EVALUASI PROBLEM LOST CIRCULATION PADA PEMBORAN TRAYEK 8 ½” SUMUR “DHY-01” LAPANGAN “JM” PT PHR ZONA 1

FAUZAN R, DHIYAN (2023) EVALUASI PROBLEM LOST CIRCULATION PADA PEMBORAN TRAYEK 8 ½” SUMUR “DHY-01” LAPANGAN “JM” PT PHR ZONA 1. Other thesis, UPN "Veteran" Yogyajarta.

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Abstract

vi
RINGKASAN
EVALUASI PROBLEM LOST CIRCULATION PADA
PEMBORAN TRAYEK 8 ½” SUMUR “DHY-01”
LAPANGAN “JM” PT PHR ZONA 1
Oleh
Dhiyan Fauzan R
NIM: 113190139
(Program Studi Sarjana Teknik Perminyakan)
Sumur “DHY-01” merupakan sumur pengembangan yang terdapat pada Lapangan
“JM”. Pemboran sumur ini dilakukan pada cekungan semuatera tengah dengan
pemboran vertikal mencapai kedalaman 811,03 ftTVD. Pada pemboran Sumur
“DHY-01” didapati problem pemboran berupa lost circulation dengan tipe total
loss yang terjadi pada pemboran trayek 8 ½” kedalaman 339,02 ftTVD Lapisan
BK-500 Formasi Bekasap.
Pada analisa penyebab lost circulation, dilakukan melalui analisa faktor tekanan
dan analisa faktor formasi. Pada analisa faktor tekanan dilakukan perhitungan
tekanan formasi, tekanan hidrostatik, tekanan rekah formasi, bottom hole
circulating pressure (BHCP), equivalent circulating density (ECD), dan analisa
SBHP survey. Pada analisa faktor formasi dilakukan perhitungan faktor kompaksi,
faktor sementasi, analisa korelasi data sample cutting dan juga korelasi geologi
sumur sekitar pada Lapangan “JM”. Hasil analisis ini kemudian dilanjutkan untuk
mengevaluasi dan memberikan rekomendasi terkait metode penanggulangan
problem lost circulation.
Berdasarkan hasil analisa, dapat disimpulkan bahwa problem lost circulation pada
pemboran Sumur “DHY-01” Lapisan BK-500 dengan litologi dominasi sandstone
disebabkan oleh faktor formasi. Pada perhitungan faktor kompaksi menunjukan
hasil sebesar 0,54 x 1012 psi2 (tidak kompak), dan faktor sementasi sebesar 1,5
(very slightly cemented). Kondisi formasi yang tidak kompak dan tidak
terkonsolidasi dengan baik akan berimplikasi pada terbentuknya celah-celah batuan
yang menyebabkan kenaikan permeabilitas yang berujung pada peristiwa lost
circulation. Penanganan menggunakan LCM terbukti kurang efektif, sehingga
disarankan untuk mengaplikasikan metode blind drilling atau underbalance drilling
pada pemboran berikutnya.
Kata kunci: lost circulation, faktor kompaksi, faktor sementasi, high permeability,
blind drilling, underbalance drilling.
vii
ABSTRACT
EVALUASI PROBLEM LOST CIRCULATION PADA
PEMBORAN TRAYEK 8 ½” SUMUR “DHY-01”
LAPANGAN “JM” PT PHR ZONA 1
By
Dhiyan Fauzan R
NIM: 113190139
(Petroleum Engineering Undergraduated Program)
The "DHY-01" well is a development well located in the "JM" Field. The drilling
of this well was carried out in the Central Sumatera Basin with vertical drilling
reaching a depth of 811.03 ftTVD. During the drilling of the "DHY-01" well, a
drilling problem was found in the form of lost circulation with the type of total loss
that occurred during the drilling route 8 ½" with a depth of 339.02 ftTVD BK-500
layer of the Bekasap Formation.
In analyzing the causes of lost circulation, it is carried out through analysis of
pressure factors and analysis of formation factors. In the pressure factor analysis,
formation pressure, hydrostatic pressure, formation fracture pressure, bottom hole
circulating pressure (BHCP), equivalent circulating density (ECD) and SBHP
survey analysis are carried out. In the formation factor analysis, the calculation of
the compaction factor, cementation factor, correlation analysis of the sample
cutting data and also the geological correlation of the surrounding wells in the
“JM” Field were carried out. The results of this analysis are then continued to
evaluate and provide recommendations related to methods for mitigating lost
circulation.
Based on the results of the analysis, it can be concluded that the problem of lost
circulation in the drilling of the “DHY-01” Well BK-500 layer with sandstone-
dominated lithology is caused by formation factors. The compaction factor
calculation shows a result of 0.54 x 1012 psi2 (not compact), and a cementation
factor of 1.5 (very slightly cemented). Formation conditions that are not compact
and not consolidated properly will have implications for the formation of rock
crevices which cause an increase in permeability which leads to lost circulation
events. Treatment using LCM proved to be less effective, so it is recommended to
apply the blind drilling or underbalance drilling method in the next drilling.
Keywords: lost circulation, compaction factor, cementation factor, high
permeability, blind drilling, underbalance drilling.

Item Type:	Thesis (Other)
Subjects:	T Technology > T Technology (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Eko Yuli
Date Deposited:	03 Aug 2023 03:58
Last Modified:	03 Aug 2023 03:58
URI:	http://eprints.upnyk.ac.id/id/eprint/36742

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