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 The paper has not been peer reviewed.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.

Fishbone Stimulation Enhances Tight Carbonate Productivity

2021 ◽  
Vol 73 (07) ◽  
pp. 58-59
Author(s):  
Chris Carpenter
Keyword(s):  
Phase 1 ◽  
Carbonate Reservoir ◽  
Growth Strategy ◽  
Abu Dhabi ◽  
Low Permeability ◽  
Successful Implementation ◽  
Well Testing ◽  
Phase 2 ◽  
Carbonate Formation ◽  
Tight Carbonate

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 202636, “Fishbone Stimulation: A Game Changer for Tight Carbonate Productivity Enhancement—Case Study of First Successful Implementation at ADNOC Onshore Fields,” by R.V. Rachapudi, SPE, S.S. Al-Jaberi, SPE, and M. Al Hashemi, SPE, ADNOC, et al., 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 operator’s first successful installation of fishbone stimulation technology was aimed at establishing vertical communication between layers in a tight carbonate reservoir and maximizing the reservoir contact. Furthermore, the advanced stimulation technology connects natural fractures within the reservoir, bypasses near-wellbore damage, and allows the thin sublayers to produce. This technology requires running standard lower-completion tubing with fishbone subs preloaded with 40-ft needles and stimulation with the rig on site. Introduction The operator plans to develop tight carbonate reservoirs as part of its production growth strategy. Field Q is a 35×15-km field under development with a phased approach. Phase 1 was planned and production began in 2014. Phase 2 is being developed by drilling wells using the pad concept. Reservoir A, a tight carbonate formation with low permeability ranging from 1 to 3 md and porosity from 15 to 25%, is part of Phase 2 development. The aver-age thickness of Reservoir A is approximately 90 ft across the field, with seven sublayers. The major challenge of Reservoir A development is poor vertical communication and low permeability. Based on appraisal-well data, the average production rate per well is approximately 200 to 400 BOPD with a wellhead pressure of 200 psi. Therefore, appraisal-well testing confirmed the poor productivity of the wells. In addition, the wells are required to produce to the central facilities located in a Phase 1 area 18 km away from Phase 2. In summary, each Phase 2 well is required to be produced against a back-pressure of 500 to 600 psi. Fishbone Stimulation Technology Fishbone stimulation technology is an uncemented-liner rig-deployed completion stimulation system. The liner includes fishbone subs at fixed intervals, and each sub consists of four needles that will connect the sublayers by penetrating into the formation. The typical fishbone completion after installation and jetting the needles in formation is shown in Fig. 1.

Enhancing Reservoir Stimulation and Productivity Through Reservoir Tunneling Technologies: A Review on Recent Development

2021 ◽  
Author(s):  
Eyad A. Alali ◽  
Mohammed A. Bataweel
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Simulation Studies ◽  
Reservoir Properties ◽  
Gas Industry ◽  
Hydrocarbon Recovery ◽  
Reservoir Stimulation ◽  
Recent Developments ◽  
Operational Practices ◽  
Radial Drilling

Abstract The oil and gas industry has been developing various technologies to increase the productivity and recovery of hydrocarbons from conventional and unconventional reservoirs. Reservoir stimulation is an essential operation used to enhance production in many fields around the world. Hydraulic fracturing and acid treatments are the main stimulation methods. Reservoir tunneling concepts are used to drill branched channels in the formation from the main wellbore. With thousands of tunnels drilled to date, it is a viable technique that can improve the recovery of selected reservoirs. This paper reviews the recent developments in reservoir tunneling technologies and their current applications. These tunneling methods can be categorized mainly into water jetting, abrasive jetting, reactive jetting (acid), and needle and mechanical tunneling (radial drilling). The paper includes reviewing and analyzing these techniques based on documented literature results that include simulation studies, lab and yard experiments, field implementation, candidate selection, operational requirements, technology enhancements, advantages, limitations, and challenges of each technique. The paper provides a comprehensive summary of different tunneling techniques focusing on the operational practices, tunneling mechanisms, tunneling depth, and recent advancements available in the market. The most effective applications of the tunneling techniques are in stimulating low permeability, depleted and thin reservoirs, layers close to water zones, and bypassing near wellbore formation damage. The efficiency of creating tunnels is affected by many factors such as reservoir properties, nozzle, and fluid types, etc. The tunnel shape and trajectory are affected by reservoir geological properties. The combination of the tunneling with other stimulation techniques can result in more effective treatments, which enhance the methods of current stimulation. Reservoir tunneling technologies can pave the way to improve hydrocarbon recovery and enable access to unstimulated formations.

