Drilling Fluid Technology for Extended-Reach Horizontal Wells in Cuba

2013 ◽  
Vol 765-767 ◽  
pp. 270-273
Author(s):  
Cheng Luo ◽  
Yi Qin ◽  
Xiao Chun Cao
Keyword(s):  
Maintenance Treatment ◽  
Drilling Fluid ◽  
Horizontal Wells ◽  
Strong Inhibition ◽  
Accident Rate ◽  
Fluid System ◽  
Treatment Measures ◽  
Drilling Cost

This Extended-reach horizontal wells lies in Guanabo block of Cuba, using the KCl polymer drilling fluid system which has strong inhibition. To strengthen the drilling fluid inhibition, it keeps the concentration of GW FA-367 at around 0.5% in the construction, KCl is 8%~10%, GW POLYCOL is 2% ~ 3%, it also takes the use of other assorted maintenance treatment measures at the same time. The results of application show that, compared with other wells of this region, this well greatly shortens the drilling cycle, reduces the accident rate and the drilling cost, the drilling fluid lubricity is good.

The Test of Amine Polymeric Alcohol Drilling Fluid System in Baka Block

2012 ◽  
Vol 268-270 ◽  
pp. 614-617
Author(s):  
Yu Xue Sun ◽  
Bo Xu ◽  
Yu Ning Xie
Keyword(s):  
Coal Seam ◽  
Shear Force ◽  
Drilling Fluid ◽  
Strong Inhibition ◽  
Fluid System ◽  
Thick Coal Seam ◽  
Recovery Test ◽  
Jurassic Coal ◽  
Tertiary Recovery ◽  
Reservoir Protection

2500 meters below Baka block appears extremely thick coal seam and distributed long, unconsolidated and mixed up with carbonaceous mudstone between beds. The relieved stress after a new borehole is drilled will lead to the wellbore caving and peeling and finally form an approximate elliptic borehole, causing vicious accidents such as bit bouncing, bit freezing while tripping and even borehole discarding. The anti-sloughing capability of Amine Polymeric Alcohol (AP-1) was evaluated by tertiary recovery test and core immersing test, the formula of Amine Polymeric Alcohol drilling fluid system was also optimized. Indoor research shows that the drilling fluid is of strong inhibition and pollution resistance. Its plastic viscosity is 24 mPa•s, shear force is 11 Pa and permeability recovery value reached（81.9-89.6）%. The successful test in Ke 21 Ping 1 well indicates that Amine Polymeric Alcohol drilling fluid system with powerful inhibition can effectively solve the collapse of Jurassic coal seam and carbonaceous mudstone, present high lubricity and can improve the drilling speed effectively, meanwhile, it performances well in gaining reservoir protection, controlling drilling fluid rheological properties, enhancing pollution resistance and reducing the occurrence of complex accidents downhole. Thus it can provide reference for future drilling operation in sloughing formations.

Study on Horizontal Wells and ERW Drilling Technology of Carrying Cuttings

2012 ◽  
Vol 204-208 ◽  
pp. 397-400
Author(s):  
Cha Ma ◽  
Long Li ◽  
Yu Ping Yang
Keyword(s):  
Drilling Fluid ◽  
Horizontal Wells ◽  
Petroleum Exploration ◽  
Drilling Fluids ◽  
Fluid System ◽  
Exploration And Production ◽  
Drilling Technology ◽  
Plastic Ratio ◽  
New Type ◽  
Good Heat Resistance

Hole cleaning was very difficult in horizontal wells and extended reach wells (ERW), which was the technical bottleneck in raising the progress and success rate of petroleum exploration and production at present. A new type of treating agent for drilling fluid (CNRJ), designed for horizontal wells and extended-reach wells, was synthesized. CNRJ was added to drilling fluids, and the rheological properties, temperature-resisting property and suspension performance of drilling fluid system were analysed. The results indicate that CNRJ has good compatibility with drilling fluid system, and the dynamic plastic ratio of drilling fluid system can be adjusted from 0.20 to 1.12. In addition, the drilling fluid system has good static suspension ability for cuttings, good heat resistance and pollution resistance.

MEG and its Application in Drilling Fluid

2011 ◽  
Vol 287-290 ◽  
pp. 2088-2093
Author(s):  
Yu Xue Sun ◽  
Yu Ning Xie ◽  
Chang Xiao
Keyword(s):  
Horizontal Well ◽  
Drilling Fluid ◽  
Poor Performance ◽  
Horizontal Wells ◽  
Drilling Fluids ◽  
Structure And Properties ◽  
Fluid System ◽  
Well Drilling ◽  
Drilling Waste ◽  
Treatment Agent

Recently, oil-based drilling fluids are used mainly in horizontal wells, which are highly cost and have a poor performance to carry cuttings and may result in environmental problems because of the ineffective dispose of drilling waste. Therefore, a study is commenced to develop a water-based drilling fluid system (MEG drilling fluid system) that can satisfy the needs of horizontal well. The study begins with the molecular structure and properties of monomers about MEG. Then it selected the treatment agent which has a good compatibility with MEG, and confirms a best formula of MEG drilling fluid system. By the comparison between MEG and other drilling fluids, the former has evident advantages in cave preventing, lubricity, solid carrying and formation damage controlling; also it can minimize the environmental effects. The above proves that MEG drilling fluid system can well meet the need for horizontal well drilling.

