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Molensky Julisdayani - One of the best experts on this subject based on the ideXlab platform.
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pengaruh waktu produksi terhadap hasil perkiraan original oil in place menggunakan persamaan Material Balance studi kasus reservoir pb lapangan pblb
2017Co-Authors: Sumantri Yosaphat, Sunindyo Sunindyo, Indah Widiyaningsih, Molensky JulisdayaniAbstract:Bila data tekanan dan produksi cukup lengkap, selain menggunakan metode Volumetrik, harga Original Oil In Place (OOIP) dapat juga dihitung menggunakan metode Material Balance. Hasil metode Material Balance bisa berubah seiring berjalannya waktu. Sampai Desember 2011 Reservoir “PB” telah berproduksi selama 36 tahun. Pada awal produksi terdapat 4 sumur produksi dan menjadi 12 sumur pada puncak produksinya, tetapi pada Desember 2011 hanya berproduksi dari 3 sumur. Penelitian ini bertujuan menganalisa hubungan antara hasil perkiraan OOIP menggunakan metode Material Balance terhadap waktu produksi dan luas daerah reservoir yang terkuras. Perhitungan OOIP menggunakan persamaan Material Balance garis lurus Havlena-Odeh dilakukan pada 4 periode waktu produksi, yaitu akhir tahun ke-10, ke-20, ke-30 dan ke-36. Reservoir “PB” bertenaga dorong water drive, sehingga pada masing-masing periode perlu dicari model aquifer dan kombinasi harga konstanta A dan perbandingan radius aquifer terhadap radius reservoir (rD) yang tepat secara coba-coba. Berdasarkan harga A dan rD yang tepat kemudian ditentukan harga OOIP dan konstanta perembesan air (C). Perhitungan OOIP dengan menggunakan persamaan Material Balance garis lurus Havlena-Odeh pada keempat periode produksi menunjukkan bahwa harga OOIP metode Material Balance semakin mendekati harga OOIP hasil metode Volumetrik seiring dengan semakin luasnya daerah reservoir yang terkuras. Sedangkan, model aquifer yang sesuai untuk Reservoir “PB” adalah model Unsteady State van Everdingen-Hurst dengan finite aquifer. Kata kunci: OOIP, Material Balance, aquifer
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ANALISA PENGARUH WAKTU PRODUKSI TERHADAP PERKIRAAN ORIGINAL OIL IN PLACE MENGGUNAKAN PERSAMAAN Material Balance METODE HAVLENA ODEH PADA LAPISAN “X” LAPANGAN ”Y”
2012Co-Authors: Molensky JulisdayaniAbstract:Hasil perkiraan Original Oil in Place (OOIP) dapat berubah-ubah seiring berjalannya waktu produksi, sehingga perlu dilakukan perhitungan OOIP secara berkala agar diperoleh harga OOIP yang mendekati harga sebenarnya. Sebelum didapatkan data produksi yang lengkap, perkiraan besarnya OOIP dilakukan secara volumetrik dengan menggunakan data geologi, akan tetapi setelah data tekanan tersedia dan data produksi yang semakin lengkap, besarnya OOIP dapat dihitung ulang menggunakan persamaan Material Balance. Untuk Lapisan “X” yang bertenaga dorong water drive, data aquifer sangat minim dan tidak diketahui dengan pasti jumlah air yang masuk (water influx) ke dalam reservoar, maka model perembesan air dari aquifer ke dalam reservoar tidak bisa ditentukan dengan tepat. Oleh sebab itu, dilakukan pendekatan untuk mendeskripsikan aquifer Lapisan “X” dengan menggunakan teknik analisis regresi yang didasarkan pada persamaan Material Balance metode Havlena Odeh. Perhitungan OOIP dilakukan secara simultan dengan menentukan besarnya konstanta perembesan air (C), jari-jari tak berdimensi (rD) serta penentuan OOIP secara Material Balance. Model perembesan air yang dicoba pada metode ini adalah model steady state dari Schilthuis dan model aliran unsteady state dari Van Everdingen-Hurst. Pada skripsi ini, perhitungan OOIP dan parameter perembesan air dilakukan pada beberapa periode produksi yaitu : 10 tahun, 20 tahun, 30 tahun dan 41 tahun (Desember 2011). Selanjutnya, hasil perhitungan masing-masing periode dianalisa dan dibandingkan