Expanding Horizon - A Feasibility Study on Implementing PMCD Operation Using Coiled Tubing Drilling Technology to Develop Marginal Reserves in Karstic Carbonate Reservoir, Offshore Malaysia

2021 ◽  
Author(s):  
Ahmad Zahid Murshidi Zakaria ◽  
Muhammad Idham Khalid ◽  
Shahrul Nizam Mohd Effendi ◽  
Mark Arathoon ◽  
Mohamad Zakwan Zainal Abidin ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Cost Effective ◽  
Carbonate Reservoir ◽  
Reservoir Properties ◽  
Design Elements ◽  
Safety Standards ◽  
Coiled Tubing ◽  
Technical Requirements ◽  
Well Design ◽  
Drilling Technology

Abstract With the current uncertain situation regarding the stability of oil prices in the world, operators have been pushed to develop their available resources in a cost-effective way. Lately, there has been increased interest in the application of Coiled Tubing Drilling, especially for accessing bypassed hydrocarbon in mature or late-stage fields. This paper describes the feasibility study done to examine the possibility of using Coiled Tubing Drilling package/equipment to drill and complete a sidetrack well in a karstic carbonate reservoir with total losses issue by applying the principles of Pressurized Mud Cap Drilling (PMCD). This will be the first time that such method is being utilized for developing karstic carbonate reservoirs in Offshore Malaysia. The paper will go through the background of the project (generic field information, reservoir properties, well design and architecture), the critical design elements for the system (technical requirements, safety standards, operational and logistical factors) and the contingency scenarios considered. Based on the aforementioned items, a fit-for-purpose Coiled Tubing Drilling equipment arrangement together with suitable PMCD method and light annular mud (LAM) selection were proposed to cater for the specific challenges of the well. It was concluded that the application of PMCD using Coiled Tubing Drilling Package is feasible with some modification to the equipment, line up and operational procedures.

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.

Comparative analysis of production potential in Bulla-deniz and Umid gas-condensate fields

2020 ◽  
pp. 21-26
Author(s):  
E.H. Ahmadov ◽  
Keyword(s):  
Oil And Gas ◽  
Reduction Rate ◽  
Chemical Properties ◽  
Gas Production ◽  
Layer System ◽  
Reservoir Properties ◽  
Technical Parameters ◽  
Recovery Curves ◽  
Well Model ◽  
Drilling Technology

The paper studies the reduction rate of gas production in the wells of Bulla-deniz field drilled to VIII horizon. With this purpose, geological (reservoir properties, oil-gas saturation, net thickness, formation pressure and temperature, formation heterogeneity, multi-layer system, tectonic faults, physical-chemical properties of oil and gas etc.) and technological (well structure, measuring and transportation system, well operation regime, drilling technology etc.) conditions of formation were analyzed and the well model of VII and VIII horizons of Bulla-deniz field using these geological and technical parameters developed as well. For the estimation of impact of geological and technical aspects on production, sensitivity analysis was carried out on the models. The suggestions for elaboration of uncertainty of geological and technical parameters affecting production dynamics were developed. To reveal the reasons for production differences of the wells, it was proposed to install borehole manometers, to obtain the data on pressure recovery curves, drainage area, skin-effect impact, permeability and to develop a study plan of bottomhole zone with acid.

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