Steady-state and transient wellbore temperatures during drilling

by William Jesse McDonald

Publisher: Dept. of Energy, [Office of Energy Technology, Division of] Geothermal Energy, Publisher: for sale by the National Technical Information Service in [Washington], Springfield, Va

Written in English
Published: Downloads: 187
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Subjects:

  • Boring.,
  • Geothermal engineering.
  • Edition Notes

    Statementby William J. McDonald, Maurer Engineering, inc.
    ContributionsMaurer Engineering Inc., Terra Tek, Inc., United States. Dept. of Energy. Division of Geothermal Energy.
    The Physical Object
    Paginationv. :
    ID Numbers
    Open LibraryOL15230944M

Pseudo-steady state (PSS) flow occurs during the late time region when the outer boundaries of the reservoir are all no flow boundaries. Fluid Mechanics for Drilling - PetroWiki. Petrowiki February, in the fully transient form because temperature variation with time may be significant and because steady-state temperatures are. Managing wellbore temperatures may increase effective fracture gradients Drilling operations cause changes in wellbore temperatures that can significantly impact effective fracture gradients. Sep. @article{osti_, title = {Aspects of wellbore heat transfer during two-phase flow}, author = {Hasan, A.R. and Kabir, C.S.}, abstractNote = {Wellbore fluid temperature is governed by the rate of heat loss from the wellbore to the surrounding formation, which in turn is a function of depth and production/injection time. The authors present an approach to estimate wellbore fluid temperature. Significant change of wellbore and surrounding formation temperatures during the whole drilling process for oil and gas resources often leads by annulus fluid fluxes into formation and may pose a threat to operational security of drilling and completion process. Based on energy exchange mechanisms of wellbore and formation systems during circulation and shut-in stages under lost circulation Cited by:

flow characteristics during the drilling process of natural gas hydrate, and established the multi-phase flow equation of wellbore during the overflow. Wei. et al. [12, 13] studied the wellbore flow pattern of the drilling of gas hydrate reservoir, and established a wellbore flow model based on steadystate analysis. - Wei. et by: 2. As such, semi-steady state models are used for modeling wellbore flow dynamics. However, in the case that flow variations happen in a short period of time (i.e., a gas kick during drilling) the use of a transient two-phase model is crucial. It is usual for materials such as ___, ___, or ___ to enter the formation during drilling, completion or work over operations and reduce the permeability around the wellbore. reduce It is usual for materials such as mud filtrate, cement slurry, or clay particles to enter the formation during drilling, completion or work over operations and. models, in addition to proper handling of the PVT properties of the wellbore and annular fluids. To account for wellbore transient behavior during the Worst Case Discharge (WCD) blowout scenario, a transient multiphase flow model needs to be coupled with a robust transient .

@article{osti_, title = {User's manual for GEOTEMP, a computer code for predicting downhole wellbore and soil temperatures in geothermal wells. Appendix to Part I report}, author = {Wooley, G R}, abstractNote = {GEOTEMP is a computer code that calculates downhole temperatures in and surrounding a well. Temperatures are computed as a function of time in a flowing stream, in the wellbore. finite-difference transient wellbore simulator coupled with a semianalytic temperature model for computing wellbore-fluid-temperature profile in flowing and shut-in wells. The literature review on temperature models will be followed by wellbore models. Estimation of temperatures in a wellbore during injection or production is a. Abstract The average geothermal gradient in the subject deepwater field in Nigeria is °C/ m, nearly twice the gradient in most fields. As a result, the magnitude of the expected annular pressure build-up (APB) during steady state production is large enough to threaten well integrity. Therefore, an insulating packer fluid (IPF) was used in Annulus A to reduce heat transfer to the outer.   Early rate data can be very useful for transient analysis from clean-up periods. Such early analyses may offer reasonable formation properties, allow .

Steady-state and transient wellbore temperatures during drilling by William Jesse McDonald Download PDF EPUB FB2

The transient effect in the wellbore Steady-state and transient wellbore temperatures during drilling book temperature change 37 During the early stage of circulation and before the temperature 38 reaches a steady state condition, the transient change of the.

