Sakura merupakan pengembangan gas offshore di kawasan Selat Madura, Jawa Timur.
Karakter utama pengembangannya adalah membawa gas dari reservoir offshore menuju fasilitas produksi, kemudian melalui processing dan pipeline menuju sistem penerimaan gas di Jawa Timur.
Secara umum konfigurasi pengembangannya: GAS RESERVOIR ↓ DEVELOPMENT WELLS ↓ WELLHEAD / PRODUCTION SYSTEM ↓ FLOWLINE & GATHERING ↓ PRODUCTION FACILITY ↓ GAS PROCESSING ↓ COMPRESSION — IF REQUIRED ↓ METERING ↓ EXPORT PIPELINE ↓ RECEIVING FACILITY ↓ EAST JAVA GAS SYSTEM
POSISI PROYEK Sakura berada di kawasan Selat Madura yang telah memiliki aktivitas produksi migas serta infrastruktur gas offshore dan onshore. Hal tersebut memungkinkan konsep pengembangan mempertimbangkan integrasi dengan fasilitas regional yang telah tersedia.
Namun konfigurasi akhir tetap ditentukan berdasarkan: • Posisi reservoir • Recoverable gas • Production profile • Kedalaman air • Jarak terhadap fasilitas existing • Kapasitas fasilitas penerima • Komposisi gas • Tekanan reservoir • Pipeline requirement
GEOLOGI & RESERVOIR Reservoir menjadi dasar penentuan seluruh konfigurasi pengembangan.
Data yang digunakan dapat mencakup: • 2D / 3D seismic • Seismic interpretation • Well logs • Formation pressure • Fluid sampling • Core data • PVT analysis • Well testing • Reservoir modelling
Parameter reservoir yang dianalisis meliputi: POROSITY PERMEABILITY NET PAY GAS SATURATION RESERVOIR PRESSURE TEMPERATURE FLUID COMPOSITION RESERVOIR CONTINUITY
Data tersebut digunakan untuk menghitung recoverable resources dan production profile.
RESERVOIR MODELLING Data seismic dan sumur diintegrasikan ke dalam geological dan reservoir model.
Model digunakan untuk memperkirakan: • Gas Initially In Place • Recoverable gas • Well productivity • Number of development wells • Production plateau • Reservoir depletion • Recovery factor • Pressure decline
Hasil reservoir modelling kemudian menjadi dasar desain development wells dan surface facilities.
DEVELOPMENT WELLS Gas diproduksikan melalui development wells.
Jumlah sumur ditentukan berdasarkan ukuran reservoir, deliverability dan target production profile.
WELL COMPLETION Setelah development well mencapai reservoir, sumur dilengkapi dengan production completion.
Peralatan dapat terdiri atas: • Production tubing • Production packer • Downhole safety valve • Wellhead • Christmas tree • Pressure monitoring • Flow control • Completion accessories
Completion system menghubungkan reservoir dengan production facilities di permukaan.
PRODUCTION WELLHEAD SYSTEM Produksi dari sumur masuk ke wellhead facilities.
Sistemnya dapat mencakup: • Wellhead • Christmas tree • Choke • Production manifold • Flowline • Piping • Valves • Pressure control • Chemical injection • Metering
Apabila menggunakan subsea configuration, wellhead dan tree ditempatkan di seabed dan dihubungkan dengan flowline menuju fasilitas produksi.
SUBSEA PRODUCTION SYSTEM Untuk konfigurasi subsea, sistem dapat terdiri atas: • Subsea wellhead • Subsea tree • Subsea manifold • Subsea valves • Connectors • Subsea control module • Flowline • Umbilical • Monitoring system
Rangkaian produksinya: SUBSEA WELLS ↓ SUBSEA TREE ↓ SUBSEA MANIFOLD ↓ FLOWLINE ↓ PRODUCTION FACILITY
FLOWLINE Flowline membawa wellstream dari sumur menuju production facility. Fluida yang dibawa dapat berupa: GAS + CONDENSATE + PRODUCED WATER
Flowline system dapat mencakup: • Production pipeline • Valves • Connectors • Coating • Corrosion protection • Chemical injection • Pipeline monitoring
PRODUCTION PLATFORM Apabila development concept menggunakan offshore platform, fasilitas tersebut menjadi pusat penerimaan dan pengolahan produksi.
Platform dapat terdiri atas: • Wellhead facilities • Production manifold • Separation • Gas processing • Compression • Metering • Utilities • Electrical system • Instrumentation • Safety system
Konfigurasi topside ditentukan berdasarkan kebutuhan processing gas.
GAS SEPARATION Wellstream harus dipisahkan sebelum gas masuk ke proses berikutnya. Secara umum: WELLSTREAM ↓ INLET SEPARATOR ↓ GAS + CONDENSATE + PRODUCED WATER
Masing-masing kemudian masuk ke sistem pengolahan tersendiri.
GAS PROCESSING Gas harus memenuhi specification sebelum masuk ke export pipeline.
