production engineering 2 topic.
which includes the production logging tools, its application, categories of application and also some uses of the log with example in the practical life and physics.
Drill stem test (DST) is one of the most famous on-site well testing that is used to unveil critical reservoir and fluid properties such as reservoir pressure, average permeability, skin factor and well potential productivity index. It is relatively cheap on-site test that is done prior to well completion. Upon the DST results, usually, the decision of the well completion is taken.
Presentation defines well completion as a sub-discipline of drilling operations. It introduces the various components of the well completion process. It then describes and explains basic areas of the completion process including the bottom-hole completion process, the perforation process, the upper completion with packers, tubing component equipment and devices, tubing configurations, the horizontal completions and the Christmas tree(production head)
production engineering 2 topic.
which includes the production logging tools, its application, categories of application and also some uses of the log with example in the practical life and physics.
Drill stem test (DST) is one of the most famous on-site well testing that is used to unveil critical reservoir and fluid properties such as reservoir pressure, average permeability, skin factor and well potential productivity index. It is relatively cheap on-site test that is done prior to well completion. Upon the DST results, usually, the decision of the well completion is taken.
Presentation defines well completion as a sub-discipline of drilling operations. It introduces the various components of the well completion process. It then describes and explains basic areas of the completion process including the bottom-hole completion process, the perforation process, the upper completion with packers, tubing component equipment and devices, tubing configurations, the horizontal completions and the Christmas tree(production head)
Formation Evaluation project (drill stem test DST)Gehad Alyazidy
What is DST?
DST Advantages and Disadvantages.
Explain the operations of a DST based on a labelled diagram including its pressure vs time plot.
By referring to a case study reported in open literature, explain the challenges facing the O&G companies to obtain reliable test results.
The problem of water and gas coning has plagued the petroleum industry for decades. Water or gas encroachment in oil zone and thus simultaneous production of oil & water or oil & gas is a major technical, environmental and economic problems associated with oil and gas production. This can limit the productive life of the oil and gas wells and can cause severe problems including corrosion of tubulars, fine migration, hydrostatic loading etc. The environmental impact of handling, treating and disposing of the produced water can seriously affect the economics of the production. Commonly, the reservoirs have an aquifer beneath the zone of hydrocarbon. While producing from oil zone, there develops a low pressure zone as a result of which the water zone starts coning upwards and gas zone cones down towards the production perforation in oil zone and thus reducing the oil production. Pressure enhanced capillary transition zone enlargement around the wellbore is responsible for the concurrent production. This also results in the loss of water drive and gas drive to a certain extent.
Numerous technologies have been developed to control unwanted water and gas coning. In order to design an effective strategy to control the coning of oil or gas, it is important to understand the mechanism of coning of oil and gas in reservoirs by developing a model of it. Non-Darcy flow effect (NDFE), vertical permeability, aquifer size, density of well perforation, and flow behind casing increase water coning/inflow to wells in homogeneous gas reservoirs with bottom water are important factors to consider. There are several methods to slow down coning of water and/or gas such as producing at a certain critical rate, polymer injection, Downhole Water Sink (DWS) technology etc.
Shubham Saxena
B.Tech. petroleum Engineering
IIT (ISM) Dhanbad
This document was produced as part of my final year project of training to obtain a petroleum engineering diploma.
The aim of this project is to make a comparative study between continuous and intermittent gas lift systems based on real data from an oil well in Algeria, and to choose the system best suited to increase the production of the well.
This study was carried out by a manual design using the method of “fixed pressure drop” for the continuous gas lift system and “fallback gradient” method for intermittent gas lift system.
We were able to determine at the end of this study that the system best suited to the current conditions of our well would be the intermittent gas lift system and we also proposed that it should be combine with the "plunger lift " system in order to increase the efficiency of the intermittent gas lift system by eliminating problems linked to the phenomenon of" fallback " thus increase the production of our wells.
Formation Evaluation project (drill stem test DST)Gehad Alyazidy
What is DST?
DST Advantages and Disadvantages.
Explain the operations of a DST based on a labelled diagram including its pressure vs time plot.
By referring to a case study reported in open literature, explain the challenges facing the O&G companies to obtain reliable test results.
The problem of water and gas coning has plagued the petroleum industry for decades. Water or gas encroachment in oil zone and thus simultaneous production of oil & water or oil & gas is a major technical, environmental and economic problems associated with oil and gas production. This can limit the productive life of the oil and gas wells and can cause severe problems including corrosion of tubulars, fine migration, hydrostatic loading etc. The environmental impact of handling, treating and disposing of the produced water can seriously affect the economics of the production. Commonly, the reservoirs have an aquifer beneath the zone of hydrocarbon. While producing from oil zone, there develops a low pressure zone as a result of which the water zone starts coning upwards and gas zone cones down towards the production perforation in oil zone and thus reducing the oil production. Pressure enhanced capillary transition zone enlargement around the wellbore is responsible for the concurrent production. This also results in the loss of water drive and gas drive to a certain extent.
Numerous technologies have been developed to control unwanted water and gas coning. In order to design an effective strategy to control the coning of oil or gas, it is important to understand the mechanism of coning of oil and gas in reservoirs by developing a model of it. Non-Darcy flow effect (NDFE), vertical permeability, aquifer size, density of well perforation, and flow behind casing increase water coning/inflow to wells in homogeneous gas reservoirs with bottom water are important factors to consider. There are several methods to slow down coning of water and/or gas such as producing at a certain critical rate, polymer injection, Downhole Water Sink (DWS) technology etc.
Shubham Saxena
B.Tech. petroleum Engineering
IIT (ISM) Dhanbad
This document was produced as part of my final year project of training to obtain a petroleum engineering diploma.
