Acid Stimulation of Openhole Horizontal Section Behind Prepack Screen Using Coiled Tubing and New Isolation Method

1996 ◽  
Author(s):  
W.E. Skip Koshak ◽  
Mike Attah
Keyword(s):  
Isolation Method ◽  
Horizontal Section ◽  
Coiled Tubing ◽  
Stimulation Of

First Multistage Hydraulic Fracturing in Russian Offshore: Integrated Approach to Completion and Stimulation of Apt Deposits of V.Filanovsky Field

2021 ◽  
Author(s):  
Mikhail Yurievich Golenkin ◽  
Denis Vladimirovich Eliseev ◽  
Alexander Anatolyevich Zemchikhin ◽  
Alexey Alexandrovich Borisenko ◽  
Akhmat Sakhadinovich Atabiyev ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Caspian Sea ◽  
Complex Type ◽  
The Caspian Sea ◽  
Multistage Hydraulic Fracturing ◽  
Coiled Tubing ◽  
Sand Control ◽  
Friction Reducing ◽  
First Time ◽  
Stimulation Of

Abstract The paper describes the results of the first multistage hydraulic fracturing operations in Russia on the Caspian Sea shelf in the gas condensate and oil deposits of the Aptian formation of V. Filanovsky field. In addition to the small productive formation depth, long horizontal sections with a complex trajectory and high collapse gradients due to large zenith angles when passing the Albian and Aptian deposits of poorly consolidated sandstones are an additional challenge for choosing a multistage hydraulic fracturing assembly. The above features require the use of modern sand control screens with enhanced frac sleeves. A design was developed which includes frac sleeves and sand control screens that can withstand multiple cycles of hydraulic impact during hydraulic fracturing, as well as many opening/closing cycles. A seawater-based frac fluid system was applied. The frac fleet was located on a pontoon, the coiled tubing – on a platform. For the first time in Russia, a 2-5/8 inch coiled tubing with a complex-type friction reducing system was used to switch coupling/sleeves in conditions of very long horizontal sections, complex trajectories, and high friction coefficients. The minimum distances between the screen's sliding sleeves and frac sleeves did not prevent from performing manipulations in complex environment. For well cleaning, the frac assemblies of reverse rotary-pulse and rotary-directional types were used. At the first stage of the project, the development of an optimal method of well completion was successfully implemented. Due to the close interaction of the operating company, service company, and science & engineering team of the operator, for the first time in Russia the design of downhole equipment with the use of advanced technologies of sand control screens, frac sleeves was presented. This solution has proved its effectiveness – the downhole equipment has retained its operational properties after a long period of well operation and further in the process of hydraulic fracturing. At the second stage of the project, 32 MSHF operations were performed at four wells. To reduce nonproductive time and operational risks, a satellite communication complex was additionally deployed on the pontoon to join the engineering centers of Astrakhan, Moscow, and Houston. After finishing the well development, the design indicators for formation fluid rates were achieved, which proved the effectiveness of the stimulation of the field's target objects – this opens great prospects for further development of low-permeability reservoirs at offshore sites in the Caspian Sea. The successful project implementation and the achievement of the design values of oil flow rates has expanded the possibilities of commercial operation of the low-permeable Aptian formation, complicated by the presence of a gas cap and underlying water. A solution was presented for working in extended horizontal well sections with 2-5/8 inch coiled tubing together with a complex-type mechanical friction reducing system. The economic effect was achieved when solving tasks of manipulating mechanical screen couplings and frac port sleeves without the involvement of downhole tractors. The use of new solutions in the completion assembly made it possible to eliminate additional sand ingress problems.

Bicentric Milling Approach Enables the Recovery of the Horizontal Section of an Unconventional Well in Turkey

2021 ◽  
Author(s):  
Ernesto Franco Delgado ◽  
Felix Jahn ◽  
Liam Weir ◽  
Brian Bruce ◽  
Nestor Carreno
Keyword(s):  
Horizontal Section ◽  
Coiled Tubing ◽  
Cutting Head ◽  
Abnormal Pressure ◽  
Viable Solution ◽  
Casing Damage ◽  
Pump Rate ◽  
Engineering Team ◽  
Efficient Recovery ◽  
Casing Deformation