satu dengan yang lainnya. Selain itu, juga dilihat besarnya persentase perbedaan masing-masing periode terhadap OOIP volumetrik sebesar 17,866.79 MSTB. Hasil perhitungan OOIP dengan menggunakan persamaan Material Balance metode Havlena Odeh pada masing-masing periode memiliki prosentase perbedaan semakin kecil seiring berjalannya waktu produksi. Hal ini menunjukkan bahwa semakin lama reservoar berproduksi, semakin banyak jumlah data produksi, maka perkiraan harga OOIP akan semakin akurat. Model water influx yang sesuai untuk Lapisan ”X” adalah model Unsteady State dari van Everdingen-Hurst dengan finite aquifer. Hasil perhitungan harga jari-jari tak berdimensi (rD), konstanta waktu tak berdimensi (A), harga Original Oil in Place (OOIP) serta standar deviasi (%) pada masing-masing periode adalah sebagai berikut : Periode (Tahun) rD A OOIP (Mbal) (MSTB) % Perbedaan OOIP(MBal) terhadap OOIP (Volumetrik) 10 8 9 9,276 48.082 20 8 5 10,203 44.013 30 8 5 10,546 40.974 41 8 7 11,574 35.22
Said L. - One of the best experts on this subject based on the ideXlab platform.
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Penentuan Isi Awal Minyak Di Tempat Dengan Metode Volumetrik Dan Material Balance Garis Lurus Havlena-odeh Dan Perkiraan Produksi Zona Enh Pada Lapangan X
Trisakti University, 2016Co-Authors: Hartantyo E. N., Said L.Abstract:The purpose of this thesis is to calculate the original oil in place of ENH zone in X field. There are two methods to calculate the original oil in place of ENH zone, which is volumetric method and Material Balance method. From the calculation of original oil in place of ENH zone using volumetric method is 5.860.310 STB.In Havlena - Odeh straight line Material Balance method needs the number of water influx. The water influx can be determine using Van-Everdingen Hurst method. The constant number of water influx of ENH zone is 311 BBL/psia. The original oil in place calculation of ENH zone using Material Balance method is 6.000.000 STB. Decline curve analysis is a method to determine the production performance and estimate ultimate recovery (EUR). By knowing the economic limit rate of ENH zone at 40 BOPD, it can be searched the oil rate and cumulative oil production of ENH zone. The economic limit rate of ENH is reached in March 2019 with recovery factor at 57,95%
Lestari Said - One of the best experts on this subject based on the ideXlab platform.
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Penentuan Isi Awal Minyak Di Tempat Dengan Metode Volumetrik Dan Material Balance Garis Lurus Havlena-odeh Dan Perkiraan Produksi Zona Enh Pada Lapangan X
PETRO, 2018Co-Authors: Eoremila Ninetu Hartantyo, Lestari SaidAbstract:The purpose of this thesis is to calculate the original oil in place of ENH zone in X field. There are two methods to calculate the original oil in place of ENH zone, which is volumetric method and Material Balance method. From the calculation of original oil in place of ENH zone using volumetric method is 5.860.310 STB. In Havlena - Odeh straight line Material Balance method needs the number of water influx. The water influx can be determine using Van-Everdingen Hurst method. The constant number of water influx of ENH zone is 311 BBL/psia. The original oil in place calculation of ENH zone using Material Balance method is 6.000.000 STB. Decline curve analysis is a method to determine the production performance and estimate ultimate recovery (EUR). By knowing the economic limit rate of ENH zone at 40 BOPD, it can be searched the oil rate and cumulative oil production of ENH zone. The economic limit rate of ENH is reached in March 2019 with recovery factor at 57,95%. Keywords: original oil in place, volumetric, Material Balance, decline curve analysis
Mingqiang Wei - One of the best experts on this subject based on the ideXlab platform.
