Combination of Radial Drilling Technology with Acid Jetting: New Approach in Carbonate Reservoir Stimulation

2020 ◽  
Author(s):  
Ayrat Bashirov ◽  
Ilya Lyagov ◽  
Ilya Galas
Keyword(s):  
Carbonate Reservoir ◽  
New Approach ◽  
Reservoir Stimulation ◽  
Drilling Technology ◽  
Radial Drilling

Reservoir Stimulation Technique Combines Radial Drilling Technology With Acid Jetting

2021 ◽  
Vol 73 (06) ◽  
pp. 53-54
Author(s):  
Chris Carpenter
Keyword(s):  
Carbonate Reservoir ◽  
Technical System ◽  
Abu Dhabi ◽  
Modular Construction ◽  
Flexible Pipe ◽  
Reservoir Properties ◽  
Reservoir Stimulation ◽  
Carbonate Formation ◽  
Drilling Technology ◽  
Radial Drilling

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 202661, “Combination of Radial Drilling Technology With Acid Jetting: New Approach in Carbonate Reservoir Stimulation,” by Ayrat Bashirov, Ilya Lyagov, and Ilya Galas, Perfobur, prepared for the 2020 Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, held virtually 9–12 November. The paper has not been peer reviewed. The complete paper describes an approach to stimulate carbonate formations with bedding water or a gas cap. The technique is a combination of acid jetting and a radial drilling technology that uses mechanical radial drilling with a slim mud motor. The primary advantages of the technology include controlled trajectory and the possibility of re-entry into channels. The novelty of the technology is in its ability to deploy acids in the rock far away from the wellbore through the mechanically drilled holes with known depths and azimuths. Reservoir Description The mature field is in central Russia in the Republic of Bashkortostan. The field contains both sandstone and carbonate reservoirs. Oil depth is from 780 to 1830 m. Six reservoirs are in development. This study concentrates on projects in a carbonate formation that is a substage of the early Pennsylvanian Period. This formation is highly heterogeneous with closely underlying water. Permeability of the reservoir is approximately 43 md; reservoir pressure is 1,000 psi, and oil density is 0.891 g/cm3. Two adjacent well candidates with identical reservoir properties were selected for the study, with a distance between wells of approximately 136 m. Net oil thickness in Well A is 4.4 m and 3 m in Well B. Mechanical Radial Drilling Technology The technology described by the authors uses mechanical radial drilling with a slim mud motor. The technology allows the drilling of a network of radial channels up to 15 m long with up to four channels of different trajectories on one level. The technical system features a modular construction for ease of assembly at the wellhead area and increased operational efficiency. The main elements of the technical system include the following: - Pipe pusher connected at the top with an overflow valve module and, at the bottom, with a guiding device connected by means of a hydraulic pusher - Flexible pipe assembly with a small (nonstandard) sectional mud motor - Drilling bit (milling cutter for window cutting) - Special whipstock and an anchor module with an orienting funnel connected from below to the pipe frame

scholarly journals Controlled deep perforation by radial drilling of channels with the "Perfobur" technical system to intensify the reservoir inflow

2021 ◽  
Vol 3 (2) ◽  
pp. 99-110
Author(s):  
A. I. Bashirov ◽  
I. R. Galas ◽  
I. A. Лягов ◽  
M. F. Nazyrov
Keyword(s):  
High Efficiency ◽  
Carbonate Reservoir ◽  
Technical System ◽  
Reservoir Properties ◽  
Close Proximity ◽  
Oil Flow ◽  
Drilling Technology ◽  
Water Cut ◽  
Radial Drilling ◽  
Actual Trajectory

The paper presents a technology for controlled deep penetrating perforation using the Perfobur technical system to intensify inflow by drilling radial channels 69 mm in diameter, up to 25 metres in length. This technology was first applied to a carbonate reservoir in the Bashkirian tier, characterised by high heterogeneity and close proximity of bedrock water. An adjacent well, close to the acid fracture well, with identical reservoir properties, was selected. Well "A" was acid fractured and well "B" was drilled using Perfobur technology with two directional channels, each 14 metres in length. In well "B", after drilling the channels, hydrochloric acid solution was injected through a special hydromonitor nozzle at two points. A total of 48 m3 of acid was injected into the "B" well. Comparing the results of well "B" with the well where the hydrofracturing was performed allow speaking about high efficiency of the controlled radial drilling technology. The ability to predict the channel trajectory, knowledge of its actual trajectory in combination with acid treatment of the reservoir using hydromonitor nozzle at a considerable distance from the reservoir allows achieving a significant increase in oil flow rate with lower water cut of the produced oil.

