A decline curve analysis model based on fluid flow mechanisms. The conventional analysis of production decline curves for oil or gas production. Decline curve, initial rate, remaining reserve, software, scenario. Ihs energy powertools powertools economic and reserve evaluation software. Decline curve analysis software for oil and gas wells. Since the beginning of this century the shale oil production has increased from practically zero to currently supply almost half of the u. This will lead to a high water cut the ratio of water volume compared to the total liquid produced and is commonly observed in mature fields. To this end, a decline analysis model derived based on fluid flow mechanisms was proposed and used to analyze the oil production data from. Decline curve analysis is a technique routinely used to estimate hydrocarbon reserves under preestablished conditions. Spe 1246 analysis of production decline in waterflood. Petrovisual data analysis and visualization tool for oil and gas data. Compared with decline curve analysis dca, wdc models are expected to perform better in forecasting oil production in waterflooded oil fields. The traditional decline analysis can also be modified to a terminal limiting decline rate. In terms of waterdrive decline analysis, the logwater oil ratio vs cumulative oil production or np to predict oil recoveries for water oil ratios wor greater than 1 or watercut greater than 50% is commonplace.
The interpretation results of the numerical model, topaze software, and. As well, the recovery factor versus hydrocarbon pore volume injected, log water oil ratio wor versus cumulative oil produced n p, and wor versus cumulative water injected techniques are recommended to enhance resolution of decline. Wor wateroil ratio is a performancebased method of trending future water. A decline curve analysis dialog was included to allow the user to predict the economic limit for a specific lease, field, operator and county. In terms of waterdrive decline analysis, the log water oil ratio vs cumulative oil production or np to predict oil recoveries for water oil ratios wor greater than 1 or watercut greater than 50% is commonplace. Decline curve analysis dca is a graphical procedure used for analyzing declining production rates and forecasting future performance of oil and gas wells. With this worksheet, you can create multiple analyses on different data. Methods of decline curve analysis for shale gas reservoirs mdpi. Quick decline production oil and gas decline analysis and. Production forecasting decline curve analysis petrowiki.
Pdf analysis and interpretation of wateroil ratio in. Analytical decline curve analysis model for water drive gas. Hubbert curves predict that the production curves of nonrenewing resources approximate a bell curve. This includes down time related to facility and well maintenance. Yang 2009 proposed a productiondecline analysis tool for waterflood performance forecasting.
Oil depletion is the decline in oil production of a well, oil field, or geographic area. The hyperbolic curve requires estimation of both di and the exponent b. Typewell analysis improves decline curve estimation oil. Ihs declineplus is a software package that enables you to perform traditional decline. Nov 15, 2015 stepbystep instructions on using meraks peep software to correctly forecast oil by using peeps wateroilratio wor compositional forecasting capability. Field production profile based on drilling schedule and typical well profile. Methodology and cases for decline curve analysis sciencedirect. Oil and gas production rates decline as a function of time. Conventional decline techniques would include logq o versus t, q o versus q o, and logq o versus q o.
The software has its own python api application programming. Flowing bottom hole pressure fbhp, allowing for bubbly water in the annulus. Depletion and decline curve analysis in crude oil production. The hubbert peak theory makes predictions of production rates based on prior discovery rates and anticipated production rates.
Analysis of production decline in waterflood reservoirs. Decline curve analysis and its role in oil production forecast kraken. Still faster declines can occur, especially in fractured reservoirs, called harmonic decline. Quick decline is the ultimate production oil and gas decline analysis and economic evaluation tool for everyone. The major underlying assumptions for using arps equations are 1 constant. Pdf analysis of production decline in waterflood reservoirs. The decline curve shows how oil and gas production rates decrease over time. Decline curve analysis is a long established tool for developing future outlooks for oil production from an individual well or an entire oilfield. For the oil gas well with edgebottom aquifer, the decline analysis curve can be separated into four stages, which are listed as follows with the corresponding characteristics, as shown in figure 12.
Optimization of gaslifted oil wells opens in a new page. Types of decline analysis in production forecasting petrowiki. It is also possible where natural drive is supplemented by injection of water gas. This method is quite appealing because it is anchored in analytical solution of fractional flow and buckleyleverett. Decline curve analysis has been called the most commonly used and misused technique for forecasting future production and remaining reserves. Secondly, if the decline curve analysis is to be used for reserves calculations, the forecast needs reflect a reasonable certainty standard. Quickdecline was written by petroleum engineers as a tool to make quick and easy decisions. Some oil and gas wells decline at a faster rate, called hyperbolic or double exponential decline.
Decline curve analysis software to forecast oil and gas wells. Depletion has a fundamental role in the extraction of finite. Decline analysis is applicable, as a technique, when volumetric sweep is changing slowly and when relative permeability is controlling oil rates. Production decline curve analysis is the characterization. Decline curve analysis and application to eagle ford production data arps decline curve model. There is an overlap between the normalized rate curve and a certain type curve. Prediction of reservoir performance applying decline curve. Oil and gas decline curves rock river minerals, lp. Prediction of reservoir performance applying decline curve analysis. Decline curve analysis is probably the most widely used but at the same time mostly misunderstood methodology in petroleum engineering.