Abstract During the completion phase of an unconventional well in Turkey, casing deformation represented a challenge to the operator and Coiled Tubing (CT) service provider due to the potential loss of almost 70% of the horizontal section. The deformation obstructed the path to continue the milling the remaining plugs. The implementation of bicentric mills and Multi-Cycling Circulation Valve (MCCV) incorporated in the milling assembly allowed efficient recovery of the horizontal section. The tubing condition analysis done by the engineering team showed that symmetric mills would not be beneficial. Conformance tubing was not an option. Bicentric milling approach was deemed the most viable solution. This approach consists of using offset mills where rotation causes the cutting head to cover an area larger than the mill's frontal face. However, this approach could lead the CT pipe getting stuck due to big junk left. The use of a MCCV, limiting the number of milled plugs, and performing a fishing run between milling runs were key to the success of the bicentric milling approach. The Turkish well was completed with ten stages isolated by nine aluminum plugs. During the fracturing of stage seven, an abnormal pressure drop was observed while keeping the same pump rate, indicating possible casing damage. After all the stages were fractured, the CT proceeded to mill the plugs using a 4.63-in Outside Diameter (OD) mill. After three plugs were milled, an obstruction was detected, indicated by frequent aggressive motor stalls at the same depth. A tapered mill was run to perform a tubing conformance, and after several hours of unsuccessful penetration, the tool was recovered. At the surface, the tool showed signs of wear around 4.268 in. A 4.0-in OD mill was used to drift this section, and it passed free. An analysis of both the plug anatomy and the casing condition was done to determine the most viable solution. A 4-in OD bicentric mill was designed to pass across the restriction with an adjusted eccentricity to allow higher contact area. Three bicentric milling runs were made with the limit of a maximum of two plugs per run to avoid a CT stuck situation due to the larger cuttings as a result of the mill's asymmetry. The sparsity of information on using bicentric mills for plug milling required research into unpublished practices for such scenarios. This paper documents bicentric milling approach, the use of offset mills, and the mitigation measurements taken during this project to avoid a stuck situation due to large debris generated.

Expanding the Envelope of Coiled-Tubing (CT) Reach for Stimulation of Ultradeep Openhole Horizontal Wells

2010 ◽  
Author(s):  
Mubarak Audah Al-Dhufairi ◽  
Saleh Al-Ghamdi ◽  
Jose Vidal Noya ◽  
Khaled Al-Aradi ◽  
Samer Al-Sarakbi ◽  
...  
Keyword(s):  
Horizontal Wells ◽  
Coiled Tubing ◽  
Stimulation Of

World's First Combined Acid Stimulation of Horizontal Openhole Gravel-Pack Application of Coiled Tubing, Dynamically Positioned Vessel, and Floating Production, Storage, and Offloading, Offshore Brazil

2007 ◽  
Author(s):  
Philip Johan Bogaert ◽  
Gustavo Dario Cavazzoli ◽  
Daniel Rafael Perez ◽  
Bernhard R. Lungwitz ◽  
Cesar Roberto Guimaraes De Carvalho ◽  
...  
Keyword(s):  
Coiled Tubing ◽  
Gravel Pack ◽  
Stimulation Of

New Chemical Treatment Selectively Placed via Coiled Tubing to Isolate Depleted Upper Zone Allows for Access and Stimulation of Unproduced Lower Zone

2014 ◽  
Author(s):  
Alaa A. Dashash ◽  
Ataur R. Malik ◽  
A.E. Mukhliss ◽  
A.H. Al Yaseen ◽  
M. Albuali ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Lower Zone ◽  
Coiled Tubing ◽  
Stimulation Of

Comprehensive approach to production stimulation of massive cold heterogeneous carbonate formation using coiled tubing

2012 ◽  
Author(s):  
Vladimir Ivanovich Dnistrjanskij ◽  
Aleksander Nikolaevich Mokshaev ◽  
Oleg Mikhailovich Bogatyrev ◽  
Ruslan Fatkhetdinovich Ilgildin ◽  
Rifat Eduardovich Kayumov ◽  
...  
Keyword(s):  
Comprehensive Approach ◽  
Coiled Tubing ◽  
Carbonate Formation ◽  
Stimulation Of

Setting New Milestones for Coiled Tubing Intervention in Mega-Reach Wells

2021 ◽  
Author(s):  
Edward Jason Wheatley ◽  
Gladwin Correia ◽  
Samhar Adi ◽  
Nestor Molero ◽  
Cremilton Silva ◽  
...  
Keyword(s):  
Middle East ◽  
Optical Fiber ◽  
Development Strategy ◽  
Safety Margin ◽  
Lessons Learned ◽  
Surveillance Program ◽  
Software Modeling ◽  
Horizontal Section ◽  
Field Development ◽  
Coiled Tubing

