Circulating Temperatures Existing Prior To Cementing Casing In Prudhoe Bay Wells

Nelson, William

doi:10.2118/6802-ms

Cited by 3 publications

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Wellbore Temperature Field During Cementing Pumping

Zheng

Huang

Chen

et al. 2023

SPE Drilling &Amp; Completion

View full text Add to dashboard Cite

Summary To plan cementing operations in oil wells, predicting accurate circulating temperature is required. Failure to predict the circulating temperature can result in the wrong thickening time. To the best of our knowledge, correlation of the tables in API Recommended Practice 10B are usually chosen to predict bottomhole circulating temperature (BHCT), but both are not suitable in every block with a different geological condition. To design thickening time of the cement slurry, it is necessary to give a credible temperature profile of the wellbore during cementing pumping. Accordingly, a heat transfer numerical model has been developed to simulate conditions encountered down hole. To be accurate, the thermal conductivities and the specific heat of the mud, the spacer, and the cement slurry have been tested. The circulating temperature encountered by the cement slurry rises with the drop of the rate, the increase of the lateral section, the decrease of the slurry density, the decrease of the slurry thermal conductivity, and the decrease of the slurry-specific heat. The simulated data agree with the data obtained from the field case. The heat-up process of the cement slurry in simulation is different from that in the API thickening-time test. To analyze the impact of heat-up process on thickening time, two tests were designed. The results show that the heat-up process has a significant impact on the thickening time. Therefore, the method given by API has some limitations. The wellbore temperature field during cementing pumping was analyzed, and the real-time temperature of fluid was tracked, which supports the cementing design optimization and job safety, also improving bonding quality.

show abstract

Wellbore Temperature Field During Cementing Pumping

Zheng

Huang

Chen

et al. 2023

SPE Drilling &Amp; Completion

View full text Add to dashboard Cite

show abstract

A Thermal Transient Model of Circulating Wells: 1. Model Development

Marshall

Lie

1992

All Days

View full text Add to dashboard Cite

A model has been developed to calculate the transient (unsteady-state) and steady-state temperatures in the wellbore, completion and formation of a well during drilling, production and shut-in. A finite difference approach, simultaneously solving all the heat transfer equations, is written with a Microsoft Windows based user interface. Predictions of bottom hole and return temperatures from this model are shown to closely agree with the presently available field data. A further publication will: – provide detailed comparisons with results from more complete measured field data – investigate the sensitivity of wellbore temperatures to variables such as mud rheology, flow rate and rotary table power.

show abstract

A Cementing Temperature Simulator yo Improve Field Practice

1993

View full text Add to dashboard Cite

It has long been known that temperature during circulation and after cement placement is one ofthe most important parameters for the design of a slurry and the success of cement jobs. Since API co"elations do not take into account important parameters affecting the temperature evolution, simulators,which are sensitive to little known parameters, have been developed. This has made validation difficult or unconvincing, as there always exists a set of input parameters that can match observed temperature on a particular well. It has also significantly limited the widespread use of temperature simulators for field operations.In this paper we present a cementing temperature simulator which has been developed taking this inherent difficulty iilto account. The validation was performed by testing against 30 jobs from the API database, selected based on data completeness.With this simulator, temperature prediction has been considerably improved over the API method. The standard deviation, maximum overestimation and maximum underestimation have been reduced on the thirty API jobs.This model applies equally well to onshore and offshore,vertical and deviated wells, and takes into account other variables that affect temperatures while cementing.

show abstract

Circulating Temperatures Existing Prior To Cementing Casing In Prudhoe Bay Wells

Cited by 3 publications

References 0 publications

Wellbore Temperature Field During Cementing Pumping

Wellbore Temperature Field During Cementing Pumping

A Thermal Transient Model of Circulating Wells: 1. Model Development

A Cementing Temperature Simulator yo Improve Field Practice

Contact Info

Product

Resources

About