The case of eagle ford linnea lund production of oil and gas from shale is often described as a revolution to energy production in north america. In cases for a decline in rate of production, the data are extrapolated into the future to. The early demise of the bakken should serve as a warning. They utilize past production history of a petroleum reservoir to create a well production profile. Decline curves are generated from decline curve analysis dca software. A method for estimating reserves and predicting production in oil reservoirs and oil fields. Arps observed that the ratio of production rate to change in production rate played a crucial role in determining the type of decline a well would undergo. Simple tools for forecasting waterflood performance. Decline curve analysis consists of a simple and efficient technique. Decline curves generally show the amount of oil or gas produced per unit of time, for many successive periods. Water oil ratio forecasting is an empirical analysis method. Decline curve analysis is the most currently method used available and sufficient 1. Decline curve analysis models are frequently used but still have many limitations. P2 energy solutions decline curve analysis, economic analysis, gas material balance and reserve management.
Water displacement curve wdc models allow engineers to estimate reserves and forecast production performance in waterflooded oil reservoirs taking into account either liquid or water production. Approaches of decline curve analysis used for naturallyfractured reservoirs developed by water flooding have been few. Oil wells in this video i demonstrate how to perform decline curve analysis using ratetime decline for oil wells. Ratio interpretation in combination with rate interpretation traditional decline analysis can increase confidence in the forecasts.
Crains petrophysical handbook reserves from decline curve. Pdsview software package for viewing oilfield graphics data files. Analytical decline curve analysis model for water drive gas reservoirs mostafa s abdelkhalek 1, ahmed h elbanbi2 and mohamed h sayyouh3 1reservoir engineer, royal dutch shell, egypt 2cairo universityauc, egypt 3cairo university, egypt keywords. Optimization of gaslifted oil wells opens in a new page decline curve analysis software to forecast oil and gas wells. If your connection is slower, you will want to download the files separately. Using decline curves to forecast waterflooded reservoirs. Spe 1246 analysis of production decline in waterflood reservoirs. The most popular decline curve is that which represent the decline in the oil or gas. In order to properly use decline techniques to forecast oil rates, the waterflood decline correlation period should have the following criteria. Decline curve analysis is a means of predicting future oil well or gas well production based on past production history. Decline curve analysis is a graphical procedure used for analyzing declining.
Please direct your comments and questions to the author, dr. L337tech llc also offers paid training for quickdecline. Is a decline curve analysis applicable on individual wells. Production decline curve an overview sciencedirect topics. Petroleum engineers, landmen, royalty owners, prospectors, and everyone in between can easily use quick decline to get a leg up on the competition.
This program is provided by gotech as is and gotech does not fully support this program. Most oil wells and some gas wells produce with an exponential decline straight line on logarithmic plot. Typewell analysis improves decline curve estimation yearonyear stability in remaining proveddeveloped reserves 1p is the most positive impact of applying a consistent typewell approach to. Decline curve analysis and its role in oil production forecast. In exponential or harmonic rate decline, slope dependencies are often observed between the rate and ratio trends. If you have a fairly fast connection, you may wish to download the entire package. The product will save significant man hours over traditional decline curve analysis software. These regulations affect water management and disposal, as well as air quality. This analysis uses three methods for predicting the deline of a reservoir, exponential, harmonic and hyperbolic.
Stepbystep instructions on using meraks peep software to correctly forecast oil by using peeps water oil ratio wor compositional forecasting capability. The beginning of the end for the bakken shale play forbes. The production forecasting guidelines will address the following types of decline analysis. Effective decline rate d remains constant over time. Traditional decline generates a forecast of future production rates based on the equations defined by arps. The enhanced integration streamlines twoway data transfer between ofm software and the following. This course will give the learner a better understanding of how fundamental reservoir properties and drive mechanisms affect the shape of the production decline curve and how to avoid many of the mistakes commonly found in decline curve forecasts. Decline curve analysis software, especially for shale gas and coal seam gas. The cumulative oil production after the production decline upon decline time t can also be evaluated based on the total reservoir compressibility. Quick decline production oil and gas decline analysis. Analysis and interpretation of wateroil ratio in waterfloods article pdf available in spe journal 44. Dynamicforecaster has integrated decline curve analysis software to forecast oil and gas wells. Therefore we have developed a simple routine to permit low, mid and high trend decline analysis of logwor vs np relationships. Mar 01, 2017 new well performance has deteriorated, gas oil ratios have increased and water cuts are rising.
480 54 27 941 1228 608 1345 1520 644 1255 1420 1285 592 1270 827 108 276 679 1194 1407 387 1420 545 1335 742 264 1500 1507 599 1529 623 1116 1395 43 1160 557 1047 1370 618 1323 1012