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blasingame decline type curves with Material Balance pseudo time modified for multi fractured horizontal wells in shale gas reservoirs
Journal of Natural Gas Science and Engineering, 2016Co-Authors: Mingqiang Wei, Yonggang Duan, Mingzhe Dong, Quantang FangAbstract:Abstract Production decline analysis has been considered as a robust method to obtain the flow parameters, reservoir properties and original gas in place. Although advanced Blasingame production decline analysis methods for vertical wells, fractured wells and horizontal wells in conventional reservoirs are widely used, there is no Blasingame production decline type curves for multi-fractured horizontal wells (MFHW) with considering stimulated reservoir volume (SRV) in shale gas reservoirs yet. Compared with conventional gas reservoirs, multi-flow mechanisms (such as Darcy flow, diffusion and adsorption/desorption) and complex flow behaviors of MFHW exist in shale gas reservoirs, bringing a big challenge for analyzing the rate decline performance of the wells. Thus, in this paper based on the Material Balance equation in consideration of adsorption/desorption, the Material Balance pseudo-time of Blasingame decline type curves is modified so as to extend the theory of Blasingame production decline analysis to shale gas reservoirs. Considering the nonlinearity caused by gas desorption and diffusion, and the complex flow of MFHW, a numerical method is applied in this paper to obtain Blasingame type curves. Based on the perpendicular bisection (PEBI) grids, a numerical model considered SRV is developed and the solution is obtained using control volume finite element method and the fully implicit method. Further Blasingame type curve is validated by a simplify model, and Blasingame production decline type curves of the MFHW considering SRV in a shale gas reservoir are plotted through computer programming. Five flow regimes, including early formation linear flow, early radial flow, compound linear flow, the second radial flow and pseudo-steady flow, are recognized. Compared with the modified Blasingame type curves presented in this paper, the ones with traditional pseudo-time have a tendency to underestimate the value of normalized rate, normalized cumulative production, normalized integral derivative cumulative production and the reserve. The effects of relevant parameters including SRV radius, outer region radius, permeability in SRV region and outer region, Langmuir pressure, Langmuir volume and diffusion coefficient on type curves are analyzed as well. This work expands our understanding of a MFHW flow behaviors in shale gas reservoirs, which can be used to estimate with reservoir properties, SRV, and reserves in these types of reservoirs.
Hartantyo E. N. - One of the best experts on this subject based on the ideXlab platform.
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Penentuan Isi Awal Minyak Di Tempat Dengan Metode Volumetrik Dan Material Balance Garis Lurus Havlena-odeh Dan Perkiraan Produksi Zona Enh Pada Lapangan X
Trisakti University, 2016Co-Authors: Hartantyo E. N., Said L.Abstract:The purpose of this thesis is to calculate the original oil in place of ENH zone in X field. There are two methods to calculate the original oil in place of ENH zone, which is volumetric method and Material Balance method. From the calculation of original oil in place of ENH zone using volumetric method is 5.860.310 STB.In Havlena - Odeh straight line Material Balance method needs the number of water influx. The water influx can be determine using Van-Everdingen Hurst method. The constant number of water influx of ENH zone is 311 BBL/psia. The original oil in place calculation of ENH zone using Material Balance method is 6.000.000 STB. Decline curve analysis is a method to determine the production performance and estimate ultimate recovery (EUR). By knowing the economic limit rate of ENH zone at 40 BOPD, it can be searched the oil rate and cumulative oil production of ENH zone. The economic limit rate of ENH is reached in March 2019 with recovery factor at 57,95%
