Transcript Document
Technology of Acoustic Influence for Production Optimization of Oil, Gas and Water Wells. Optimizing the effectiveness of oil, gas and water wells on different stages of their exploitation is one of the directions in water, oil and gas production, that show considerable promise. For that reason, active work in this field has always been conducted by research of scientific and engineering centres. The result of this work is rather big quantity of various methods that are now used in different corners of the world. DFM Technology The most progressive method - the acoustic one - has been used by us to create the DFM-technology i.e. technology of acoustic influence on the productive strata. The technology uses the ultrasound, which is irradiated by specially developed piezoceramics. The DFM-technology allows to increase production in several times (30-300 percent) for oil, gas and water wells. It is made through breaking up the clogged strata zones and the ones with poor permeability. The DFM is based on using the MF ultrasound pulses. It is covered by patents of Russia and Ukraine and is characterized by absolute ecological safety, high effectiveness and low power inputs. An important asset of the DFM-technology is that the extraction is stopped only for a short time exploitation of a developed well. Effect increases for a long time, depending on the geological and production characteristics of strata. WELL Downhole module Perforation Production string DFM Technology For more than 5 years, we has been using the DFM technology at various oil, gas and water fields both in Ukraine and abroad. Within this period, we have managed to achieve serious success in terms of development of the technique and equipment. COMPARISON OF TECHNOLOGIES DFM–ultrasound Chemical Condition of oil production while execution of well cleanup works stopped only for a short time stoppage of oil production, work of well Increase of oil production 30-300% 15-50% up to 50% Well cleanup works duration 2-3 days Up to 1 month 5-7 days Environmental safety safe harmful harmful Guarantee and effectiveness hIgh medium low Works safety level high medium low Manpower resources 2 persons 2-3 persons 3-4 persons Energy consumption low low high Influence upon the equipment, structure of layers does not influence causes the corrosion of the equipment advantages Hydraulic method stoppage of oil production, work of well causes crevice appearance in the equipment, deformation of layers Advantages: • Increased acoustic power; • Simplified service maintenance of the generator; • The generator is overvoltage and temperature resistant; • No vacuum in a zone of enhancement ; • Guaranteed increase of production resource of the radiator; • Smaller dimensions; • Lower electricity consumption. Technical Specification 1. ACOUSTIC RADIATOR diameter: 44 mm (1 3/4" = 1.75 ") length: up to 1.5 m (5 feet) weight: up to 10 kg (22 pounds) It is made of corrosion resistant material 2. ELECTRIC CABLE with three phases conductors lines 3. GENERATOR dimensions: 45х30х45 sm weight: <25 kg (55 pounds) Tatarstan Russia 5 4 3 before after 2 1 0 4546 40030 11924 6625 12243 6625 Poltavagazvidobuvanya Ukraina 70 60 50 40 30 20 10 0 112 223 46 before after Ukrgasvidobuvanya Ukraina 30000 25000 20000 15000 10000 5000 Oposhnya N 129 Chutovo N26 Rozumovka N422 Rozumovka N5 Solohivka N102 0 before m3.gas/day after m3.gas/day Ommdurman water well Khartoum State Water Corp. 6000 5000 befor g/h 4000 3000 2000 1000 Fetemab 41(a) Sawrah 40 Sawrah 18 Sawrah 0 after g/h Economic Effectiveness of Applying DFM -technology According to the recommendations on al-around effectiveness evaluation, economic effect from the carrying out the work pursuant to DFM technology is determined by showing the economic effect. Calculation of the effectiveness is based on index of a daily oil (gas) production before and after DFM -technology was used during a certain period of time. Calculation of Economic Effectiveness of Applying DFM at Oil Wells Assuming: Тd = 6 * 30 = 180 (days). Qo = 30 t/d. Qав = 50 t/d. P = 430 $/t. ( 68 $/bar. ) Then: We define additional production DQ = 20 t/d .( + 65% ) Cost Estimation Ce = 20*430*180*=1 580 000 $. The economic analysis is evidence of high profitability and payback of DFM -technology used on oil-wells. Required Preliminary Information on Wells • • • • • • • • • • • • • • Well depth; The level of static (the level of liquid in the well) and dynamic pressures; Wellbottom zone temperature; Perforation intervals; Tubing running depth; Tubing pipes diameter (is natural flow free); Project site information (name and date of the formation in the perforation zone); Well commissioning date and initial well production rate; History and dates of the bottom-hole formation treatment activities (acidizing, surfactant treatment, etc.); Dates of the latest well-logging measurements; Current well production rate (before ultrasound application); Presence of any oil-water contact in the perforation zone (if yes, its location is to be specified). Hydrocarbon-type composition of the oil. Note: more important factors from these specifications are: Density, gas factor, content of the water (per cent) Requirements to Wells Being Enhanced • Accessways are required to reach the platform for equipment installation (jacking log-processing station, portable log-processing laboratory and jacking lubricator installation). • Calibering is required before the start of the works in order to provide free access of geophysical equipment and ultrasonic transducer to the perforation zone. • Well treatment zone should not be blanked off by tubing string pipes. The treated wells may be the ones that are: • - currently exploited; • - under major overhaul. • The treatment zone is to contain liquid medium. The level of liquid in the treatment zone should exceed the treatment zone. Our technology allows to use the old well and maximally exploitation of their primary opportunities. This examples prove high and rapid economic effectiveness of applying DFM-technology on oil and gas wells, even in case of comparatively insignificant increase of production and minimal period of treatment. The DFM-technology has been successfully tested on gas condensate and oil fields of Ukraine and Russia. Considerable well and hydrocarbons production increase (from 30 up to 300 percent) has been achieved, which is supported by the certificates of intake capacity tests of KHARKOVGAZDOBYCHA, UKRNIIGAZ and TATNIPINEFT and many others. Out of an experimental method, the DFM has become an industrial highly effective and developed technology. For the present, our organization is the leader in the field of acoustic influence technologies in Ukraine.