A Novel Superfine Fibrous Lost Circulation Material Derived From Date Tree for Seepage Loss Control

2018 ◽  
Author(s):  
Jothibasu Ramasamy ◽  
Md Amanullah
Keyword(s):  
Lost Circulation ◽  
Seepage Loss ◽  
Loss Control

Mitigating Lost Circulation Across Permeable Formations of the Gunashli Field in the Caspian Sea with a New Tailored Spacer System

2021 ◽  
Author(s):  
Tom Farrow ◽  
Nurlan Gadimov ◽  
Kyriacos Agapiou ◽  
Mukhtar Safarov
Keyword(s):  
Caspian Sea ◽  
Field Application ◽  
Wellbore Stability ◽  
The Caspian Sea ◽  
Lost Circulation ◽  
History Of ◽  
Drilling Operations ◽  
Zonal Isolation ◽  
Additional Costs ◽  
Loss Control

Abstract Cementing operations seek to minimize non-productive time (NPT) as part of the broad effort to optimize costs. A commonly encountered event that contributes to NPT is lost circulation. Lost circulation may often be associated, and treated, during drilling operations, but can occur during cementing practices, e.g. while running casing in the wellbore and/or circulating cement and treatment fluids. When fluids are lost to the formation and not appropriately cured, cementing objectives may not be met and, ultimately, zonal isolation can be compromised. Additional costs may be incurred to remediate the well construction and achieve a dependable barrier. It is, therefore, of great interest to develop and implement solutions which can facilitate the prevention and treatment of lost circulation. Described herein is the evaluation and use of a new tailored spacer system (TSS) engineered to effectively prevent lost circulation and maintain wellbore stability. The TSS was designed for use in cementing shallow water Caspian Sea wells with permeable formations and a history of losses. The spacer was subjected to conventional spacer tests and simulations including rheological measurements, compatibility assessments and fluid modeling to ensure job requirements would be met. Loss control tests were performed to verify the efficacy of the TSS to effectively prevent losses. All screenings demonstrated the TSS would be well-suited for the intended field application. The spacer system was successfully deployed in Caspian Sea wells and helped meet cementing objectives where conventional treatments failed.

USING DURIAN RIND AS BRIDGING MATERIAL TO OVERCOME FLUID LOSS AND LOST CIRCULATION PROBLEMS IN DRILLING OPERATIONS

2016 ◽  
Vol 78 (8) ◽  
Author(s):  
Nor Fatihah Abdul Majid ◽  
Issham Ismail ◽  
Mohd Fauzi Hamid
Keyword(s):  
Drilling Fluid ◽  
Filter Press ◽  
Fluid Loss ◽  
Lost Circulation ◽  
Water Based ◽  
Drilling Operations ◽  
Excellent Control ◽  
Induced Fractures ◽  
Loss Control ◽  
Durian Rind

Lost circulation is one of the drilling operational problems. It refers to the total or partial loss of drilling fluid into highly permeable zones or natural or induced fractures. This problem is likely to occur when the hydrostatic head pressure of drilling fluid in the hole exceeds the formation pressure. Today, managing lost circulation remains a significant challenge to oilwell drilling operations because it may contribute to high non-productive time. It is imperative to note that the overbalance pressure situation also can cause the invasion of mud filtrate into production zones which will result in formation damage. To address these problems, an experimental investigation has been done on durian rind as an alternative fluid loss and lost circulation materials in water-based mud. Durian rind was selected as a mud loss control material because it contains close to 20% pectin which may complement the formation of high quality mat-like bridges across openings of the formation. The test involved the use of standard mud testing equipment and a lost circulation test cell. Durian rind powder was prepared by cleaning and cutting the durian rind into small pieces of 1 to 2 cm, and then dried them in an oven at 60°C for 48 hours before grinding into five different sizes from coarse to ultra-fine while Hydro-plug, the commercial lost circulation material was supplied by Scomi Energy. The fluid loss test was conducted using a standard low pressure filter press while the bridging test was carried out at 100 psi of pressure difference and ambient temperature using a lost circulation cell. Fine durian in the water-based mud gave the best fluid loss control compared to coarse durian rind, fine and coarse Hydro-plug. The experimental results also showed that at 15 lb/bbl (42.8 kg/m3) optimum concentration, coarse and intermediate durian rind have outperformed Hydro-plug by showing an excellent control of mud losses in 1 and 2 mm simulated fractures.

