"[
ABSTRAKReservoir modeling dan estamasi produksi dari proyek waterflooding di lapangan
Lengo telah dilakukan. Reservoir modeling merupakan langkah pertama dimana
di tahapan ini dihasilkan model reservoir geologi dari lapangan Lengo yang
kemudian akan dilakukan pembagiaan kelas-kelas reservoirnya berdasarkan data
porositas. Langkah kedua adalah aplikasi teori Buckley ? Leverett yang
digunakan untuk mengestimasi nilai gain produksi dan waktu yang dibutuhkan
dari breakthrough hingga sumur monitor memproduksi 100% air.
Berdasarkan reservoir modeling yang dikontrol oleh data core, lapisan L3/4 di
lapangan Lengo dapat dibagi menjadi 5 kelas (0-9.5% kelas 1; 9.5-17.04% kelas
2; 17.04-23.91% kelas 3; 23.91-28.53% kelas 4 dan 28.53-33.91 kelas 5). Pada
skema waterflooding telah dipilih 9 sumur kandidat injeksi dan 11 sumur produksi
dimana kerakteristik reservoir sumur-sumur injeksi tersebut masuk dalam kelas 3
dan 4.
Aplikasi teori Buckley ? Levertt menunjukkan bahwa kecepatan waktu
breakthrough sangat dipengaruhi oleh sifat permeabilitas relative minyak-air dan
Pore volume batuan (Porositas * Ketebalan). Dari perhitungan yang telah
dilakukan konfigurasi sumur injector ? produksi 3-3, 7-8 dan 9-9 diprediksi akan
menghasilkan penambahan produksi yang bagus.
ABSTRACTReservoir modelling and production estimastion of waterflooding project has been
conducted on Lengo filed. In this project reservoir modeling are the first steps to
creat the reservoir geology model of the Lengo field and then used to make
reservoir class depent on porosity data. The second steps are the Buckley ?
Levrett theory that used to estimate the gain production and time from
Breakthough until 100% water produce in monitoring well.
Based on the reservoir model wich control by core data, the L3/4 reservoir in
Lengo field can be devided into 5 class (0-9.5% as class 1; 9.5-17.04% as class 2;
17.04-23.91% as class 3; 23.91-28.53% as class 4 dan 28.53-33.91 as class 5).
For the waterflooding project we use 9 wells for injection well and 11 wells for
prodctuion/monitoring well where the reservoir charcteristic for all candidate
wells included in class 3 and 4.
Aplication of Buckley ? Leverett show that Breakthrourgh time very effected by
oil /water relative permeability and pore volume (Porosity * H) of the reservoir.
Based on the calculation configuration of injector-production wells of 3-3, 7-8 and
9-9 will be produce good gain i.e., 218.3MSTB, 196.8 MSTB and 437.1 MSTB, Reservoir modelling and production estimastion of waterflooding project has been
conducted on Lengo filed. In this project reservoir modeling are the first steps to
creat the reservoir geology model of the Lengo field and then used to make
reservoir class depent on porosity data. The second steps are the Buckley –
Levrett theory that used to estimate the gain production and time from
Breakthough until 100% water produce in monitoring well.
Based on the reservoir model wich control by core data, the L3/4 reservoir in
Lengo field can be devided into 5 class (0-9.5% as class 1; 9.5-17.04% as class 2;
17.04-23.91% as class 3; 23.91-28.53% as class 4 dan 28.53-33.91 as class 5).
For the waterflooding project we use 9 wells for injection well and 11 wells for
prodctuion/monitoring well where the reservoir charcteristic for all candidate
wells included in class 3 and 4.
Aplication of Buckley – Leverett show that Breakthrourgh time very effected by
oil /water relative permeability and pore volume (Porosity * H) of the reservoir.
Based on the calculation configuration of injector-production wells of 3-3, 7-8 and
9-9 will be produce good gain i.e., 218.3MSTB, 196.8 MSTB and 437.1 MSTB]"