Abstract Maximizing reservoir contact through extended-reach and mega-reach wells has become a prevalent field development strategy for major offshore operators in the Middle East. This is especially true for the giant oilfield "A", where drilling targets go beyond 40,000 ft. measured depth (MD), with MD/TVD ratios in excess of 4.5:1. Such challenging horizons call for a detailed re-evaluation of well interventions. In 2019, the well surveillance program in the field A required intervention in a mega-reach well with a MD over 35,500 ft. and 4.5:1 MD/TVD ratio. This reach was unthinkable only a few years ago but has been made possible thanks to several recent key technological advancements, such as coiled tubing (CT) equipped with optical fiber and new CT hydraulic tractors, proactive and detailed planning during the drilling phase, the development of highly engineered CT string designs, surface equipment upgrades, and accurate software modeling. The target well is an oil producer with horizontal section beyond 23,000 ft., completed with 6 5/8-in. pre-perforated liner and 23 swellable packers placed across the 8 1/2-in. open hole section. A multiphase production logging tool was selected to assess the production profile along its horizontal drain. With a target depth beyond the reach of conventional wireline, CT equipped with optical fiber emerged as the optimum solution to facilitate reach and overcome the weight and pumping limitations of wired CT. A comprehensive CT reach modeling exercise compared the performance of several 2-in. and 2 3/8-in. CT string designs and identified operational requirements and reach gains from CT hydraulic tractors. As a result, an engineered 2-in. CT tapered string of near 36,700 ft. was developed, capable of being equipped with optical fiber line, while delivering the required flow rate and differential pressure to the CT hydraulic tractor without compromising any operational safety margin. At the time of manufacturing, this was considered the longest CT string ever produced and fitted for downhole telemetry. The operation itself set new records for well interventions in mega-reach wells, with a CT reach above 35,500 ft. MD, including a hydraulic tractoring footage over 15,650 ft. MD with spaced slugs of chemical friction reducer. This case study explains how to develop a safe, robust, and effective solution to mega-reach well challenges using the CT-conveyed optical fiber telemetry technology in one of the deepest wells in the field A, setting a new global record in CT reach. The lessons learned are now the reference for other operators in the Middle East and across the globe for performing interventions in wells that continue to be stretched in its extended reach. It also depicts why telemetry through optical fiber is key to the success of such projects and provides an overview of technology needs for the future of mega-reach well developments.

Successful Selective Stimulation of Open Hole Dual Lateral Gas-Condensate Producers with a Coiled Tubing, Hydra Jetting Tool and New Isolation Sleeve in Saudi Arabia

2010 ◽  
Author(s):  
Francisco Garzon ◽  
Carlos Franco ◽  
Hussain A. Al-Saeed ◽  
Wael M. Al-Omair ◽  
Noel H. Ginest ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Gas Condensate ◽  
Selective Stimulation ◽  
Coiled Tubing ◽  
Open Hole ◽  
Stimulation Of

First Worldwide Coiled Tubing Stimulation of a Quad-Lateral Extended Reach Power Water Injector Using Multi-Lateral Tool With Gamma Ray & Distributed Temperature Survey

2017 ◽  
Author(s):  
H. Jassem ◽  
Ayedh M Al-Shehri ◽  
Nayef S. Al-Shammari ◽  
S. D. Al-Gamber ◽  
K. M. Mutairi ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Coiled Tubing ◽  
Stimulation Of

scholarly journals Production logging via coiled tubing fiber optic infrastructures (FSI) and its application in shale gas wells

2019 ◽  
Vol 12 (24) ◽  
Author(s):  
Xuangang Meng ◽  
Weijia Wang ◽  
Zhenzhen Shen ◽  
Jiangyong Xiong ◽  
Heng Zhang
Keyword(s):  
Shale Gas ◽  
Fiber Optic ◽  
Development Mode ◽  
Gas Wells ◽  
Horizontal Section ◽  
Well Drilling ◽  
Coiled Tubing ◽  
Conventional Production ◽  
Main Development ◽  
Well Trajectory

AbstractMultistage stimulation operation using plug and perf technique is the main development mode in domestic shale gas play. Because of the particularity of well trajectory, well geometry caused by rapid drilling operation in shale gas wells, the residual plug debris after plug milling, the complexity of multiphase flow in horizontal section, etc., it is difficult for conventional production logging to meet the needs of shale gas wells. However, a number of shale gas wells need to be evaluated in the effects of well drilling and completion and fracturing, providing the guidance for the next fracturing design, so the production logging via coiled tubing fiber optic infrastructures (FSI) can satisfy the needs of shale gas wells, really reflect water holdup and gas holdup in different fracturing stage, and effectively evaluate fracturing effect of each stage.

Sign in / Sign up

Export Citation Format

Share Document