Practical Strategies and Engineered Solutions to Minimize the Impact of Lost Circulation Problem

The fuzzy drilling fluid can effectively solve the serious lost circulation problem in the surface layer, it can be used in the raise drilling. The fuzzy ball drilling fluid with the density of 0.9g/cm3 was prepared in the laboratory. With the driving pressure increases, researchers do the plugging experiment with & without 0.5MPa back pressure. The experiments show that in a back pressure condition, fuzzy ball drilling fluid can effectively plugging formation. Besides, fuzzy ball drilling fluid can effectively control the leakage without back pressure. In the process of GuiZhou LongAn raise boring, the surface layer of the hole leaked seriously with leak off rate of more than 40m3/h in the first 10m and once exceeded 100 m3/h.The field use Fuzzy ball drilling fluid on the well plugging. The circulation is rapidly established after the Fuzzy ball drilling fluid was injected into the well, and the leakage rate has been effectively controlled.In the raise drilling, the fuzzy ball drilling fluid can only control the leakage rate but can’t seal the leakage formation.

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ANALISIS LOST CIRCULATION PEMOMPAAN GRAVEL SLURRY PADA SUMUR X BERDASARKAN WAKTU TUNGGU

PETRO ◽

10.25105/petro.v5i2.2364 ◽

2018 ◽

Vol 5 (2) ◽

Author(s):

Novrianti Novrianti ◽

Ali Musnal ◽

Febriyan Ramadhan

Keyword(s):

Oil And Gas ◽

Test Line ◽

Rock Type ◽

Complete Loss ◽

Gas Well ◽

Lost Circulation ◽

Line Chart ◽

Pressure Test ◽

Gravel Pack ◽

Circulation Problem

Unconsolidated formations tend to have sand problem that can lead to decline of production in Oil and Gas Well. There are some methods can be used to resolve sand problem like liner completion, meshrite liner, perforated liner completion, and gravel pack completion. Rock type of Well X is unconsolidated stone and the method which used in that well to surmount sand problem that occurred is gravel pack method. However, during pumping of gravel slurry there are some problems, partial or complete loss of the gravel slurry into the formation (lost circulation), waiting on sand sattle is one method that has developed to resolve loss circulation. This method is done by stopping pumping slurry after the amount of incoming sand has reached teoritical and more than 50%. The aim of this research to determine volume of gravel slurry that is needed and total of lost gravel sand. Gravel slurry needed to overcome sand problem in Well X consists of 109 sacks of gravel sand, 259.5 bbl of water, and 1834 lb (18 sacks) of KCL. Analysis of pressure test line chart to find out lost circulation problem. There are 147 sacks gravel sand missing as a result of lost circulation problem from 256 sacks of gravel sand that is pumped.

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Study of the Anti-Dilution Properties of a Special Viscoelastic Gel Applied in Severe Lost Circulation Control

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.174-177.496 ◽

2012 ◽

Vol 174-177 ◽

pp. 496-501

Author(s):

Ping Quan Wang ◽

Zai Jun Li ◽

Xun Yong Nie ◽

Yang Bai

Keyword(s):

Pore Volume ◽

Affecting Factors ◽

Heat Of Dilution ◽

Change Rate ◽

Lost Circulation ◽

Large Size ◽

Water Breakthrough ◽

Potential Safety ◽

Temperature Shear ◽

Circulation Problem

The special viscoelastic gel has been successfully applied to deal with severe lost circulation problem in more than thirty wells. It was demonstrated that the viscoelastic gel exerted important functions in dealing with the underground blowout-loss circulation coexistence problem in Shuangmiao Well 1, and the high H2S content blowout-loss circulation coexistence problem in Luojia Well 2, and high CO2 content blowout-loss circulation coexistence problem in Xushen-8 well H1. One of the important reasons why the gel was applied to deal with the problems successfully was that the gel has strong anti-dilution ability. The strong anti-dilution ability of the gel is one of the important reasons why to plugging successfully. This paper studied the heat of solution of the polymer ZND and heat of dilution of the gel-ZND based on thermodynamics. The smaller the heat of dilution is, the stronger anti-dilution ability of the gel ZND has. Chose the volume change rate through screening out to characterize the anti-dilution property of the gel and investigated the affecting factors. The experimental results showed that the quantity of screen residue decreased with the increasing of temperature, shear rate and shear time，but increased with increasing of concentration. Studied anti-dilution ability of gel-ZND in the fragmentized zone simulated by a large size plugging device. The displaced volume rates of gel-ZND with concentration above 1.0% displaced by equivalent pore volume water are all smaller than 16%. The displaced volume rate of the gel was less than 2% continuing displaced by the gel-ZND by two times pore volume water when water breakthrough came. It validated that the special gel-ZND had strong anti-dilution ability. The results provide experimental basis and theoretical guidance for resolving the potential safety hazard caused by severe loss circulation or blowout-loss circulation coexistence.

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Lost Circulation Material Characteristics of Apple Skin Powder in Drilling Mud

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1119.564 ◽

2015 ◽

Vol 1119 ◽

pp. 564-568

Author(s):

Nurul Aimi Ghazali ◽

M.Y.M. Yusof ◽

A. Azizi ◽

T.A.T. Mohd ◽

N. Alias ◽

...