Processing facilities dapat mencakup: • Inlet separation • Gas treatment • Gas dehydration • Condensate separation • Produced water treatment • Chemical injection • Metering • Pressure control
Jenis treatment mengikuti komposisi aktual gas Sakura.
CONDENSATE HANDLING Apabila gas mengandung condensate, liquid hydrocarbon tersebut harus dipisahkan dan ditangani.
Sistem dapat mencakup: • Condensate separator • Stabilization • Storage • Transfer pump • Metering • Export interface
Volume dan konfigurasi condensate handling mengikuti karakter reservoir.
PRODUCED WATER Air yang ikut terproduksi harus dipisahkan dari hydrocarbon.
Produced water system dapat terdiri atas: • Separator • Hydrocyclone • Filtration • Pumps • Water quality monitoring • Disposal / treatment system
GAS COMPRESSION Compression diperlukan apabila tekanan gas tidak cukup untuk memasuki export pipeline atau receiving facility.
INTEGRASI DENGAN INFRASTRUKTUR JAWA TIMUR Pengembangan Sakura dapat mempertimbangkan koneksi dengan infrastruktur gas regional di Jawa Timur.
Secara konseptual terdapat dua konfigurasi utama. OPTION 1 — TIE-BACK / INTEGRATION
SAKURA WELLS ↓ FLOWLINE ↓ EXISTING PRODUCTION / PROCESSING FACILITY ↓ EXISTING EXPORT SYSTEM ↓ EAST JAVA GAS NETWORK
OPTION 2 — DEDICATED FACILITY
SAKURA WELLS ↓ NEW PRODUCTION FACILITY ↓ GAS PROCESSING ↓ COMPRESSION ↓ NEW EXPORT PIPELINE ↓ RECEIVING FACILITY ↓ EAST JAVA GAS NETWORK
GAS RECEIVING FACILITY Pada sisi darat, gas diterima melalui receiving facilities.
Sistem dapat terdiri atas: • Pipeline receiving station • Pig receiver • Gas filtration • Pressure regulation • Metering • Gas quality monitoring • Emergency shutdown • Control system
Setelah melalui receiving station, gas dapat diteruskan ke jaringan distribusi atau pengguna akhir.
ELECTRICAL & INSTRUMENTATION Fasilitas produksi membutuhkan sistem electrical dan instrumentation.
Scope meliputi: • Power generation • Electrical distribution • Transformer • Switchgear • MCC • Electrical cable • Instrumentation • Flow meter • Pressure transmitter • Temperature transmitter • Level transmitter • DCS / PLC • SIS • Emergency shutdown • Fire & gas system • Communication
MARINE & OFFSHORE INSTALLATION Pembangunan offshore facilities membutuhkan marine operation.
PROJECT DEVELOPMENT SEQUENCE RESERVOIR EVALUATION ↓ APPRAISAL ↓ RESERVOIR MODELLING ↓ PRODUCTION PROFILE ↓ CONCEPT SELECT ↓ PRE-FEED ↓ FEED ↓ DEVELOPMENT APPROVAL / FID ↓ DETAILED ENGINEERING ↓ PROCUREMENT ↓ DEVELOPMENT DRILLING ↓ FACILITY FABRICATION ↓ PIPELINE INSTALLATION ↓ OFFSHORE INSTALLATION ↓ HOOK-UP ↓ COMMISSIONING ↓ FIRST GAS ↓ PRODUCTION RAMP-UP
PROJECT PROFILE FIELD / PROSPECT: Sakura
AREA: Selat Madura — Jawa Timur
PROJECT CHARACTER: Offshore gas development
HYDROCARBON: Natural gas with potential associated condensate
MAIN DEVELOPMENT ELEMENTS: Development wells Wellhead / subsea production system Flowline Production facilities Gas processing Compression if required Export pipeline Receiving facilities
DEVELOPMENT CONFIGURATION: Dedicated offshore facilities or integration with regional infrastructure, subject to final reservoir and engineering results.
PROJECT UPDATE SUMMARY SAKURA OFFSHORE GAS DEVELOPMENT — SELAT MADURA
Rangkaian teknis pengembangan: GAS RESERVOIR → DEVELOPMENT WELLS → WELL COMPLETION → WELLHEAD / SUBSEA SYSTEM → FLOWLINE → PRODUCTION FACILITY → GAS SEPARATION & PROCESSING → COMPRESSION, IF REQUIRED → METERING → EXPORT PIPELINE → RECEIVING FACILITY → EAST JAVA GAS SYSTEM
Komponen utama proyek mencakup development drilling, completion, subsea/wellhead equipment, offshore production facilities, gas processing, compression, pipeline, electrical & instrumentation serta marine installation. Konfigurasi final Sakura ditentukan oleh reservoir model, production profile, lokasi lapangan dan hasil engineering terhadap opsi dedicated facilities maupun integrasi dengan infrastruktur gas Jawa Timur.
TENDER INDONESIA PROJECT UPDATE RESERVOIR • WELLS • OFFSHORE FACILITIES • PROCESSING • PIPELINE • GAS DELIVERY
