Locating and Quantifying Downhole Sand Production with Wireline Sand Detection Tool and Examples of Application in Wells Offshore Caspian Sea

2019 ◽  
Author(s):  
Andrey Timonin ◽  
Eldar Mollaniyazov
Keyword(s):  
Caspian Sea ◽  
Sand Production ◽  
Detection Tool

New Downhole Sand Entry Detection Technology Leads Directly to Successful Remedial Work and Additional Oil Production

2021 ◽  
Author(s):  
Gaurav Agrawal ◽  
Moustafa Eissa ◽  
Kamaljeet Singh ◽  
Shaktim Dutta ◽  
Apoorva Kumar ◽  
...  
Keyword(s):  
Reservoir Characterization ◽  
Sand Particle ◽  
Gas Oil ◽  
Sand Production ◽  
Impact Detection ◽  
Detection Tool ◽  
Detection Technology ◽  
Sand Control ◽  
Remedial Work ◽  
Interpretation Algorithm

Abstract The consequences of sand production are often disadvantageous to the short and long-term productivity of the well. Although some wells routinely experience controllable sand production, these are the exception rather than the rule. Sand production and its management over the life of the well is not an attractive situation but is often essential to extract the resource. Knowing the root cause behind sand inflow in a well and the possible results can inform an appropriate strategy to safely extract as much of the resource as possible. The sands in such reservoir units often have high permeability and are mechanically weak and prone to sand production. The producing wells are often completed with gravel-packed completions for efficient sand control. Most of the wells have multi-zone completions for better productivity but this further complicates reservoir characterization. This paper describes the first use of downhole sand impact detection technology in such fields. The sand detection technology integrates the fully digitized high-resolution acquisition with signal processing and interpretation algorithm to enhance the sand particle detections as small as 0.1 mm in diameter and up to 1,500 impacts per second. The tool is designed to immune the sensors from any background noise and gas/liquid jetting effect. A combination of production logging tools (PLT) and the sand impact detection tool, was used to understand four phase zonal contributions (gas, oil, water and sand) and pinpoint sand entry in these cases. Results exceeded expectations and the ability for the sand detection tool to accurately detect the point of sand entry enabled immediate intervention to eliminate sand production in these case studies. One of them also resulted in increased production of 7.4kb/d oil without any sand flow and with greatly reduced gas-oil ratio as compared to pre-intervention production. The work clearly demonstrates the practical and effective use of downhole sand impact detection with new sand detection technology to identify and isolate sand production in wells. The innovative tool design makes it feasible to detect even small sand particles in adverse wellbore conditions and varied production rates, thus adding a detection of the fourth phase in an otherwise three phase production log.

5 Years Application of Acoustic Sand Detection Tool in Sandy Wells Environment

2020 ◽  
Author(s):  
T. Widarena
Keyword(s):  
Monitoring System ◽  
Pipe Wall ◽  
Particle Collision ◽  
Sand Particle ◽  
Production Volume ◽  
Sand Production ◽  
Detection Tool ◽  
Additional Production ◽  
Production Wells ◽  
Significant Production

Significant production of Mahakam Block comes from sand prone reservoirs. Uncontrolled sand production can lead to catastrophic consequences. A robust sand detection and monitoring system is crucial for optimizing production without jeopardizing safety. A non-intrusive Acoustic Sand Detection (ASD) tool has been widely implemented in Mahakam swamp and offshore fields. The tool can be portable or permanently installed, depending on the availability of power and telemetry. Sand rate is derived from the signal received by sensor after listening to the sound of sand particle collision with the pipe wall. If the sand rate exceeds the defined Maximum Allowable Sand Rate (MASR) of 0.02 g/s, the well will be declared as sandy. As the consequence, the well could be ramped down or shut-in for choke verification. Of all the sandy cases detected by ASD, more than twenty cases turned out to be incident preventive. The wellhead choke had been eroded such that it could have been catastrophic. The erosion occurred on wells producing from shallow/upper layer reservoirs with high delta pressure between upstream and downstream choke. The application of acoustic sand detection tool as the primary sand monitoring system (78%) in Mahakam has proven to be rewarding. Around 149 BCF of additional production volume during 2014-2019 was the result of implementation of sand detection and monitoring using ASD tool, as means of optimizing the life of production wells. This paper demonstrates Mahakam invaluable experience with ASD tool to optimize sandy wells production safely.

Is the Slope Between the Alborz Mountains and Caspian Sea in Northern Iran a Bottleneck for Migrating Raptors?

2018 ◽  
Vol 52 (4) ◽  
pp. 530-533 ◽  
Author(s):  
Michele Panuccio ◽  
Bahareh Ghafouri ◽  
Elham Nourani
Keyword(s):  
Caspian Sea ◽  
Northern Iran

THE NUMBER AND QUALITATIVE CHARACTERISTICS OF FRY FISH IN SHALLOW COASTAL WATERS OF THE VOLGA IN THE SUMMER-AUTUMN PERIOD OF 2012

2017 ◽  
pp. 65-73
Author(s):  
Edward Vladimirovich Nikitin
Keyword(s):  
Fish Species ◽  
Coastal Waters ◽  
Caspian Sea ◽  
The Caspian Sea ◽  
Volga River ◽  
Commercial Fish ◽  
Autumn Period ◽  
Fish Juveniles ◽  
Qualitative Characteristics ◽  
Shallow Coastal Waters

Shallow coastal waters of the Volga river is a flooded feeding area for fish juveniles of nonmigratory fish species. There takes place annual downstream migration of fluvial anadromous fish species from spawning grounds of the Volga river to the Northern Caspian Sea. The most important factors determining the number and qualitative characteristics of fry fishes are the level of the Caspian Sea (currently having a tendency to the lowering), hydrological and thermal regimes of the Volga river. Researches were carried out in definite periods of time. In the summer-autumn period of 2012 fry fishes were presented by 19 species (13 of them were commercial species), which belonged to 9 families. The article gives data on all the commercial fish species. In the first decade of July the maximum number of fry fish was registered in the western part of the Volga outfall offshore - in box 247 (19.86 mln specimens/km2), in the eastern part - in box 142 (20.4 mln specimens/km2). The most populous were roach, red-eye, silver bream and bream; size-weight characteristics were better in the areas remoted from the Volga delta. In the third decade of July the quantitative indicators of fry fish on these areas decreased, size-weight characteristics greatly increased. In the second decade of October in the western part of the seaside there were registered increased pre-wintering concentrations of fish juveniles, their qualitative indicators increased, which is evidence to favorable feeding conditions in 2012.

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