Keyword(s):

Ph Value ◽

Filter Press ◽

Slight Reduction ◽

Fibrous Materials ◽

Drilling Mud ◽

Lost Circulation ◽

Mud Cake ◽

Cake Formation ◽

Mud Filtrate ◽

Circulation Problem

Lost circulation is one of the most troublesome problems encountered in drilling due to uncontrolled flow of drilling mud into the formation that likely to happen due to ineffective filter cake. The smaller particles of drilling mud are able to break through into the larger void spaces in the formation which lead to lost circulation. Hence, fibrous materials in apple skin being identified to be used as lost circulation material (LCM) in drilling mud to prevent loss of circulation. Mud rheology tests and API filter press test are performed on the apple skin in drilling mud to find out the potential of fiber in apple skin to be used as LCM. From the mud rheology test, it was found that the specific gravity does not affected by the increasing concentration of apple skin and only a slight reduction in pH value to the acidic condition of the apple skin. As for API filter press test, the additions of apple skin in mud reduced the mud filtrate and increase the mud cake formation thickness. Apple skin fibers have a potential to be used as LCM in drilling mud due to the ability in reducing the mud filtrate and increasing the mud cake thickness that will prevents mud lost circulation problem to happen.

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The Impact of Diagenesis and Compaction on Drilling Failure Detection

Volume 8: Polar and Arctic Sciences and Technology; Petroleum Technology ◽

10.1115/omae2017-61858 ◽

2017 ◽

Author(s):

Nur Suriani Mamat

Keyword(s):

Failure Detection ◽

Complex Problem ◽

Wellbore Stability ◽

Related Factors ◽

Wellbore Instability ◽

Lost Circulation ◽

Drilling Parameters ◽

Sensitive Clay ◽

A Chain ◽

The Impact

An important problem during drilling operation is wellbore instability; a complex problem caused by mechanical and chemical related factors. Even the best drilling practice could evade small instability problems that later may become irreparable. The risk of wellbore stability is mostly related to drilling, tripping and reaming activity with, including lost circulation, sloughing repair and loss of penetration. In this paper, the impact of historical and state of diagenesis and compaction on borehole instability has been studied, systematized, and used for general modelling. All the concepts are presented as symbolic concepts in a hierarchical order and linked in a chain of cause-effect relationships to wellbore failures. Through surveillance of drilling parameters, diagenesis and compaction were identified through formation hardness, well depth, shale type, and cuttings/cavings characteristic. From the analysis, kaolinite, which normally exists in intermediate diagenesis, is most likely to cause bit balling when hydrated. Smectite, which is water-sensitive clay, would cause chemical wellbore instability in water-based mud. Carbonates formation such as dolomite and limestone is more likely to result in lost circulation as compared to shale. Our work demonstrates how state of diagenesis and compaction could influence wellbore instability condition. This knowledge could be applied to understand the behavior of rock formation being drilled and would influence the prediction of probable failures as an end result. The method presented here integrates theoretical knowledge and real-time drilling data to envisage the most likely failure.

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Using of surface back pressure with water based mud in managed pressure drilling technique to solve lost circulation problem in Southern Iraqi Oil Fields

Journal of Petroleum Research and Studies ◽

10.52716/jprs.v11i3.531 ◽

2021 ◽

Vol 11 (3) ◽

pp. 28-47

Author(s):

Batool Abdullah Dhayea ◽

Faleh. H. M. Almahdawi ◽

Sinan I. M. Al-Shaibani

Keyword(s):

Water Injection ◽

Pressure Profile ◽

Injection Rate ◽

Back Pressure ◽

Oil Fields ◽

Drilling Process ◽

Lost Circulation ◽

Managed Pressure Drilling ◽

Wellbore Pressure ◽

Circulation Problem

Many drilling problems are encountered continuously while drilling oil wells in the southern Iraqi oil fields. Many of these problems are ineffectively handled resulting in a longer non-productive time. This study aims to identify the formations such as Dammam, and Hartha formations،diagnose potential problems and provide the solution for lost circulation problem. After conducting a comprehensive study on the subject and based on available data, previous studies and some information, the managed pressure drilling (MPD) method was the best technique to solve this problem. This process may use various techniques including control of back pressures .Thus, reducing the risk and control the costs of drilled wells, which have narrow pressure window by managing the wellbore pressure profile. The well plan software program provided by Halliburton Company was used, this software is based on a database and data structure common to many of Landmark’s drilling applications. Mud used with various injection rates to choose the rate that provides the conditions to achieve the best drilling process, as it using mud weights of (8.8 -8.7 ) ppg and applied a surface back pressure (50 psi). Depending on specifications of second hole the optimal injection rate was chosen using the (hydraulics) program. As a results, rate of water injection (850) gpm, is the best which it provides a good efficient cutting transport ratio (CTR), which means high stability and preventing formation damage in addition to controlling in mud losses

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Engineered Solution to Reduce the Impact of Lost Circulation During Drilling and Cementing in Rumaila Field, Iraq

10.2523/iptc-18245-ms ◽

2015 ◽

Cited By ~ 19

Author(s):

Umar Arshad ◽

Bipin Jain ◽

Muhammad Ramzan ◽

Wassem Alward ◽

Lenin Diaz ◽

...

Keyword(s):

Lost Circulation ◽

The Impact

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