Experimental and field test analysis of different loss control materials for combating lost circulation in bentonite mud

2017 ◽  
Vol 44 ◽  
pp. 1-8 ◽  
Author(s):  
Alireza Nasiri ◽  
Ahmadreza Ghaffarkhah ◽  
Mostafa Keshavarz Moraveji ◽  
Ali Gharbanian ◽  
Majid Valizadeh
Keyword(s):  
Field Test ◽  
Test Analysis ◽  
Lost Circulation ◽  
Loss Control

scholarly journals Feasibility Study of using Oil Palm Trunk Waste Fiber as Fluid Loss Control Agent and Lost Circulation Material in Drilling Mud

2020 ◽  
Vol 72 (1) ◽  
pp. 9-20
Author(s):  
Arina Sauki ◽  
Muhammad Saifudin Mohd Azmi ◽  
Husna Hayati Jarni ◽  
Wan Zairani Wan Bakar ◽  
Tengku Amran Tengku Mohd ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Oil Palm ◽  
Control Agent ◽  
Fluid Loss ◽  
Drilling Mud ◽  
Lost Circulation ◽  
Oil Palm Trunk ◽  
Loss Control

Lost-Circulation Control for Formation-Damage Prevention in Naturally Fractured Reservoir: Mathematical Model and Experimental Study

SPE Journal ◽  
2017 ◽  
Vol 22 (05) ◽  
pp. 1654-1670 ◽  
Author(s):  
Chengyuan Xu ◽  
Yili Kang ◽  
Lijun You ◽  
Zhenjiang You
Keyword(s):  
Mathematical Model ◽  
Laboratory Data ◽  
Fracture Propagation ◽  
Formation Damage ◽  
Fluid Loss ◽  
Fractured Reservoir ◽  
Geometrical Properties ◽  
Lost Circulation ◽  
Tight Reservoirs ◽  
Loss Control

Summary Drill-in fluid loss is the most important cause of formation damage during the drill-in process in fractured tight reservoirs. The addition of lost-circulation material (LCM) into drill-in fluid is the most popular technique for loss control. However, traditional LCM selection is mainly performed by use of the trial-and-error method because of the lack of mathematical models. The present work aims at filling this gap by developing a new mathematical model to characterize the performance of drill-in fluid-loss control by use of LCM during the drill-in process of fractured tight reservoirs. Plugging-zone strength and fracture-propagation pressure are the two main factors affecting drill-in fluid-loss control. The developed mathematical model consists of two submodels: the plugging-zone-strength model and the fracture-propagation-pressure model. Explicit formulae are obtained for LCM selection dependent on the proposed model to control drill-in fluid loss and prevent formation damage. Effects of LCM mechanical and geometrical properties on loss-control performance are analyzed for optimal fracture plugging and propagation control. Laboratory tests on loss-control effect by use of different types and concentrations of LCMs are performed. Different combinations of acid-soluble rigid particles, fibers, and elastic particles are tested to generate a synergy effect for drill-in fluid-loss control. The derived model is validated by laboratory data and successfully applied to the field case study in Sichuan Basin, China.

Effects of a crosslinking agent on a supramolecular gel to control lost circulation

2021 ◽  
Vol 45 (16) ◽  
pp. 7089-7095
Author(s):  
Bo Wang ◽  
Jinsheng Sun ◽  
Kaihe Lv ◽  
Feng Shen ◽  
Yingrui Bai
Keyword(s):  
Crosslinking Agent ◽  
Network Density ◽  
Cross Linking ◽  
Supramolecular Gel ◽  
Lost Circulation ◽  
The Cross

The Cr3+ can improve the cross-linking degree and network density of the GP-A gel, and enhance its strength and plugging ability to control lost circulation.

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