The Effectiveness of Cationic and Polymer Inhibitors on Shale

2015 ◽  
Vol 1125 ◽  
pp. 205-209 ◽  
Author(s):  
Abdul Razak Ismail ◽  
Radzuan Junin ◽  
Issham Ismail ◽  
Mohd Fauzi Hamid
Keyword(s):  
Oil And Gas ◽  
Drilling Fluid ◽  
Oil Well ◽  
Borehole Stability ◽  
Fluid System ◽  
Testing Procedures ◽  
Filtration Loss ◽  
Drilling Cost ◽  
Dispersion Test ◽  
Polymer Type

Maintaining the borehole stability while drilling oil and gas wells is a major problem when drilling through water sensitive formation. Drilling using oil-based drilling fluid is the most effective solution to control shale. Due to the increasing environmental constraints on the use of mineral oil-based drilling fluid system, expensive research has been studied to optimize oil well operations and minimize drilling cost using new water-based drilling fluid system. In this study, the effectiveness of three commonly used shale inhibitors were tested, where cationic polymer and KLA-Gard are cationic type inhibitors and PHPA is polymer type inhibitor. Two types of shale samples were used in this study, both were taken from Malaysia. Each shale sample represents different degree in swelling and dispersion characteristic. The testing procedures were employed for the shale reactivity evaluation, inhibitors’ performance evaluation, rheology and filtration loss effect evaluation as well as the character of the recovered shale from dispersion test. Result showed that the cationic type inhibitor is suitable to be used for swelling shale. For disperse shale, polymer type inhibitor is the best selection to be added in the drilling fluid system. The combination of cationic inhibitor used along with the polymer inhibitor showed reduction in dispersion and swelling tendency. It is also found that the cationic inhibitors showed well compatibility with other polymers in the ionic solution. Cationic inhibitors do not affect the rheology and filtration loss properties but polymer inhibitors affect these properties.

The Application of PEM Drilling Fluid System in Environmentally Sensitivity Area

2001 ◽  
Author(s):  
Xu Shaocheng ◽  
Xiaojian Jin ◽  
Li Zili ◽  
Xinjing Xiang
Keyword(s):  
Drilling Fluid ◽  
Fluid System

Application of Benzotriazole Corrosion Inhibitor in Synthetic-Based Drilling Fluid and its Overall Impact in Improving Drilling Fluid Functionality

2021 ◽  
Author(s):  
Zhao Xionghu ◽  
Saviour Bassey Egwu ◽  
Deng Jingen ◽  
Miao Liujie
Keyword(s):  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Coefficient Of Friction ◽  
Hot Rolling ◽  
Drilling Fluid ◽  
Effect Of Temperature ◽  
Fluid Loss ◽  
Fluid Composition ◽  
Fluid System ◽  
Before And After

Abstract The effect of corrosion inhibitor Benzotriazole on synthetic-based mud system was studied. Rheological performance of the benzotriazole enhanced synthetic-based fluid system was studied and compared against the base mud. To study its effect on dynamic wellbore conditions, different drilling fluid compositions were placed in a hot rolling oven for 16 hours at temperatures 150 °C and 170°C and the effect of temperature on mud properties were studied. Tests carried out include rheological test (before and after hot rolling), filtrate pH, lubricity test, and fluid loss test. The corrosion penetration rate was studied using the weight loss method. Based on experiment results, the synthetic-based mud system which comprised of benzotriazole displayed a reduction in coefficient of friction up to 95.93%. At ambient condition, optimal ratio of mineral oil:benzotriazole (M:B) which gives best lubricity performance on synthetic-based mud system is 80:20. This leads to improved corrosion inhibition and lubricity of the synthetic-based fluid by reducing the coefficient of friction up to 90.13%. Increased temperature led to further decrease in coefficient of friction with a % torque reduction of 95.93 displayed by the 80:20 ratio M:B mud composition at 170 °C. Significant alterations of the mud composition rheological and fluid loss parameters before and after exposure to high temperature in hot rolling oven were not observed. pH values were maintained ≥7 at the dynamic conditions highlighting solubility of the formulated fluid composition and absence of contaminants which can pose significant threats to the rates of corrosion in drill pipes. Increasing the concentration of Benzotriazole led to a reduction in corrosion rate. However, as the temperature effect increased, the corrosion rate elevated. Based on results from this investigation, it was concluded that Benzotriazole can be applied as a corrosion inhibitor in a synthetic-based drilling fluid system as an alternative corrosion inhibitor without significant alteration of the base mud properties. Benefits of this will be the optimization of extended reach well drilling operations due to excellent lubricity performance, corrosion rate reduction, compatibility with HPHT wellbore condition and fluid loss control.

