With increasing HT-10 injection pressure from 0.1 to 2.0 MPa, the D w value of artificial cores at 140℃ by the salt water increases from 82.6% to 100% and the H w value (water phase permeability recovery rate after plug removal by kerosene) decreases from 98.1% to 93.3%.
-? 91.4-93.8%. With increasing TR 5 injection pressure from 0.1 to 2.0 MPa, the D w value of artificial cores at 90℃ by the salt water increases from 74.4% to 100% and the H w value (water phase permeability recovery rate after plug removal by kerosene) decreases slightly from 96.1% to 91.3%.
Applications indicate that this system possesses good property of lubrication and sand-carrying ability, completion fluid density was controlled below 1. 18 g/cmj, temporary plugging ratio and plug removal ratio are 98. 84% and 94. 57% respectively.
Results can be considered as good concerning the recurrence rate (0.9%) but tolerance of the material remains questionable: 7 patients (6.3%) experienced long-lasting pain in the groin leading to plug removal in 2 cases.
After plug removal, the vertebral body's strength in flexion/compression loading was reduced significantly, but could be restored to at least intact values with any of the three filler materials.
The time of paraffin plug removal and the dependence of this time on the radiation frequency are found with the model suggested.
The tantalum implant has the highest E modulus, therefore less able to correct the stress riser created by plug removal.
The biomechmical implications of plug removal were assessed in single vertebra and ornent rnodeis.
Salt plugging position makes a slow descent until tunnel or fracture of formation with the decline of formation pressure,and then causes cricital plugging. This paper introduces the research and application achievements in Wendong Oilfield in recent years,which include screening and evaluation of chemical plug removal agent, chemical plugging technique, micropermeation desalination plug removal technique by continuous water feeding,gap bridge pump and chemical reagent flushing plug removal...
Salt plugging position makes a slow descent until tunnel or fracture of formation with the decline of formation pressure,and then causes cricital plugging. This paper introduces the research and application achievements in Wendong Oilfield in recent years,which include screening and evaluation of chemical plug removal agent, chemical plugging technique, micropermeation desalination plug removal technique by continuous water feeding,gap bridge pump and chemical reagent flushing plug removal technique.
Plug removal of oil well using high pressure water jet is a new developing technology in recent years. This paper introduces its theory,tool structure,laboratory testing and field application results of 23 oil wells. It is a kind of plug removal technique with high efficiency,economy and versatility and has no side-effect to oil formation. It is worth of popularizing.
The paper introduces the basic concepts about the sound wave oil producing technology. According to the sound wave property, the ultrasonic wave oil producing technology, the hydraulic shock plug removal technology,the LF vibration oil producing technology, the downhole LF electrical impulse oil producing technology and the high energy gas fracturing technology are introduced in this paper one by one. Meanwhile, the radius ranges of the treated reservoirs by using these technologies are compared to each...
The paper introduces the basic concepts about the sound wave oil producing technology. According to the sound wave property, the ultrasonic wave oil producing technology, the hydraulic shock plug removal technology,the LF vibration oil producing technology, the downhole LF electrical impulse oil producing technology and the high energy gas fracturing technology are introduced in this paper one by one. Meanwhile, the radius ranges of the treated reservoirs by using these technologies are compared to each other.Then, the paper analyzes the suitable condition of the several technologies. At last, the authors predicts the development prospects and research direction.
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