Assessment of Radial Drilling Feasibility at the Fields of the Orenburg Region

2018 ◽  
Vol 785 ◽  
pp. 125-132
Author(s):  
Vadim Aleksandrov ◽  
Marsel Kadyrov ◽  
Andrey Ponomarev ◽  
Vadim Golozubenko ◽  
Vladimir Kopyrin
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Carbonate Reservoir ◽  
Field Analysis ◽  
Gas Industry ◽  
Orenburg Region ◽  
Oil And Gas Producers ◽  
Drilling Technology ◽  
Radial Drilling ◽  
Almost All

The development and use of the radial drilling technology has been a controversial issue in the oil and gas industry for a long time. Nowadays, almost all big oil and gas producers deal with the question of its practical use at particular fields. The results of works carried out at carbonate reservoir units of the Orenburg Region were analyzed in the article. The ways to improve the existing technology of radial drilling were also offered. The research objective is to evaluate the technological efficiency of radial drilling application at the fields of the Volga-Ural oil and gas region with carbonate reservoir units. The results of radial drilling were characterized with the help of the detailed geological and field analysis and their quantitative evaluation was given.

Improving Water Injectivity Through Lateral Radial Drilling into the Reservoir

2021 ◽  
Author(s):  
Effiong Essien ◽  
Uchenna Onyejiaka ◽  
Stanley Onwukwe ◽  
Nnaemeka Uwaezuoke
Keyword(s):  
Oil Recovery ◽  
Damage Zone ◽  
Water Injection ◽  
Progressive Increase ◽  
Recovery Factor ◽  
Water Flooding ◽  
Increase With Increase ◽  
Drilling Technology ◽  
Water Cut ◽  
Radial Drilling

Abstract Poor formation permeability and near well bore damage may limit water injectivity into the reservoir in a water injection project. This paper seeks to evaluate the effect of radial drilling technique on water injectivity and oil recovery in water flooding operation. Radial drilling technology utilizes hydraulic energy to create lateral perpendicular small holes through the casing into the reservoir. The holes may extend to 100 m (330 ft) into the reservoir to access fresh formations beyond the near wellbore, and damage zone. A black oil simulator (Eclipse 100) was used to modeling a lateral radial drill from the borehole into the reservoir, and that of a conventional perforation of the wellbore respectively. A simulation study was carried out using various presumed radial drill configurations in determining injectivity index, displacement efficiencies, recovery factor and water cut of the process. The determined results were further compared with that of the conventional perforation process case respectively. The results show a significant improvement in water injectivity in radial drill case with the increasing length and number of radials as compared to the conventional wellbore perforation case. The determined Recovery factor shows a progressive increase with increase in the numbers of radials drilled, irrespective of the radial length. However, it was observed that, the more the number and length of the radials drilled in to the reservoir, the higher the water cut from producer wells. Radial Drilling Technology, therefore, has a promising potential to improving water injectivity into the reservoir and thereby optimizing oil recovery in a water flooding operation.

scholarly journals An innovative concept on deep carbonate reservoir stimulation: Three-dimensional acid fracturing technology

2020 ◽  
Vol 7 (5) ◽  
pp. 484-497
Author(s):  
Jianchun Guo ◽  
Bo Gou ◽  
Nan Qin ◽  
Junsheng Zhao ◽  
Lin Wu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Carbonate Reservoir ◽  
Acid Fracturing ◽  
Reservoir Stimulation ◽  
Innovative Concept

scholarly journals Theoretical and experimental study of the pulling force of jet bits in radial drilling technology

2009 ◽  
Vol 6 (4) ◽  
pp. 395-399 ◽  
Author(s):  
Ruichang Guo ◽  
Gensheng Li ◽  
Zhongwei Huang ◽  
Shouceng Tian ◽  
Xiaoning Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Drilling Technology ◽  
Pulling Force ◽  
Radial Drilling

A Study on Burr Formation and Controlling Technology in Precision or Ultra-Precision Drilling

2007 ◽  
Author(s):  
Yunming Zhu ◽  
Guicheng Wang ◽  
Pingkuan Zhang ◽  
Lijie Ma ◽  
Chunyan Zhang
Keyword(s):  
Metal Cutting ◽  
Burr Formation ◽  
Precision Machining ◽  
Machining Accuracy ◽  
New Approach ◽  
Cutting Test ◽  
Drilling Technology ◽  
Ultra Precision ◽  
Vibration Drilling ◽  
Exit Burr

Burr formation is a common phenomena in metal cutting. The burr not only effect precision of parts directly but influence the assembly quality badly. Therefore, the control and deburring technology of machining burrs has become one of the key problem in precision or ultra-precision and automatic procession. In traditional drilling, the exit burr is bigger than the entrance burr, and its hazard is more larger. Moreover deburring process is very complex. According to these status quo, a new method of active control of the exit burr is put forward using vibration drilling. Mechanism of chip broken and burr formation in vibration drilling are analysed systematically and an equipment of vibration drilling is developed based on drilling experiment. Cutting test on A3 material, brass (H62) and 1Cr18Ni9Ti stainless steel is carried out using the method of vibration drilling. As a result, cutting character is improved because of the using of this method. Also, machining accuracy and surface integrality of parts are improved remarkably and the size of the exit burr is controlled effectively in vibration drilling. The development of vibration drilling device provides a new approach for the progress of ultra-precision drilling technology. Vibration drilling device and technology developed in this study can be widely used to ultra-precision machining.

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