scholarly journals Application of Artificial Intelligence Techniques in Predicting the Lost Circulation Zones Using Drilling Sensors

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Abdulmalek Ahmed ◽  
Salaheldin Elkatatny ◽  
Abdulwahab Ali ◽  
Mahmoud Abughaban ◽  
Abdulazeez Abdulraheem
Keyword(s):  
Artificial Intelligence ◽  
Real Time ◽  
Drilling Fluid ◽  
Confusion Matrix ◽  
High Accuracy ◽  
Functional Networks ◽  
Lost Circulation ◽  
Drilling Parameters ◽  
High Pressure High Temperature ◽  
Drilling Cost

Drilling a high-pressure, high-temperature (HPHT) well involves many difficulties and challenges. One of the greatest difficulties is the loss of circulation. Almost 40% of the drilling cost is attributed to the drilling fluid, so the loss of the fluid considerably increases the total drilling cost. There are several approaches to avoid loss of return; one of these approaches is preventing the occurrence of the losses by identifying the lost circulation zones. Most of these approaches are difficult to apply due to some constraints in the field. The purpose of this work is to apply three artificial intelligence (AI) techniques, namely, functional networks (FN), artificial neural networks (ANN), and fuzzy logic (FL), to identify the lost circulation zones. Real-time surface drilling parameters of three wells were obtained using real-time drilling sensors. Well A was utilized for training and testing the three developed AI models, whereas Well B and Well C were utilized to validate them. High accuracy was achieved by the three AI models based on the root mean square error (RMSE), confusion matrix, and correlation coefficient (R). All the AI models identified the lost circulation zones in Well A with high accuracy where the R is more than 0.98 and RMSE is less than 0.09. ANN is the most accurate model with R=0.99 and RMSE=0.05. An ANN was able to predict the lost circulation zones in the unseen Well B and Well C with R=0.946 and RMSE=0.165 and R=0.952 and RMSE=0.155, respectively.

New Chemical Package Produces an Improved Shale Inhibitive Water-Based Drilling Fluid System

1987 ◽  
Author(s):  
J.A. Wingrave ◽  
E. Kubena ◽  
C.F. Douty ◽  
D.L. Whitfill ◽  
D.P. Cords
Keyword(s):  
Drilling Fluid ◽  
Fluid System ◽  
Water Based

Organosilicon Drilling Fluid System for HT Deep Gas Wells

2009 ◽  
Author(s):  
Yuxue Sun ◽  
Yanfen Zhang ◽  
Jingyuan Zhao
Keyword(s):  
Drilling Fluid ◽  
Gas Wells ◽  
Fluid System

Full Scale Flow Loop Experiments of Hole Cleaning Performances of Drilling Fluids

2015 ◽  
Author(s):  
Jan David Ytrehus ◽  
Ali Taghipour ◽  
Sneha Sayindla ◽  
Bjørnar Lund ◽  
Benjamin Werner ◽  
...  
Keyword(s):  
Test Section ◽  
Drilling Fluid ◽  
Drilling Fluids ◽  
Flow Loop ◽  
Base Oil ◽  
Hole Cleaning ◽  
Cleaning Performance ◽  
Water Based ◽  
Fluid Properties ◽  
Drilling Cost

One important requirement for a drilling fluid is the ability to transport the cuttings out of the borehole. Improved hole cleaning is a key to solve several challenges in the drilling industry and will allow both longer wells and improved quality of well construction. It has been observed, however, that drilling fluids with similar properties according to the API standard can have significantly different behavior with respect to hole cleaning performance. The reasons for this are not fully understood. This paper presents results from flow loop laboratory tests without and with injected cuttings size particles using a base oil and a commercial oil based drilling fluid. The results demonstrate the importance of the rheological properties of the fluids for the hole cleaning performance. A thorough investigation of the viscoelastic properties of the fluids was performed with a Fann viscometer and a Paar-Physica rheometer, and was used to interpret the results from the flow loop experiments. Improved understanding of the fluid properties relevant to hole cleaning performance will help develop better models of wellbore hydraulics used in planning of well operations. Eventually this may lead to higher ROP with water based drilling fluids as obtained with oil based drilling fluids. This may ease cuttings handling in many operations and thereby significantly reduce the drilling cost using (normally) more environmentally friendly fluids. The experiments have been conducted as part of an industry-sponsored research project where understanding the hole cleaning performance of various oil and water based drilling fluids is the aim. The experiments have been performed under realistic conditions. The flow loop includes a 10 meter long test section with 2″ OD freely rotating drillstring inside a 4″ ID wellbore made of concrete. Sand particles were injected while circulating the drilling fluid through the test section in horizontal position.

Sign in / Sign up

Export Citation Format

Share Document