Putra, Febi Handika (2023) Analisa Penyebab Terjadinya Premature Failure Setelah Pekerjaan Thermal Stimulation Dilapangan X-y-x Pada Reservoir Heavy Oil. Other thesis, Universitas Islam Riau.

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Abstract

This field has 6183 production wells and has a reservoir containing heavy oil. Due to the high viscosity value of 118 cp and the low density of 22.4°API, the oil in this field is classified as heavy oil, making it difficult to produce conventionally. One of the methods used to increase oil recovery in heavy oil reservoirs today is Thermal Stimulation. The mechanism is to increase the temperature in the reservoir and reduce the viscosity value of heavy oil, so that oil in the reservoir can be produced to the surface. Meanwhile, the characteristics of the formation layers in the field are not compact (unconsolidated), which will cause the sand grains to collapse more easily. If sand has entered the primary sand control, it can cause a decrease in pump performance and the production process can also stop because the plunger is stuck. Based on conditions in the field where cases of pump failure were found less than 30 days after thermal stimulation work (premature failure), this research was carried out, by monitoring the history of thermal stimulation work and pump work. After that, data processing was carried out using Microsoft Excel. The aim was to group the data distribution, using the density based clustering method so that it was found that 411 wells experienced premature failure after thermal stimulation work. From this data, analysis and identification was carried out to find out the factors causing premature failure after thermal work. stimulation by identifying several variables including SSC where the number of SSCs that have not been installed is 379 wells and continued by identifying Special Pumps totaling 157 wells, followed by the type of completion where the majority of completions used are open hole totaling 357 wells and other factors that cause pump failure are the influence of layer formation. The majority of sand occurs in the (R, PK, P) layers, there are 359 wells. To overcome this problem, you can implement the recommendations written by researchers.

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