Steady-state and transient wellbore temperatures during drilling. [Washington]: Dept. of Energy [Office of Energy Technology, Division of] Geothermal Energy ; Springfield, Va.: For sale by the National Technical Information Service, It is shown that the rate of change in temperature at both locations is gradually decreasing with time.

After three hours of circulation time, the temperature at the bottom hole and the outlet surface became constants. Therefore, the wellbore reach the steady state condition after three hours circulation : Mostafa M. Abdelhafiz, Mostafa M.

Abdelhafiz, Luiz A. Hegele, Joachim F. Oppelt. Numerical transient and steady state analytical modeling of the wellbore temperature during drilling fluid circulation Author links open overlay panel Mostafa M. Abdelhafiz a b Luiz A. Hegele Jr a c Joachim F. Oppelt aAuthor: Mostafa M. Abdelhafiz, Mostafa M.

Abdelhafiz, Luiz A. Hegele, Joachim F. Oppelt. Modeling flowing wellbore fluid transient temperature is important in many petroleum engineering problems, including, pressure transient testing, flow assurance and wellbore integrity during production, preservation of drilling equipment integrity for geothermal wells and prediction of injection fluid temperatures.

These assumptions may be tested during a transient test. That is because unsteady-state wellbore heat transfer occurs even after the cessation of the wellbore fluid storage period.

Steady-state fluid flow ordinarily implies absence of wellbore effects from the viewpoint of transient by: 3. But, in wells that are deviated and have multiple temperature gradients like those found offshore in deep water basins, these methods are inadequate. This paper presents a finite difference model developed to predict the wellbore and formation transient temperature behavior during fluid circulation in the wellbore.

One of the critical factors in the deepwater exploration and development is the temperature during the drilling process.

Temperature in the wellbore will induce the wellbore instability, which means the bottom hole pressure will change according to the accumulated thermal effects on the density, viscosity of the fluid during the : Ming Feng, Catalin Teodoriu. Modeling Wellbore Transient Fluid-Temperature and -Pressure During Diagnostic Fracture Injection Testing in Unconventional Reservoirs.

The steady-state injection temperature. The steady-state results of the proposed thermal model are compared to the steady-state Hasan and Kabir model and commercial software.

In addition, the transient, time-dependent temperature behavior during mud circulation is compared against the results of the commercial : AmirHossein Fallah, Qifan Gu, Zheren Ma, Ali Karimi Vajargah, Dongmei Chen, Pradeepkumar Ashok, Eric.

Estimation of Wellbore and Formation Temperatures during the Drilling Process under Lost Circulation Conditions MouYang, 1 YingfengMeng, 1 GaoLi, 1 YongjieLi, 1 YingChen, 1 XiangyangZhao, 2 andHongtaoLi 1 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China.

Wellbore temperature is one of the key factors during the drilling process. In this paper, we establish a two-dimensional transient numerical model to predict the ultra-deep well bore temperature distributions during circulation and shut-in stages.

fluid temperature profile during both transient and pseudo-steady-state conditions. Marshal et al [7] created a model to estimate the transient and steady-state temperatures in a wellbore during drilling, production and shut-in using a finite difference approach for single-phase flow.

Song and Guan [8], by Author: Ali Falavand Jozaei, Ebrahim Hajidavalloo, Aziz Azimi, Younes Shekari. The results indicate that, during shallow formation drilling, the increase of drilling-fluid flow rate will cause the wellbore temperature to rise, but below the hydrate-dissociation temperature.

The primary reason for this discrepancy is that the previous models considered the heat transfer in the wellbore as a steady state and ignored friction heat. In the shallower and deeper sections of the well, the wellbore temperature changes rapidly with the depth, whereas in the middle section of well, the wellbore temperature increases linearly with increasing by: 7.

During deep-water oil and gas explorations, the dual gradient drilling (DGD) technology provides solutions to problems caused by the narrow density window and the shallow gas by controlling the pressure profile in the wellbore.