The aim of this project is to make a comparative study between continuous and intermittent gas lift systems based on real data from an oil well in Algeria, and to choose the system best suited to increase the production of the well.
This study was carried out by a manual design using the method of “fixed pressure drop” for the continuous gas lift system and “fallback gradient” method for intermittent gas lift system.
We were able to determine at the end of this study that the system best suited to the current conditions of our well would be the intermittent gas lift system and we also proposed that it should be combine with the "plunger lift " system in order to increase the efficiency of the intermittent gas lift system by eliminating problems linked to the phenomenon of" fallback " thus increase the production of our wells.
overview of slim hole drilling, what is slim hole drilling, advantages of slim hole drilling, disadvantages of slim hole drilling, opportunities of slim hole drilling, safety of personnel in slim hole drilling
Well test analysis has been used for many years to assess well condition and obtain reservoir parameters. With the introduction of pressure-derivative analysis and the development of complex interpretation models that are able to account for detailed geological features, well test analysis has become a very powerful tool for reservoir characterization.
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Conference Content
- Training: Industry leading training, assessment and certification program updates designed to improve barrier management, monitoring and detection for improved well control competency
- Human Factors: Integrate latest expertise into your training programs to improve the interaction of individuals with facilities & equipment, management systems and people to enhance your HSEQ performance
- Risk Assessment: Develop a comprehensive risk assessment strategy covering barrier management and the operator / contractor interface to mitigate the risk of blow-out’s
- Well Control Planning: Share latest industry experience on hazard analysis, emergency response and oil spill planning to secure your organizations culture of preparedness
- Equipment & BOP Reliability: Improve equipment reliability by utilizing best practice experience for risk assessment, certification and maintenance initiatives to mitigate failures
PLUS:
- Blow-Out Response & Containment Workshop
Benefit from an exclusive well control blow-out response and containment workshop detailing a unique project case study and updates on capping stack technologies
- Exclusive Training Workshop: Take advantage of an exclusive session detailing latest industry enhancements to well control training, certification and examination
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A pumping test is a field experiment in which a well is pumped at a controlled rate and water-level response (drawdown) is measured in one or more surrounding observation wells and optionally in the pumped well (control well) itself; response data from pumping tests are used to estimate the hydraulic properties of aquifers, evaluate well performance and identify aquifer boundaries.
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developed using MATLAB. Governing equations based on
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3. INTRODUCTION
• The measurement and analysis of pressure data taken after a well is put on production,
either initially or following an extended shut-in period. Drawdown data are usually
noisy, meaning that the pressure moves up and down as fluid flows past the gauges and
minute variations in flow rate take place. This is especially true for new wells, in which
well cleanup commonly occurs for days after production has begun. Such data are
difficult to interpret, and the noise often obscures regions of interest to the analyst.
4. OBJECTIVE OF TEST
• The fundamental objective of drawdown testing is to obtain the average permeability of
the reservoir rock within the drainage area of the well and to assess the degree of damage
or stimulation induced in the vicinity of the wellbore through the drilling and completion
practices.
• Other objectives are to determine the pore volume and detect reservoir homogeneities
within the drainage area of the reservoir.
5. PROCEDURE
• The well is shut in for a period of time long enough to allow the pressure to equalize
throughout the reservoir.
• The pressure equipment is lowered into the well.
• The flow is begun at a constant rate and the bottom hole pressure is measured
continuously.
6. PROCEDURE IN MORE DETAIL
• Install the equipment on a well that has been shut-in and stable.
• "Stable" is defined as the shut-in well head pressure changing at a rate of less than 1 psi per hour.
• Check for leaks in the system after installation.
• The SPIDR system must be recording for at least 15 minutes prior to opening the well (check the box for
the SPIDR system wake-up time).
• Begin flowing the well on a single choke size. If the well must be "stepped-up", try to get the well up to
full rate within 30 minutes. Continue flowing on a constant choke size for the duration of the test.
• If shut-ins or flow interruptions occur during the course of the drawdown, try to get the well back on-line
as soon as possible on the same choke size.
7. CANDIDATES OF DRAWDOWN TEST
• The drawdown test is used in the exploratory wells (new reservoirs) or the wells that
have been shut in for buildup test and those wells whose loss of revenue due to
production in buildup test can’t be tolerated.
8. ADVANTAGES
• The main advantage of pressure drawdown is that there is no loss of cash flow due to
shut in of the well during the test period.
• It also determines the boundaries of the reservoir and skin of formation.
• Suitable in new wells. With no need to lose production, reservoir size can be determined.
9. DISADVANTAGES
• The main disadvantage of drawdown test is that difficulty to flow the well at constant
rate.
• It doesn’t determine the average reservoir pressure.
• The drawback to running a drawdown is that the rate may not be constant. However,
changing the choke periodically to maintain a constant rate will cause more problems
than letting the rate fluctuate. In order to get accurate analysis on a drawdown, it is
critical that no choke changes occur during the test.
In simple words
Ye aik aisa test hy jis me hm series of BHP measurements krty hn us period k doran k jb hamar production flow constant ho. ta k constant flow rate q pe measuring Pwf.
Aam tor pr well closed hota hy kuch time k liye ta ky pressure stabilize ho jaye . Or aik static pressure bn jaye .
A pressure drawdown test is simply a series of bottom-hole pressure measurements made during a period of flow at constant production rate.
Usually the well is closed prior to the flow test for a period of time sufficient to allow the pressure to stabilize throughout the formation, i.e., to reach static pressure.
SPIDR stands self powered intelligent data retriever