the t e m p e r a t u r e distribution around the wellbore during shut-in, the end of production can be taken as the origin of the time coordinate. In this case the t e m p e r a t u r e f ( r , z) around the wellbore at the end of production should be given. We also can take as a starting instant the m o m e n t of time when the well was spudded.

At the same time a corresponding reduction of HFD will occur at some distances from the salt dome (Fig. 18). It is clear that the presence of a salt dome can only change the t e m p e r a t u r e field of formations but the value of Q will remain constant. , , m :[~ TEMP T ; P OF ..... E_ A N ~ N,EOF Fig. 18. Temperature-depth profiles near a salt dome (Guyod, 1946). due to anomalously high thermal conductivity of rock salt, on the temperature field of formations near salt domes were discussed in the literature (Guyod, 1946; Kappelmeyer and Haenel, 1974; Cheremenskiy, 1977; Gretener, 1981).

64) the minimum value of I, is when dr. 67) q For Prudhoe Bay, Alaska this simple model that illustrates the response of the permafrost to sudden change in the mean annum surface temperature is shown in Fig. 10. 5 m during the first 1800 years and is ignored in this graph. 68) where D is a constant, n can be any positive integer, and t is the time since the start of the warming; t - to represents the 34 CHAPTER 2 present day. Duchkov et al. (1997) used numerical modeling to predict the possible evolution of the temperature field of permafrost rocks until year 2100.

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