A transient temperature calculation model is established with consideration of the heat generated by the pump in the specific processes of the DGD by: 1. During the shut-in period in the wellbore are conducted transient downhole and bottomhole temperature is applicable only to steady-state conditions.

wellbore temperatures during drilling. SteadyState Continuous Flow System SteadyState CFS is part of an expanded range of Secure Drilling® services offered by Weatherford to minimize drilling hazards related to wellbore pressures, ultimately optimizing life-of-well performance. Combine CFS with other Secure Drilling technologies to further enhance drilling performance.

The. Abstract: Accurate prediction of wellbore temperature is essential to avoid potential drilling fluid/drillstring overheating and wellbore stability problems. A new model is proposed to predict the dynamic wellbore temperature during drilling. Besides the Author: John Michael Tesha, Ferney Moreno, James McLean Somerville, Saood Qaseem.

The constant undisturbed formation temperature profile controlling heat transfer into the wellbore appears counterintuitive in light of transient cooling of the formation that occurs upon fluid circulation in drilling and also heating during fluid by: 3. Numerical transient and steady state analytical modeling of the wellbore temperature during drilling fluid circulation.

Highlights•Modeling of the wellbore thermal activity during circulation is performed.•Two transient numerical models and a steady state analytical model are presented.•Three different convective heat tranfer coefficients have been used.•The location of the maximum.

Summary. This paper presents new analytical and semianalytical solutions derived from a coupled transient-wellbore/reservoir thermal model to investigate the information content of transient-temperature measurement made within the vertical wellbore across from the producing horizon or at a gauge depth above it during drawdown and buildup by: 1.

This paper aims to investigate the wellbore thermal behavior in multi-gradient drilling (MGD). Based on the principle of energy conservation, a synthetic transient heat transfer model was established, in which the mass and heat transfer of lightweight glass microspheres (GMSs) were considered for the wellbore fluid region, and the dynamic variation in the moving boundary was considered for the.

SPE Member Price USD Addressing both steady and unsteady-state fluid flow and related heat-transfer problems, the Second Edition of Fluid Flow and Heat Transfer in Wellbores strikes the perfect balance between theory and practice to aid new chapters on application of theory have been added and include probing pressure traverse in various wellbore multiphase fluid-flow 10/10(2).

invisible lost time during drilling operations by applying pre-operation and look-ahead well simulations. Our advanced dynamic modeling methods can accurately characterize wellbore conditions and capture the combined, complex dynamic effects that occur during transient conditions such as temperature evolution, pump start-ups, flow changes.

Transient Heat Transfer Models of Wellbore and Formation Systems during the Drilling Process under Well Kick Conditions in the Bottom-Hole. Applied Thermal Engineering – /ermalengCited by: 1. Numerical transient and steady state analytical modeling of the wellbore temperature during drilling December Journal of Petroleum Science and Engineering.

works Search for books with subject Boring. Search. Nuclear waste United States. Longer-than-seam-height drill development program G. Derby Not In Library. H.R. the Continental Scientific Drilling and Exploration Act Not In Library. Steady-state and transient wellbore temperatures during drilling William Jesse McDonald Not.

The temperature distribution of wellbore and surrounding formation has a significant influence on safe and fast drilling. This study aims to investigate the temperature distribution of horizontal wellbores during circulation by using transient temperature by: 7.

Fluid mechanics for drilling. PetroWiki. Jump to: This equation is given in the fully transient form because temperature variation with time may be significant and because steady-state temperatures are usually not achieved in typical wellbore hydraulic operations.

The viscous dissipation term Φ depends on the fluid friction model. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.What exactly is transient & how is it different from the steady-state vector calculator?

Transient phenomena are always presented during oil-well drilling, as an implicit result of changing the flow rate, pumping, and choke pressures while the fluid “mud” is circulating through the well. The process of circulation consists of 3 stages: (1. This paper is to combine various factors together to derive a solver for the transient temperature modeling during the dirculation of riserless drilling, which can be the basis to describe the near-wellbore well stability under geo-thermal stress and predict the annular pressure during HPHT injection or production, which can also be used to Author: Ming Feng, Catalin Teodoriu, Jerome Schubert.