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Search Petrowiki: Evaluation of acid treatments
...Evaluation of ...acid treatments Treatment ...evaluation leads to problem identification and to continuously improved ...
Treatment evaluation leads to problem identification and to continuously improved treatments. The prime source of information on which to build an evaluation are the acid treatment report and the pressure and rate data during injection and falloff. Proper execution, quality control, and record keeping are prerequisites to the task of accurate evaluation. Evaluation of unsatisfactory treatments is essential to recommending changes in chemicals and/or treating techniques and procedures that will provide the best treatment for acidizing wells in the future. The evaluation process encompasses six major areas on which to focus when assessing job performance and acid treatment success: * Injection rate and pressure.
- Information Technology > Knowledge Management (0.41)
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...n category "3.2.4 Acidizing" The following 13 pages are in this category, out of 13 total. A * Acid fracturing * ...Acid placement and coverage * ...Acid treatment design * Acidizing candidates * Acidizing horizontal wells * Acidizing preparations *...
- Well Completion > Acidizing (1.00)
- Well Drilling > Drilling Operations > Directional drilling (0.41)
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)
... the treatment. Contents * 1 Injection-rate control and monitoring * 2 Pressure behavior during acid injection * 3 On-site ...evaluation of ...acid treatment effectiveness * 4 Spent ...
You've decided that your well is a good candidate for acidizing, assessed the formation, designed the treatment, prepared the well and equipment, so now you're ready to conduct the treatment. This page describes both the process and things you should be doing during and immediately after the treatment. The main acid job should be circulated in place with HCl acid placed across the formation before the packer is set or before the bypass valve is closed. All perforations should be covered by acid before injection starts. Injection should start at a predetermined injection rate and the pressure observed to determine the condition of the wellbore.
- North America > United States > California (0.47)
- North America > United States > Louisiana (0.29)
- Well Completion > Acidizing (1.00)
- Health, Safety, Environment & Sustainability > Environment > Water use, produced water discharge and disposal (0.47)
- Well Completion > Completion Installation and Operations > Perforating (0.34)
- Reservoir Description and Dynamics > Formation Evaluation & Management > Drillstem/well testing (0.30)
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...1.2 Separation and treating" The following 33 pages are in this category, out of 33 total. A * Acid placement and coverage * ...Acid treatment design C * CHOPS sand management * Circulatability treatment in cementing * Controll...e management E * PEH:Emulsion Treating * Enriched hydrocarbon miscible flooding case studies * Evaluation of ...
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...n technique employing coiled tubing. They also provide a design strategy for calculating volumes of acid required and the rate of coiled-tubing withdrawal during ...acid placement. A method of optimization for completion and stimulation of horizontal wells is also pres...ented. Other papers have further advanced the planning, design, diversion, execution, and evaluation of acidizing horizontal wells employing similar methods to those used in vertical wells.[2][3] Con...
Horizontal wells are special cases, which have been covered by Frick and Economides.[1] They emphasize how damage control and removal is just as important in horizontal wells as in vertical completions. Moderate damage can reduce horizontal well productivity to that below the productivity of an undamaged vertical well. The authors provide a stimulation technique employing coiled tubing. They also provide a design strategy for calculating volumes of acid required and the rate of coiled-tubing withdrawal during acid placement.
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- North America > United States > Texas > Permian Basin > Yates Formation (0.99)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.99)
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- Well Drilling > Drilling Operations > Directional drilling (1.00)
- Well Completion > Acidizing (1.00)
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... The following 200 pages are in this category, out of 413 total. (previous page) (next page) A * Acid additives * ...Acid fracturing * ...Acid placement and coverage * ...
- Europe > United Kingdom > North Sea > Central North Sea > Fisher Bank Basin > Block 22/5b > Hawkins Field (0.99)
- Europe > Norway > North Sea > Central North Sea > Central Graben > PL 018 > Block 2/4 > Greater Ekofisk Field > Ekofisk Field > Tor Formation (0.99)
- Europe > Norway > North Sea > Central North Sea > Central Graben > PL 018 > Block 2/4 > Greater Ekofisk Field > Ekofisk Field > Ekofisk Formation (0.99)
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...ation damage is the cause for poor production, the well is a good candidate for acidizing.Formation evaluation for acidizing provides more information about assessing the nature of the formation damage. Evalua...at show change of rate with time and that note significant events such as workovers and stimulation treatments. Damage is revealed by at least three different characteristics as previously listed. The first is ...e reduced productivity immediately after the workover. This lowered productivity persisted until an acid treatment removed the damage. Many times the analysis of a damaged condition is not so obvious. * ...
