AZ ZAHRA, VINKA (2024) PENENTUAN KARAKTERISTIK RESERVOIR BERDASARKAN HASIL ANALISIS PRESSURE BUILD UP TEST PADA SUMUR “AA-01” LAPANGAN XTRA. Other thesis, UPN Veteran Yogyajarta.
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Abstract
vi
RINGKASAN
PENENTUAN KARAKTERISTIK RESERVOIR BERDASARKAN
HASIL ANALISIS PRESSURE BUILD UP TEST
PADA SUMUR “AA-01” LAPANGAN XTRA
Oleh
Vinka Az Zahra
NIM: 113190101
(Program Studi Sarjana Teknik Perminyakan)
Sumur "AA-01" Lapangan XTRA merupakan sumur yang akan dilakukan pengembangan
lanjutan. Untuk itu, dilakukan pengujian sumur menggunakan EMR agar diketahui
karakteristik reservoir dan produktivitas dari sumur AA-01. Berdasarkan pembacaan
EMR, dilakukan pengujian produksi dengan lama waktu produksi 8 jam dengan rate 2043
BPD dan waktu penutupan sumur selama 72 jam. Tujuan test ini dilakukan adalah untuk
menentukan parameter-parameter karakteristik reservoir, seperti Tekanan reservoir (P*),
skin (S), radius investigasi, flow efficiency (FE) serta penentuan model reservoir dan
model batas reservoir.
Metode yang digunakan pada studi ini menggunakan pressure build-up perhitungan
manual dan menggunakan simulator Ecrin v4.02. Pengujian ini dilakukan dengan cara
memproduksikan sumur dengan selang waktu tertentu dan laju alir konstan, kemudian
sumur ditutup untuk waktu tertentu. Ketika dilakukan penutupan sumur, tekanan alir
dasar sumur akan mengalami kenaikan kemudian akan dicatatat sebagai fungsi waktu.
Hasil pencatatan inilah yang digunakan untuk analisis menggunakan metode Horner. Dari
analisis metode Horner dengan kurva semilog yang menghasilkan parameter parameter
reservoir yang ingin dicapai. Dari kurva log-log diidentifikasi efek wellbore storage dan
flow regime.
Dari kedua analisis memperlihatkan adanya dua time region yaitu early time dan middle
time, dalam hal ini pengujian hanya sampai transient time. Terdapat efek wellbore storage
yang terlihat pada kurva pressure derivative yaitu changing wellbore storage, segregasi
fasa, movement gas-liquid interface. Pada middle time terdeteksi adanya radial flow yang
menyatakan periode transient time.Analisis simulator Ecrin v4.02 memberikan output
well model changing wellbore storage, horizontal well, model reservoir homogeneous
dengan infinite boundary. Dengan nilai parameter hasil pengolahan dengan simulator
berupa tekanan reservoir (P*) 2698,16 psia, nilai permeabilitas sebesar 1232,23 mD, skin
+ 71,83, radius investigasi sebesar 5470,31, nilai productivity index sebesar 148,59
BPD/psia, dan flow efficiency sebesar 0,13.
Kata kunci: Pressure Build-Up, Simulator Ecrin V4.02, Uji Sumur
vii
ABSTRACT
DETERMINATION OF RESERVOIR CHARACTERISTICS BASED
ON PRESSURE BUILD UP TEST ANALYSIS RESULTS
IN WELL "AA-01" XTRA FIELD
By
Vinka Az Zahra
NIM: 113190101
(Petroleum Engineering Undergraduated Program)
The XTRA Field "AA-01" well is a well that will be subject to further development. For
this reason, a well test using EMR was conducted to determine the reservoir
characteristics and productivity of the AA-01 well. Based on the EMR reading, a
production test was conducted with a production time of 8 hours with a rate of 2043 BPD
and a well closure time of 72 hours. The purpose of this test is to determine the parameters
of reservoir characteristics, such as reservoir pressure (P*), skin (S), investigation
radius, flow efficiency (FE) as well as determining the reservoir model and reservoir
boundary model.
The method used in this study is manual pressure build-up calculation and using Ecrin
v4.02 simulator. This test is conducted by producing the well with a certain time interval
and constant flow rate, then the well is closed for a certain time. When the well is closed,
the well bottom flow pressure will increase and then be recorded as a function of time.
The results of this recording are used for analysis using the Horner method. From the
analysis of Horner's method with semilog curves that produce reservoir parameters to be
achieved. From the log-log curve, the effects of wellbore storage and flow regime are
identified.
Both analyses show two time regions, namely early time and middle time, in this case
testing only until transient time. There is a wellbore storage effect seen in the pressure
derivative curve, namely changing wellbore storage, phase segregation, gas-liquid
interface movement. The analysis of Ecrin v4.02 simulator gives output well model of
changing wellbore storage, horizontal well, homogeneous reservoir model with infinite
boundary. With the parameter values of the processing results with the simulator in the
form of reservoir pressure (P*) 2698.16 psia, permeability value of 1232.23 mD, skin +
71.83, investigation radius of 5470.31, productivity index value of 148.59 BPD/psia, and
flow efficiency of 0.13.
Keywords: Pressure Build-Up, Ecrin V4.02 Simulator, Well Test
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Pressure Build-Up, Ecrin V4.02 Simulator, Well Test |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 24 Jan 2024 02:36 |
| Last Modified: | 24 Jan 2024 03:05 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/38751 |
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