Determination of Oil in Place by the Material Balance Method for Reservoirs with Partial Water Drive (No Gas Cap)

1985 ◽  
pp. 55-68
Author(s):  
Mihir K. Sinha ◽  
Larry R. Padgett
Keyword(s):  
Material Balance ◽  
Balance Method ◽  
Material Balance Method ◽  
Partial Water

scholarly journals PENENTUAN ISI AWAL MINYAK DITEMPAT DENGAN MENGGUNAKAN METODEMATERIAL BALANCE DAN VOLUMETRIK PADA RESERVOIR ADZ

2019 ◽  
Vol 3 (2) ◽  
pp. 87
Author(s):  
Dikky Fathurochman Sidiq ◽  
Lestari Said
Keyword(s):  
Material Balance ◽  
Volumetric Method ◽  
Balance Method ◽  
Bubble Point ◽  
Oil Reserves ◽  
Bubble Point Pressure ◽  
Point Pressure ◽  
Initial Content ◽  
Material Balance Method

<p>Determination of the initial oil content of a reservoir starts from exploration activities. In the initial stage, the determination of the initial oil reserves is determined. This aims to determine whether the project can be profitable for the company or not. Over time the determination of the initial contents of the oil continues to be carried out to improve the accuracy of calculations using the material balance method.<br />In the reservoir "ADZ" the type of reservoir is an undersaturated reservoir. This is because the initial pressure in 1980 was 2762.74 psia, while the bubble point pressure was 1625.8 psia. Until 2015 this reservoir was still above the bubble point pressure with a pressure of 1783.55 psia, this reservoir also had no gas cap in the initial conditions. The drive mechanism that works on this field is the solution for the gas drive.<br />Calculation of the initial content of oil in this final project uses 4 methods, namely volumetric method, material balance method, straight line, and Mbal software. Using the volumetric method, the initial oil reserves obtained at the place amounted to 174063462 STB, while the calculation of the initial oil reserves in place using the material balance method was 176497285 STB. The percentage difference in the initial content of oil between the methods is &lt;5%.</p>

scholarly journals Determination of pore compressibility and geological reserves using a new form of the flowing material balance method

2019 ◽  
Vol 172 ◽  
pp. 1025-1033
Author(s):  
Guofeng Han ◽  
Yuewu Liu ◽  
Liang Sun ◽  
Min Liu ◽  
Dapeng Gao ◽  
...  
Keyword(s):  
Material Balance ◽  
Balance Method ◽  
Pore Compressibility ◽  
Flowing Material ◽  
New Form ◽  
Material Balance Method

scholarly journals Special features of tight gas reserves determination

2020 ◽  
pp. 19-28
Author(s):  
S. V. Krivulya ◽  
S. V. Matkivskyi ◽  
Ye. S. Bikman ◽  
O. R. Kondrat ◽  
O. V. Burachok
Keyword(s):  
Material Balance ◽  
Development Planning ◽  
Balance Method ◽  
Pressure Curve ◽  
Reservoir Pressure ◽  
Tight Gas ◽  
Initial Development ◽  
Field Development ◽  
Material Balance Method

Special features of tight gas reserves determination, based on material balance method, were characterized, since reliability of initial hydrocarbons in place determination plays important role in future field development planning, particularly on recovery rate, wells to be drilled, capital expenditures, surface facilities etc. Using the synthetic 3D model of gas reservoir, different development scenarios were evaluated according to the different spatial distribution patterns of petrophysical properties within the reservoir. Analyzing the obtained results, the authors fully confirmed an assumption made, that significant heterogeneity of reservoir properties makes a great impact on the shape of pseudo reservoir pressure curve vs cumulative gas produced and introduces significant errors into determination of initial gas in place. At the late stages of the development, the slope of P/z straight line changes, and this allows determination of much greater reserves’ volumes. Usage of pseudo reservoir pressure vs cumulative produced gas for determination of drained reserves in tight gas formation is especially risky, because the production data can indicate the true volumes of gas in place, only after the majority of the gas been produced. In most cases, the development period to acquire necessary data for correct volumes in place estimation exceeds the planning period. This factor introduces the significant error into future field development during the planning phase. Due to that, at the initial development stages, the error in drained volumes estimation can account for 50% out of true initial volumes in place. Based on conducted research, the potential error evaluation for tight gas reservoirs initial gas in place determination with decline pressure material balance method was performed. According to the results of computer simulation, the error can account for 25% from true initial gas in place in simulation model. This error significantly excesses the acceptable limits and can lead to wrong decisions in development planning

scholarly journals Reducing Hydrocarbon in Place Uncertainty in Akasia Bagus Structure as Potential Field and Redevelopment Review

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
Tri Handoyo ◽  
Suryo Prakoso
Keyword(s):  
Development Strategy ◽  
Material Balance ◽  
Production Optimization ◽  
Balance Method ◽  
Water Influx ◽  
Natural Flow ◽  
Production Economic ◽  
Conventional Material ◽  
Original Oil In Place ◽  
Material Balance Method

<em>The success of the discovery of new structure Akasia Bagus with potential L layer in 2009 at PT Pertamina EP's Jatibarang Field was followed up by the drilling infill wells with Plan of Development (POD) mechanism which is currently in the process of drilling the last well. The basis of the L layer hydrocarbon calculation in place on the POD is a static analysis. The wells currently produced are still able to flow with natural flow and enough production data since 2009 this structure was found. This study will present an analysis of production in the L layer of Akasia Bagus structure for Original Oil In Place (OOIP) updates using the conventional material balance method and then carry out the best development strategy to optimize oil production. Economic analysis is also carried out for reference in making decision on which scenario to choose. The conventional material balance method gets an OOIP value of 17.36 MMSTB, with the drive energy ratio being 5:3:2 for water influx : fluid expansion : gas cap expansion. Three (3) production optimization scenarios were analyzed, the results showed that the addition of 2 infill wells reached Recovery Factot (RF) of oil up to 23% of OOIP, minimal water production and attractive economic results.</em>

scholarly journals Reserve evaluation of high pressure and ultra-high pressure reservoirs with power function material balance method

2019 ◽  
Vol 6 (5) ◽  
pp. 509-516 ◽  
Author(s):  
Hedong Sun ◽  
Hongyu Wang ◽  
Songbai Zhu ◽  
Haifeng Nie ◽  
Yang Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Power Function ◽  
Material Balance ◽  
Balance Method ◽  
Ultra High Pressure ◽  
Material Balance Method
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