If the problem is formation damage, then matrix acidizing may be an appropriate treatment to restore production. This page discusses ways to evaluate whether a well is a good candidate for acidizing. A good matrix acidizing candidate is any well producing from: * Formation with permeability greater than 10 md * Permeability of which in the near-wellbore or near-perforation region has been reduced by solid plugging. This plugging can be either mechanical or chemical. Mechanical plugging is caused by either introduction of suspended solids in a completion or workover fluid, or dispersion of in-situ fines by incompatible fluids and/or high interstitial velocities.
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- Europe > Norway > Norwegian Sea (0.25)
- Well Completion > Acidizing (1.00)
- Reservoir Description and Dynamics > Formation Evaluation & Management > Drillstem/well testing (1.00)
- Well Completion > Completion Installation and Operations > Perforating (0.93)
- Reservoir Description and Dynamics > Reservoir Fluid Dynamics > Flow in porous media (0.93)
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...i (Redirected from Acidizing) Matrix acidizing refers to one of two stimulation processes in which acid is injected into the well penetrating the rock pores at pressures below fracture pressure. Acidizin...the flow of hydrocarbons. Effective acidizing is guided by practical limits in volumes and types of acid and procedures so as to achieve an optimum removal of theformation damage around the wellbore. Con...tents * 1 Two basic acidizing treatments * 2 Acidizing to remove damage * 3 Acidizing to enhance productivity * 3.1 Wormholes * 3.2 Impr...
Matrix acidizing refers to one of two stimulation processes in which acid is injected into the well penetrating the rock pores at pressures below fracture pressure. Acidizing is used to either stimulate a well to improve flow or to remove damage. During matrix acidizing the acids dissolve the sediments and mud solids within the pores that are inhibiting the permeability of the rock. This process enlarges the natural pores of the reservoir which stimulates the flow of hydrocarbons. Effective acidizing is guided by practical limits in volumes and types of acid and procedures so as to achieve an optimum removal of theformation damage around the wellbore.
- Information Technology > Knowledge Management (0.41)
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...Matrix acidizing Matrix acidizing refers to one of two stimulation processes in which acid is injected into the well penetrating the rock pores at pressures below fracture pressure. Acidizin...the flow of hydrocarbons. Effective acidizing is guided by practical limits in volumes and types of acid and procedures so as to achieve an optimum removal of theformation damage around the wellbore. Con...tents * 1 Two basic acidizing treatments * 2 Acidizing to remove damage * 3 Acidizing to enhance productivity * 3.1 Wormholes * 3.2 Impr...
Matrix acidizing refers to one of two stimulation processes in which acid is injected into the well penetrating the rock pores at pressures below fracture pressure. Acidizing is used to either stimulate a well to improve flow or to remove damage. During matrix acidizing the acids dissolve the sediments and mud solids within the pores that are inhibiting the permeability of the rock. This process enlarges the natural pores of the reservoir which stimulates the flow of hydrocarbons. Effective acidizing is guided by practical limits in volumes and types of acid and procedures so as to achieve an optimum removal of theformation damage around the wellbore.
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...ants that could flow into the well or formation. Proper preparation is a key factor in a successful acid treatment. Contents * 1 Well preparation * 2 Borehole cleanout * 3 ...Acid cleaning tubing * 4 References * 5 Noteworthy papers in OnePetro * 6 External links * 7 See als...s. Each of these components through which the fluid travels must be properly cleaned before pumping acid into the formation. Surface tanks must be cleaned before being filled with ...
The success of an acidizing operation can be compromised if the wellbore, tanks, or other equipment contain solids or other contaminants that could flow into the well or formation. Proper preparation is a key factor in a successful acid treatment. Treating fluids must leave surface tanks, travel through surface pipe and well tubing, enter a wellbore, and pass through the perforations into the formation so that the solvent can react with the damaging solids. Each of these components through which the fluid travels must be properly cleaned before pumping acid into the formation. Surface tanks must be cleaned before being filled with acid.
- North America > Canada (0.49)
- North America > United States > California > San Francisco County > San Francisco (0.15)
- Well Completion > Acidizing (1.00)
- Well Completion > Completion Installation and Operations > Perforating (0.38)
- Information Technology > Knowledge Management (0.41)
- Information Technology > Communications > Collaboration (0.41)